US20140293065A1 - Camera - Google Patents
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- US20140293065A1 US20140293065A1 US14/303,590 US201414303590A US2014293065A1 US 20140293065 A1 US20140293065 A1 US 20140293065A1 US 201414303590 A US201414303590 A US 201414303590A US 2014293065 A1 US2014293065 A1 US 2014293065A1
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- 238000000034 method Methods 0.000 claims description 53
- 230000003287 optical effect Effects 0.000 claims description 26
- 230000008569 process Effects 0.000 claims description 23
- 239000000428 dust Substances 0.000 description 28
- 238000010586 diagram Methods 0.000 description 11
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000011514 reflex Effects 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N17/00—Diagnosis, testing or measuring for television systems or their details
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B19/00—Cameras
- G03B19/02—Still-picture cameras
- G03B19/12—Reflex cameras with single objective and a movable reflector or a partly-transmitting mirror
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B17/00—Details of cameras or camera bodies; Accessories therefor
- G03B17/02—Bodies
- G03B17/12—Bodies with means for supporting objectives, supplementary lenses, filters, masks, or turrets
- G03B17/14—Bodies with means for supporting objectives, supplementary lenses, filters, masks, or turrets interchangeably
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B43/00—Testing correct operation of photographic apparatus or parts thereof
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N17/00—Diagnosis, testing or measuring for television systems or their details
- H04N17/002—Diagnosis, testing or measuring for television systems or their details for television cameras
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/80—Camera processing pipelines; Components thereof
- H04N23/81—Camera processing pipelines; Components thereof for suppressing or minimising disturbance in the image signal generation
- H04N23/811—Camera processing pipelines; Components thereof for suppressing or minimising disturbance in the image signal generation by dust removal, e.g. from surfaces of the image sensor or processing of the image signal output by the electronic image sensor
Definitions
- the embodiment of the present disclosure relates generally to a checking method and, more particularly, to a method for checking a camera and to a camera applying the method.
- a method for checking a camera and a camera applying the method are provided.
- the method and camera address the problem of having to perform complex camera set-up processes manually when using a conventional camera in order to check for the presence of dust on a sensor of the camera.
- one aspect of the embodiment of the present disclosure is to provide a camera.
- the camera includes a photo-sensitive element and a controller.
- the controller is electrically connected to the photo-sensitive element.
- the photo-sensitive element is configured to capture an image of an object.
- the controller is configured to convert a color level value of each of pixels of the image into an image gray level value, and the controller is configured to generate an alarm message to display on a screen of the camera when one of the image gray level values is higher than a predetermined gray level threshold value.
- a camera in another aspect of the embodiment of the present disclosure, includes a photo-sensitive element and a controller.
- the controller is electrically connected to the photo-sensitive element.
- the photo-sensitive element is configured to capture an image of an object.
- the controller is configured to acquire a green level value of each of a plurality of pixels of the image, and the controller is configured to generate an alarm message to display on a screen of the camera when one of the green level values is greater than a predetermined green level threshold value.
- the embodiments of the present disclosure provide a method for checking a camera and a camera applying the method.
- the method and camera address the problem of having to perform complex camera setup processes manually when using a conventional camera in order to check for the presence of dust on a sensor of the camera.
- the method and the camera of the embodiments of the present disclosure enable accurate checking for the presence of dust on the sensor.
- FIG. 1 schematically shows a circuit block diagram of a camera according to embodiments of the present disclosure
- FIG. 2 schematically shows a diagram of a display frame of a camera screen according to embodiments of the present disclosure
- FIG. 3 schematically shows a flow diagram of a method for checking a camera according to embodiments of the present disclosure
- FIG. 4 schematically shows a flow diagram of a method for checking a camera according to embodiments of the present disclosure.
- FIG. 5 schematically shows a flow diagram of a method for checking a camera according to embodiments of the present disclosure.
- “around,” “about” or “approximately” shall generally mean within 20 percent, preferably within 10 percent, and more preferably within 5 percent of a given value or range. Numerical quantities given herein are approximate, meaning that the term “around,” “about” or “approximately” can be inferred if not expressly stated.
- FIG. 1 schematically shows a circuit block diagram of a camera 100 according to embodiments of the present disclosure.
- the camera 100 includes a photo-sensitive element 110 , an input/output interface 120 , a controller 130 , a screen 140 , a storing element 150 , an optical lens 160 , and a distance measuring module 170 .
- the controller 130 includes an aperture module 132 , a shutter module 134 , a focal length module 136 , and an ISO module 138 ,
- the photo-sensitive element 110 , the input/output interface 120 , the screen 140 , the storing element 150 , the optical lens 160 , and the distance measuring module 170 are all electrically connected to the controller 130 .
- the problem of lost focus generated by capturing an image with the same color scheme can be solved through use of the distance measuring module 170 of the embodiment of the present disclosure to measure the distance between an object and the camera. Subsequently, the controller 130 is operable to control the optical lens 160 to perform a focusing process according to the distance, thereby solving the problem of lost focus.
- the controller 130 is operable to control the optical lens 160 to perform a focusing process according to the distance, thereby solving the problem of lost focus.
- the input/output interface 120 is operable to set the aperture value and the shutter value of the optical lens 160 respectively through the aperture module 132 and the shutter module 134 of the controller 130 such that the photo-sensitive element 110 is operable to capture the image of an object through the optical lens 160 according to the distance.
- the aperture module 132 of the controller 130 is operable to set the aperture value of the optical lens 160 by obtaining a predetermined aperture value from the storing element 150
- the shutter module 134 of the controller 130 is operable to set the shutter value of the optical lens 160 by obtaining a predetermined shutter value from the storing element 150 , such that the photo-sensitive element 110 is operable to capture the image of the object through the optical lens 160 according to the distance.
- the camera 100 is operable to obtain a predetermined parameter value from the storing element 150 to adjust the optical lens 160 automatically so as to address the problem of having to perform complex camera set-up processes manually when using a conventional camera in order to check for the presence of dust on a sensor of the camera.
- the controller 130 is operable to convert the color level value of each of the pixels of the image into an image gray level value, and the controller 130 is also operable to determine whether one of the image gray level values is greater than a predetermined gray level threshold value. When one of the gray level values is greater than the predetermined gray level threshold value, the controller 130 is operable to generate an alarm message, and the screen 140 of the camera 100 is operable to display the alarm message.
- the input/output interface 120 is operable to adjust the predetermined gray level threshold value. In addition, the input/output interface 120 is further operable to set the aperture value and adjust the predetermined gray level threshold value according to the aperture value.
- the embodiment of the present disclosure can adaptively adjust standards related to the problem of dust according to different apertures such that the operation of the camera 100 of the embodiment of the present disclosure is more convenient.
- the controller 130 is further operable to detect a position of a pixel with an image gray level value that is greater than the predetermined gray level threshold value, and to display information of the position on the screen 140 of the camera 100 ,
- FIG. 2 schematically shows a diagram of a display frame of a camera screen according to embodiments of the present disclosure.
- a division into nine squares is used.
- the controller 130 detects that a position of a pixel with an image gray level value that is greater than the predetermined gray level threshold value is located on the upper left corner, the controller 130 will output a position signal according to the position. Subsequently, information of the position is displayed on the screen of the camera 100 as shown in FIG. 2 .
- a user can perform a dust-disposal process only with respect to the area of the photo-sensitive element 110 on which the dust is present such that the risk of contaminating the photo-sensitive element 110 can be reduced.
- the main difference is the operation mode of the camera 100 .
- the embodiment of the present disclosure can employ the distance measuring module 170 to measure the distance between an object and the camera 100 .
- the controller 130 is then operable to control the optical lens 160 to perform a focusing process according to the distance.
- the input/output interface 120 is operable to set the aperture value and the shutter value of the optical lens 160 respectively through the aperture module 132 and the shutter module 134 of the controller 130 such that the photo-sensitive element 110 is operable to capture the image of the object through the optical lens 160 according to the distance.
- the aperture module 132 of the controller 130 is operable to set the aperture value of the optical lens 160 by obtaining a predetermined aperture value from the storing element 150
- the shutter module 134 of the controller 130 is operable to set the shutter value of the optical lens 160 by obtaining a predetermined shutter value from the storing element 150 , such that the photo-sensitive element 110 is operable to capture the image of the object through the optical lens 160 according to the distance.
- the camera 100 is operable to obtain a predetermined parameter value from the storing element 150 to adjust the optical lens 160 automatically so as to address the problem of having to perform complex camera set-up processes manually when using a conventional camera in order to check for the presence of dust on a sensor of the camera.
- the controller 130 is operable to acquire the green level value of each of the pixels of the image, and the controller 130 is also operable to determine whether one of the green level values is greater than a predetermined green level threshold value. When one of the green level values is greater than the predetermined green level threshold value, the controller 130 is operable to generate an alarm message, and the screen 140 of the camera 100 is operable to display the alarm message.
- the input/output interface 120 is operable to adjust the predetermined green level threshold value. In addition, the input/output interface 120 is further operable to set the aperture value and adjust the predetermined green level threshold value according to the aperture value.
- the embodiment of the present disclosure can adaptively adjust standards related to the problem of dust according to different apertures such that the operation of the camera 100 of the embodiment of the present disclosure is more convenient.
- controller 130 is further operable to detect a position of a pixel with a green level value that is greater than the predetermined green level threshold value, and to display information of the position on the screen of the camera.
- FIG. 2 schematically shows a diagram of a display frame of a camera screen according to embodiments of the present disclosure. In this exemplary embodiment, a division into nine squares is used.
- controller 130 detects that a position of a pixel with a green level value that is greater than the predetermined green level threshold value is located on the upper left corner, the controller 130 will output a corresponding position signal according to the position. Subsequently, information of the position is displayed on the screen of the camera 100 as shown in FIG. 2 .
- a user can perform a dust-disposal process only with respect to the area of the photo-sensitive element 110 on which the dust is present such that the risk of contaminating the photo-sensitive element 110 can be reduced.
- the controller 130 is further operable to acquire a red level value, the green level value, and a blue level value of each of the pixels of the image, and the controller 130 is operable to generate the alarm message to display on the screen 140 of the camera 100 when one of the red, green, and blue level values is greater than a corresponding predetermined red level threshold value, the corresponding predetermined green level threshold value, or a corresponding predetermined blue level threshold value.
- FIG. 3 schematically shows a flow diagram of a method 300 for checking a camera according to embodiments of the present disclosure.
- the method for checking a camera 300 comprises the steps of capturing an image of an object using a photo-sensitive element (step 310 ), converting the color level value of each of the pixels of the image into an image gray level value (step 330 ), and displaying an alarm message on the screen of the camera when one of the image gray level values is higher than a predetermined gray level threshold value (step 350 ).
- a predetermined gray level threshold value step 350
- an alarm message will be displayed on the sreen 140 of the camera 100 .
- FIG. 4 schematically shows a flow diagram of a method 400 for checking a camera according to embodiments of the present disclosure.
- step 410 a distance between an object and a photo-sensitive element is measured by the distance measuring module 170 .
- step 420 a focusing process is performed by the focal length module 136 of the controller 130 according to the distance and the image of the object is captured using the photo-sensitive element 110 .
- step 430 an aperture value and a shutter value are set by the aperture module 132 and the shutter module 134 of the controller 130 respectively.
- the aperture value and the shutter value of the optical lens 160 are set by obtaining a predetermined aperture value and a predetermined shutter value from the storing element 150 by the aperture module 132 and the shutter module 134 of the controller 130 .
- step 440 a color level value of each of the pixels of the image is converted into an image gray level value.
- step 450 the predetermined gray level threshold value is adjusted according to the aperture value.
- step 460 a determination is made as to whether one of the image gray level values is greater than the predetermined gray level threshold value, and in step 470 , the alarm message is displayed on the screen of the camera if one of the image gray level values is greater than the predetermined gray level threshold value.
- step 480 normal information is displayed on the screen of the camera if the image gray level values are all not greater than the predetermined gray level threshold value.
- step 470 a position of a pixel with an image gray level value that is greater than the predetermined gray level threshold value is detected, and information of the position is displayed on the screen of the camera in step 490 .
- a user can perform a dust-disposal process only with respect to the area of the photo-sensitive element 110 on which the dust is present such that the risk of contaminating the photo-sensitive element 110 can be reduced.
- the embodiment of the present disclosure can adaptively adjust standards related to the problem of dust according to different apertures such that the operation of the camera 100 is more convenient when the camera 100 employs the method 400 for checking the camera 100 of the embodiment of the present disclosure.
- the method 400 for checking a camera described with reference to FIG. 4 further comprises step 410 and step 420 .
- the method 400 for checking a camera of the embodiment of FIG. 4 can solve the problem of lost focus generated by capturing an image with the same color scheme (for example, white) through the step of measuring the distance between the object and the camera by the distance measuring module 170 and performing the focusing process according to the distance in step 420 .
- the image of the object can be captured through the optical lens 160 of the photo-sensitive element 110 .
- FIG. 5 schematically shows a flow diagram of a method 500 for checking a camera according to embodiments of the present disclosure.
- the distance between an object and the camera can be measured by the distance measuring module 170 in step 510 of the embodiment of the present disclosure, and the focusing process can be performed according to the distance in step 520 to solve the problem of lost focus.
- the image of the object can be captured through the optical lens 160 of the photo-sensitive element 110 .
- an aperture value and a shutter value of the optical lens 160 are set by the aperture module 132 and the shutter module 134 of the controller 130 respectively.
- the aperture value and the shutter value of the optical lens 160 are set by obtaining a predetermined aperture value and a predetermined shutter value from the storing element 150 by the aperture module 132 and the shutter module 134 of the controller 130 .
- the method 500 for checking a camera of the embodiment of the present disclosure is performed to obtain a predetermined parameter value from the storing element 150 to adjust the optical lens 160 automatically so as to address the problem of having to perform complex camera set-up processes manually when using a conventional camera in order to check for the presence of dust on a sensor of the camera.
- a red level value, a green level value, and a blue level value of each of the pixels of the image can be acquired by the controller 130
- a predetermined red level threshold value, a predetermined green level threshold value, and a predetermined blue level threshold value can be adjusted according to the aperture by the input/output interface 120 .
- the predetermined red level threshold value, the predetermined green level threshold value, and the predetermined blue level threshold value can be adjusted according to the aperture value due to the fact that there are different standards related to the problem of dust when adopting different apertures.
- the embodiment of the present disclosure can adaptively adjust standards related to the problem of dust according to different apertures such that the operation of the camera 100 is more convenient when the camera 100 employs the method 500 for checking the camera 100 of the embodiment of the present disclosure.
- the alarm message is displayed on the screen of the camera in step 570 . If all of the color level values are less than or equal to the corresponding color level threshold values, normal information is displayed on the screen of the camera in step 580 .
- step 590 detection is performed with respect to a position of a pixel with one of a red level value, a green level value, and a blue level value that is greater than the corresponding predetermined red level threshold value, the corresponding predetermined green level threshold value, or the corresponding predetermined blue level threshold value, and information of the position is displayed on the screen of the camera.
- a user can perform a dust-disposal process only with respect to the area of the photo-sensitive element 110 on which the dust is present such that the risk of contaminating the photo-sensitive element 110 can be reduced.
- the method 300 , 400 , 500 for checking a camera can be performed with software, hardware, and/or firmware.
- the implementer may opt for a mainly hardware and/or firmware implementation; alternatively, if flexibility is paramount, the implementer may opt for a mainly software implementation; or, yet again alternatively, the implementer may opt for some combination of hardware, software, and/or firmware.
- optical aspects of implementations will typically employ optically oriented hardware, software, and or firmware.
- each of the steps of the method 300 , 400 , 500 for checking a camera is named in accordance with the function performed in said step, and such naming is merely used to describe the technology in the embodiment of the present disclosure in detail, but the present disclosure is not limited in this regard. Therefore, combining the steps of said method into one step, dividing the steps into several steps, or rearranging the order of the steps is within the scope of the embodiment in the present disclosure.
- the method 300 , 400 , 500 for checking a camera and a camera 100 applying the method of the embodiment of the present disclosure can adaptively adjust standards related to the problem of dust according to different apertures due to the fact that there are different standards related to the problem of dust when adopting different apertures. As a result, the operation of the camera 100 is more convenient.
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Abstract
Description
- This application is a Continuation Application of U.S. application Ser. No. 13/592,991, filed on Aug. 23, 2012, which claims priority of Taiwanese Patent Application No. 101110392, filed on Mar. 26, 2012, the entirety of which is incorporated by reference herein.
- 1. Field of Disclosure
- The embodiment of the present disclosure relates generally to a checking method and, more particularly, to a method for checking a camera and to a camera applying the method.
- 2. Description of Related Art
- With the prevalence of digital single lens reflex cameras (DSLRs) in recent years, many optical manufacturers are producing a variety of lenses according to different requirements, such that users are able to adopt different kinds of lenses and thereby enjoy the benefit of capturing pictures with different focal. lengths. However, the problem of dust entering the camera is increased with the changing of the lenses.
- To remove the dust accumulated during changing of the lenses, there is a need to perform complex camera set-up processes manually in order to check for the presence of dust on a sensor of the camera. Such camera set-up processes are extremely complex, particularly for ordinary users.
- In summary, the existing apparatus and techniques still have obvious defects and need further improvement. In order to solve the above problems, those skilled in the art are trying hard to find a solution, but no suitable method has been proposed.
- A method for checking a camera and a camera applying the method are provided. The method and camera address the problem of having to perform complex camera set-up processes manually when using a conventional camera in order to check for the presence of dust on a sensor of the camera.
- Thus, one aspect of the embodiment of the present disclosure is to provide a camera. The camera includes a photo-sensitive element and a controller. The controller is electrically connected to the photo-sensitive element. The photo-sensitive element is configured to capture an image of an object. The controller is configured to convert a color level value of each of pixels of the image into an image gray level value, and the controller is configured to generate an alarm message to display on a screen of the camera when one of the image gray level values is higher than a predetermined gray level threshold value.
- In another aspect of the embodiment of the present disclosure, a camera is provided. The camera includes a photo-sensitive element and a controller. The controller is electrically connected to the photo-sensitive element. The photo-sensitive element is configured to capture an image of an object. The controller is configured to acquire a green level value of each of a plurality of pixels of the image, and the controller is configured to generate an alarm message to display on a screen of the camera when one of the green level values is greater than a predetermined green level threshold value.
- In summary, the embodiments of the present disclosure provide a method for checking a camera and a camera applying the method. The method and camera address the problem of having to perform complex camera setup processes manually when using a conventional camera in order to check for the presence of dust on a sensor of the camera. Moreover, the method and the camera of the embodiments of the present disclosure enable accurate checking for the presence of dust on the sensor.
- The disclosure can be more fully understood by reading the following detailed description of the embodiment, with reference made to the accompanying drawings as follows:
-
FIG. 1 schematically shows a circuit block diagram of a camera according to embodiments of the present disclosure; -
FIG. 2 schematically shows a diagram of a display frame of a camera screen according to embodiments of the present disclosure; -
FIG. 3 schematically shows a flow diagram of a method for checking a camera according to embodiments of the present disclosure; -
FIG. 4 schematically shows a flow diagram of a method for checking a camera according to embodiments of the present disclosure; and -
FIG. 5 schematically shows a flow diagram of a method for checking a camera according to embodiments of the present disclosure. - The present disclosure is more particularly described in the following examples that are intended as illustrative only since numerous modifications and variations therein will be apparent to those skilled in the art. Various embodiments of the disclosure are now described in detail. Referring to the drawings, like numbers indicate like components throughout the views. As used in the description herein and throughout the claims that follow, the meaning of “a,” “an,” and “the” includes plural reference unless the context clearly dictates otherwise. Also, as used in the description herein and throughout the claims that follow, the meaning of “in” includes “in” and “on” unless the context clearly dictates otherwise.
- The terms used in this specification generally have their ordinary meanings in the art, within the context of the disclosure, and in the specific context where each term is used. Certain terms that are used to describe the disclosure are discussed below, or elsewhere in the specification, to provide additional guidance to the practitioner regarding the description of the disclosure. The use of examples anywhere in this specification, including examples of any terms discussed herein, is illustrative only, and in no way limits the scope and meaning of the disclosure or of any exemplified term. Likewise, the disclosure is not limited to various embodiments given in this specification.
- As used herein, “around,” “about” or “approximately” shall generally mean within 20 percent, preferably within 10 percent, and more preferably within 5 percent of a given value or range. Numerical quantities given herein are approximate, meaning that the term “around,” “about” or “approximately” can be inferred if not expressly stated.
- As used herein, the terms “comprising,” “including,” “having,” “containing,” “involving,” and the like are to be understood to be open-ended, i.e., to mean including but not limited to.
-
FIG. 1 schematically shows a circuit block diagram of acamera 100 according to embodiments of the present disclosure. As shown in the figure, in one aspect of the present disclosure, thecamera 100 includes a photo-sensitive element 110, an input/output interface 120, acontroller 130, ascreen 140, astoring element 150, anoptical lens 160, and adistance measuring module 170. Furthermore, thecontroller 130 includes anaperture module 132, ashutter module 134, afocal length module 136, and anISO module 138, - With respect to configuration, the photo-
sensitive element 110, the input/output interface 120, thescreen 140, thestoring element 150, theoptical lens 160, and thedistance measuring module 170 are all electrically connected to thecontroller 130. - The problem of lost focus generated by capturing an image with the same color scheme (for example, white) can be solved through use of the distance measuring
module 170 of the embodiment of the present disclosure to measure the distance between an object and the camera. Subsequently, thecontroller 130 is operable to control theoptical lens 160 to perform a focusing process according to the distance, thereby solving the problem of lost focus. - In addition, the input/
output interface 120 is operable to set the aperture value and the shutter value of theoptical lens 160 respectively through theaperture module 132 and theshutter module 134 of thecontroller 130 such that the photo-sensitive element 110 is operable to capture the image of an object through theoptical lens 160 according to the distance. In another embodiment of the present disclosure, theaperture module 132 of thecontroller 130 is operable to set the aperture value of theoptical lens 160 by obtaining a predetermined aperture value from thestoring element 150, and theshutter module 134 of thecontroller 130 is operable to set the shutter value of theoptical lens 160 by obtaining a predetermined shutter value from thestoring element 150, such that the photo-sensitive element 110 is operable to capture the image of the object through theoptical lens 160 according to the distance. Hence, thecamera 100 is operable to obtain a predetermined parameter value from the storingelement 150 to adjust theoptical lens 160 automatically so as to address the problem of having to perform complex camera set-up processes manually when using a conventional camera in order to check for the presence of dust on a sensor of the camera. - Moreover, the
controller 130 is operable to convert the color level value of each of the pixels of the image into an image gray level value, and thecontroller 130 is also operable to determine whether one of the image gray level values is greater than a predetermined gray level threshold value. When one of the gray level values is greater than the predetermined gray level threshold value, thecontroller 130 is operable to generate an alarm message, and thescreen 140 of thecamera 100 is operable to display the alarm message. - In one embodiment, the input/
output interface 120 is operable to adjust the predetermined gray level threshold value. In addition, the input/output interface 120 is further operable to set the aperture value and adjust the predetermined gray level threshold value according to the aperture value. - For example, it can be determined that there is dust on the photo-
sensitive element 110 if one of the image gray level values is greater than the predetermined gray level threshold value. When this occurs, in order to warn a user to perform a clear process, an alarm message will be displayed on thescreen 140 of thecamera 100. In addition, the gray level threshold value is adjusted according to aperture value due to the fact that there are different standards related to the problem of dust when adopting different apertures. Hence, the embodiment of the present disclosure can adaptively adjust standards related to the problem of dust according to different apertures such that the operation of thecamera 100 of the embodiment of the present disclosure is more convenient. - In one embodiment, the
controller 130 is further operable to detect a position of a pixel with an image gray level value that is greater than the predetermined gray level threshold value, and to display information of the position on thescreen 140 of thecamera 100, - An example will now be provided with reference to
FIG. 2 which schematically shows a diagram of a display frame of a camera screen according to embodiments of the present disclosure. In this exemplary embodiment, a division into nine squares is used. When thecontroller 130 detects that a position of a pixel with an image gray level value that is greater than the predetermined gray level threshold value is located on the upper left corner, thecontroller 130 will output a position signal according to the position. Subsequently, information of the position is displayed on the screen of thecamera 100 as shown inFIG. 2 . Hence, a user can perform a dust-disposal process only with respect to the area of the photo-sensitive element 110 on which the dust is present such that the risk of contaminating the photo-sensitive element 110 can be reduced. - Compared with the previous aspect of the present disclosure, in another embodiment, the main difference is the operation mode of the
camera 100. First of all, in order to prevent the problem of lost focus, the embodiment of the present disclosure can employ thedistance measuring module 170 to measure the distance between an object and thecamera 100. Thecontroller 130 is then operable to control theoptical lens 160 to perform a focusing process according to the distance. - In addition, the input/
output interface 120 is operable to set the aperture value and the shutter value of theoptical lens 160 respectively through theaperture module 132 and theshutter module 134 of thecontroller 130 such that the photo-sensitive element 110 is operable to capture the image of the object through theoptical lens 160 according to the distance. In another embodiment of the present disclosure, theaperture module 132 of thecontroller 130 is operable to set the aperture value of theoptical lens 160 by obtaining a predetermined aperture value from the storingelement 150, and theshutter module 134 of thecontroller 130 is operable to set the shutter value of theoptical lens 160 by obtaining a predetermined shutter value from the storingelement 150, such that the photo-sensitive element 110 is operable to capture the image of the object through theoptical lens 160 according to the distance. Hence, thecamera 100 is operable to obtain a predetermined parameter value from the storingelement 150 to adjust theoptical lens 160 automatically so as to address the problem of having to perform complex camera set-up processes manually when using a conventional camera in order to check for the presence of dust on a sensor of the camera. - Moreover, the
controller 130 is operable to acquire the green level value of each of the pixels of the image, and thecontroller 130 is also operable to determine whether one of the green level values is greater than a predetermined green level threshold value. When one of the green level values is greater than the predetermined green level threshold value, thecontroller 130 is operable to generate an alarm message, and thescreen 140 of thecamera 100 is operable to display the alarm message. - In one embodiment, the input/
output interface 120 is operable to adjust the predetermined green level threshold value. In addition, the input/output interface 120 is further operable to set the aperture value and adjust the predetermined green level threshold value according to the aperture value. - For example, it can be determined that there is dust on the photo-
sensitive element 110 if one of the green level values is greater than the predetermined green level threshold value. When this occurs, in order to warn a user to perform a clear process, an alarm message will be displayed on thescreen 140 of thecamera 100. In addition, the green level threshold value is adjusted according to aperture value due to the fact that there are different standards related to the problem of dust when adopting different apertures. Hence, the embodiment of the present disclosure can adaptively adjust standards related to the problem of dust according to different apertures such that the operation of thecamera 100 of the embodiment of the present disclosure is more convenient. - In one embodiment,
controller 130 is further operable to detect a position of a pixel with a green level value that is greater than the predetermined green level threshold value, and to display information of the position on the screen of the camera. An example will now be provided with reference toFIG. 2 which schematically shows a diagram of a display frame of a camera screen according to embodiments of the present disclosure. In this exemplary embodiment, a division into nine squares is used. Whencontroller 130 detects that a position of a pixel with a green level value that is greater than the predetermined green level threshold value is located on the upper left corner, thecontroller 130 will output a corresponding position signal according to the position. Subsequently, information of the position is displayed on the screen of thecamera 100 as shown inFIG. 2 . Hence, a user can perform a dust-disposal process only with respect to the area of the photo-sensitive element 110 on which the dust is present such that the risk of contaminating the photo-sensitive element 110 can be reduced. - In still another embodiment, the
controller 130 is further operable to acquire a red level value, the green level value, and a blue level value of each of the pixels of the image, and thecontroller 130 is operable to generate the alarm message to display on thescreen 140 of thecamera 100 when one of the red, green, and blue level values is greater than a corresponding predetermined red level threshold value, the corresponding predetermined green level threshold value, or a corresponding predetermined blue level threshold value. -
FIG. 3 schematically shows a flow diagram of a method 300 for checking a camera according to embodiments of the present disclosure. As shown in the figure, the method for checking a camera 300 comprises the steps of capturing an image of an object using a photo-sensitive element (step 310), converting the color level value of each of the pixels of the image into an image gray level value (step 330), and displaying an alarm message on the screen of the camera when one of the image gray level values is higher than a predetermined gray level threshold value (step 350). Hence, it can be determined that there is dust on a photo-sensitive element 110 if one of the image gray level values is greater than the predetermined gray level threshold value. When this occurs, in order to warn a user to perform a clear process, an alarm message will be displayed on thesreen 140 of thecamera 100. -
FIG. 4 schematically shows a flow diagram of a method 400 for checking a camera according to embodiments of the present disclosure. - Reference is now made to both
FIG. 1 andFIG. 4 . Instep 410, a distance between an object and a photo-sensitive element is measured by thedistance measuring module 170. Instep 420, a focusing process is performed by thefocal length module 136 of thecontroller 130 according to the distance and the image of the object is captured using the photo-sensitive element 110. Instep 430, an aperture value and a shutter value are set by theaperture module 132 and theshutter module 134 of thecontroller 130 respectively. In another embodiment of the present disclosure, the aperture value and the shutter value of theoptical lens 160 are set by obtaining a predetermined aperture value and a predetermined shutter value from the storingelement 150 by theaperture module 132 and theshutter module 134 of thecontroller 130. Instep 440, a color level value of each of the pixels of the image is converted into an image gray level value. Instep 450, the predetermined gray level threshold value is adjusted according to the aperture value. Instep 460, a determination is made as to whether one of the image gray level values is greater than the predetermined gray level threshold value, and instep 470, the alarm message is displayed on the screen of the camera if one of the image gray level values is greater than the predetermined gray level threshold value. On the other hand, instep 480, normal information is displayed on the screen of the camera if the image gray level values are all not greater than the predetermined gray level threshold value. Afterstep 470, a position of a pixel with an image gray level value that is greater than the predetermined gray level threshold value is detected, and information of the position is displayed on the screen of the camera instep 490. Hence, a user can perform a dust-disposal process only with respect to the area of the photo-sensitive element 110 on which the dust is present such that the risk of contaminating the photo-sensitive element 110 can be reduced. - For example, it can be determined that there is dust on the photo-
sensitive element 110 if one of the image gray level values is greater than the predetermined gray level threshold value. When this occurs, in order to warn a user to perform a clear process, an alarm message will be displayed on thescreen 140 of thecamera 100. In addition, the gray level threshold value is adjusted according to aperture value due to the fact that there are different standards related to the problem of dust when adopting different apertures. Hence, the embodiment of the present disclosure can adaptively adjust standards related to the problem of dust according to different apertures such that the operation of thecamera 100 is more convenient when thecamera 100 employs the method 400 for checking thecamera 100 of the embodiment of the present disclosure. - Compared with the method 300 for checking a camera as shown if
FIG. 3 , the method 400 for checking a camera described with reference toFIG. 4 further comprisesstep 410 andstep 420. Referring to bothFIG. 1 andFIG. 4 , the method 400 for checking a camera of the embodiment ofFIG. 4 can solve the problem of lost focus generated by capturing an image with the same color scheme (for example, white) through the step of measuring the distance between the object and the camera by thedistance measuring module 170 and performing the focusing process according to the distance instep 420. The image of the object can be captured through theoptical lens 160 of the photo-sensitive element 110. -
FIG. 5 schematically shows a flow diagram of a method 500 for checking a camera according to embodiments of the present disclosure. Reference is now made to bothFIG. 1 andFIG. 5 . Due to the fact that the lost focus problem frequently occurs when capturing an image with the same color scheme (for example, white), the distance between an object and the camera can be measured by thedistance measuring module 170 instep 510 of the embodiment of the present disclosure, and the focusing process can be performed according to the distance instep 520 to solve the problem of lost focus. The image of the object can be captured through theoptical lens 160 of the photo-sensitive element 110. - Referring to step 530, an aperture value and a shutter value of the
optical lens 160 are set by theaperture module 132 and theshutter module 134 of thecontroller 130 respectively. In another embodiment of the present disclosure, the aperture value and the shutter value of theoptical lens 160 are set by obtaining a predetermined aperture value and a predetermined shutter value from the storingelement 150 by theaperture module 132 and theshutter module 134 of thecontroller 130. Hence, the method 500 for checking a camera of the embodiment of the present disclosure is performed to obtain a predetermined parameter value from the storingelement 150 to adjust theoptical lens 160 automatically so as to address the problem of having to perform complex camera set-up processes manually when using a conventional camera in order to check for the presence of dust on a sensor of the camera. - In
step 540, a red level value, a green level value, and a blue level value of each of the pixels of the image can be acquired by thecontroller 130 - In
step 550, a predetermined red level threshold value, a predetermined green level threshold value, and a predetermined blue level threshold value can be adjusted according to the aperture by the input/output interface 120. Instep 560, a determination is made by thecontroller 130 as to whether one of the red level values, the green level values, and the blue level values is greater than a corresponding predetermined red level threshold value, a corresponding predetermined green level threshold value, or a corresponding predetermined blue level threshold value. In addition, the predetermined red level threshold value, the predetermined green level threshold value, and the predetermined blue level threshold value can be adjusted according to the aperture value due to the fact that there are different standards related to the problem of dust when adopting different apertures. Hence, the embodiment of the present disclosure can adaptively adjust standards related to the problem of dust according to different apertures such that the operation of thecamera 100 is more convenient when thecamera 100 employs the method 500 for checking thecamera 100 of the embodiment of the present disclosure. - As mentioned above, if one of the color level values is greater than the corresponding color level threshold value, the alarm message is displayed on the screen of the camera in
step 570. If all of the color level values are less than or equal to the corresponding color level threshold values, normal information is displayed on the screen of the camera instep 580. - For example, it can be determined that there is dust on a photo-
sensitive element 110 if one of the color level values is greater than the corresponding color level threshold value. When this occurs, in order to warn a user to perform a clear process, an alarm message will be displayed on thescreen 140 of thecamera 100. - In
step 590, detection is performed with respect to a position of a pixel with one of a red level value, a green level value, and a blue level value that is greater than the corresponding predetermined red level threshold value, the corresponding predetermined green level threshold value, or the corresponding predetermined blue level threshold value, and information of the position is displayed on the screen of the camera. Hence, a user can perform a dust-disposal process only with respect to the area of the photo-sensitive element 110 on which the dust is present such that the risk of contaminating the photo-sensitive element 110 can be reduced. - Those having skill in the art will appreciate that the method 300, 400, 500 for checking a camera can be performed with software, hardware, and/or firmware. For example, if an implementer determines that speed and accuracy are paramount, the implementer may opt for a mainly hardware and/or firmware implementation; alternatively, if flexibility is paramount, the implementer may opt for a mainly software implementation; or, yet again alternatively, the implementer may opt for some combination of hardware, software, and/or firmware. Those skilled in the art will recognize that optical aspects of implementations will typically employ optically oriented hardware, software, and or firmware.
- In addition, those skilled in the art will appreciate that each of the steps of the method 300, 400, 500 for checking a camera is named in accordance with the function performed in said step, and such naming is merely used to describe the technology in the embodiment of the present disclosure in detail, but the present disclosure is not limited in this regard. Therefore, combining the steps of said method into one step, dividing the steps into several steps, or rearranging the order of the steps is within the scope of the embodiment in the present disclosure.
- In addition, the method 300, 400, 500 for checking a camera and a
camera 100 applying the method of the embodiment of the present disclosure can adaptively adjust standards related to the problem of dust according to different apertures due to the fact that there are different standards related to the problem of dust when adopting different apertures. As a result, the operation of thecamera 100 is more convenient. - It will be understood that the above description of embodiments is given by way of example only and that various modifications may be made by those with ordinary skill in the art. The above specification, examples and data provide a complete description of the structure and use of exemplary embodiments of the disclosure. Although various embodiments of the disclosure have been described above with a certain degree of particularity, or with reference to one or more individual embodiments, those with ordinary skill in the art could make numerous alterations to the disclosed embodiments without departing from the spirit or scope of this disclosure, and the scope thereof is determined by the claims that follow.
Claims (11)
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US13/592,991 US8797443B2 (en) | 2012-03-26 | 2012-08-23 | Method for checking camera |
US14/303,590 US9270984B2 (en) | 2012-03-26 | 2014-06-12 | Camera with dust checking function |
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CN105451017A (en) * | 2015-12-29 | 2016-03-30 | 努比亚技术有限公司 | Camera module photosensitive quality detection method and device |
CN105938088B (en) * | 2016-04-14 | 2019-05-24 | 明基材料有限公司 | The detection method and detection system of the color flaw of contact lenses |
TWI629665B (en) * | 2017-11-24 | 2018-07-11 | 住華科技股份有限公司 | Defect inspection method and defect inspection system |
KR20210046898A (en) | 2019-10-18 | 2021-04-29 | 삼성전자주식회사 | Electronic sytem and image system for measuring particulate matter and method for measuring particulate matter |
CN112165616B (en) * | 2020-11-13 | 2023-05-02 | 歌尔光学科技有限公司 | Camera module testing method and device, electronic equipment and storage medium |
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US9270984B2 (en) | 2016-02-23 |
US20130250127A1 (en) | 2013-09-26 |
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US8797443B2 (en) | 2014-08-05 |
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TWI489861B (en) | 2015-06-21 |
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