CN210377502U - Imaging assembly for shielding ambient light interference - Google Patents
Imaging assembly for shielding ambient light interference Download PDFInfo
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- CN210377502U CN210377502U CN201921616559.1U CN201921616559U CN210377502U CN 210377502 U CN210377502 U CN 210377502U CN 201921616559 U CN201921616559 U CN 201921616559U CN 210377502 U CN210377502 U CN 210377502U
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Abstract
The utility model discloses an imaging component for shielding ambient light interference, which comprises a camera lens, a compensation light source, an image sensor and a processor, wherein the image sensor is arranged between the camera lens and the processor, and the output end of the image sensor is connected with the input end of the processor; the compensation light source has an on state and an off state, and provides compensation light for the image sensor in the on state; the image sensor is used for respectively acquiring a first image signal when the compensation light source is in an open state and acquiring a second image signal when the compensation light source is in a closed state; the processor is used for carrying out CCD photosensitive charge number subtraction operation on the first image signal and the second image signal to obtain an image signal for removing ambient light interference. The utility model discloses a set up one or two image sensor in the imaging assembly to obtain the image of shielding ambient light interference through subtraction, can remove ambient light interference completely.
Description
Technical Field
The utility model relates to an image imaging system field especially relates to a shielding ambient light interference's formation of image subassembly.
Background
In the field of rail transit industry, machine vision safety-keeping systems are distinguished from installation angles, mainly ground-to-vehicle and vehicle-to-ground-to-vehicle systems are arranged on rails to shoot key component images such as the bottom of a vehicle, a side frame part and the top of the vehicle to monitor the state of a train and guarantee the safety of the train, the vehicle-to-ground systems are mainly arranged on the train to shoot steel rails, contact networks and objects beside the rails to guarantee the normal running of the train, the machine vision safety-keeping systems are classified from image angles and are divided into two-dimensional imaging and three-dimensional imaging at present, the two-dimensional imaging is divided into linear array scanning and planar array scanning from the types of cameras, the three-dimensional imaging methods mainly comprise a laser triangulation method and a binocular three-dimensional imaging method, and no matter which method is used for imaging, the.
The existing technology has the following problems of ambient light interference:
1. line-scan two-dimensional or area-scan two-dimensional imaging
When the light source is used outdoors, the light source is used for supplementing light for the camera, but the light source is used in a real use environment as follows: the superposition of the illumination of train lights and sunlight lights causes the overexposure of a camera during shooting;
2. laser triangulation three-dimensional imaging
A beam of laser emitted by a light source irradiates on a plane of an object to be detected, and is finally imaged on a detector through reflection; when the position of the object surface changes, the image it forms is displaced on the detector accordingly. Through the relational expression between image shift and the actual displacement, real object displacement can be obtained by detection and calculation to image shift, consequently, when the camera was when gathering own line laser, if have the sun or come with the light irradiation of line laser with the spectrum, other faculas will be shot to the camera, consequently, the camera will make mistakes when extracting every light spot on the line of linear array laser, and then the difference can appear in the position of far and near.
The current common method of the technology is to increase the brightness of the laser, reduce the exposure time of the camera, and increase the threshold value of the camera to remove the ambient light, but the following reasons cannot be solved all the time: (1) the power of the laser is greatly increased, so that the risk of safety factor exists, the brightness of the laser is stronger than that of direct sunlight, a light source is difficult to manufacture, and the size of the laser is large; (2) a detection shed (with high price) is installed in the used outdoor environment, so that direct sunlight is avoided, the brightness of the laser is properly enhanced, and the threshold value is increased to remove the light interference below the brightness of the laser.
Ambient light interference affects the imaging as follows: (1) the imaging effect is that when light interference exists, the two-dimensional image has an overexposure phenomenon, so people cannot see the real state of train components clearly, and potential safety hazards caused by train running due to the fault leakage phenomenon may exist. (2) The image recognition effect, along with the introduction of the machine vision imaging technology, the original train detection is changed from outdoor manual train inspection into indoor train inspection and overhaul by looking at pictures, but in recent years, the train is greatly accelerated for six times, the number of motor train units and subways is continuously increased, the supply of railway personnel is not in demand, and the original detection mode by looking at pictures cannot meet the requirements, so that the hope of solving the image recognition is brought to the intelligent train image recognition due to the intervention of three-dimensional imaging in recent years. First equipment is installed in the big-arch shelter and is verified experimental effect better, but outdoors, especially when shooting car shoulder, roof and contact net, there is the direct sunlight problem inevitable, even, for solving this problem on the railway, the detection car can only detect evening, and leads to efficiency greatly reduced.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem that exists among the prior art, the utility model provides a shielding ambient light disturbs formation of image subassembly, it can remove ambient light completely and disturb, technical scheme is as follows:
the utility model provides an imaging component for shielding ambient light interference, which comprises a camera lens, a compensation light source, an image sensor and a processor,
the image sensor is arranged between the camera lens and the processor, and the output end of the image sensor is connected with the input end of the processor;
the compensation light source has an on state and an off state, and provides compensation light for the image sensor in the on state;
the image sensor is used for acquiring a first image signal when the compensation light source is in an open state and acquiring a second image signal when the compensation light source is in a closed state;
the processor is used for carrying out CCD photosensitive charge number subtraction operation on the first image signal and the second image signal to obtain an image signal for removing ambient light interference.
Further, the imaging assembly further comprises an optical filter, and the optical filter is arranged on an optical path between the camera lens and the image sensor.
Furthermore, the imaging assembly further comprises an optical filter, and the optical filter is arranged in front of the light incidence side of the camera lens.
Furthermore, the imaging assembly for shielding the ambient light interference further comprises a display assembly, and the output end of the processor is connected with the input end of the display assembly.
Further, the difference between the acquisition time of the first image signal and the acquisition time of the second image signal is smaller than a preset time threshold.
Further, the compensation light source is a laser or an LED.
Further, the processor comprises a subtraction module and a data conversion module, wherein the subtraction module is used for performing subtraction of CCD photosensitive charge numbers on a first image signal and a second image signal acquired by the image sensor to obtain an image without ambient light interference, and outputting an electric signal of the image without ambient light interference; the data conversion module is used for converting the electric signals into a data format which can be displayed by the display component.
The utility model also discloses an imaging component for shielding the ambient light interference, which comprises a camera lens, a beam splitter, a compensation light source, a first image sensor, a second image sensor and a processor,
the light splitting sheet is arranged between the camera lens and the processor, light passes through the light splitting sheet to form a first light path and a second light path, the first image sensor is arranged on the first light path, and the second image sensor is arranged on the second light path; the output end of the first image sensor and the output end of the second image sensor are both connected with a processor;
the compensation light source has an on state and an off state, and provides compensation light for the first image sensor and the second image sensor in the on state;
the first image sensor is used for acquiring a first image signal when the compensation light source is in an open state;
the second image sensor is used for acquiring a second image signal when the compensation light source is in a closed state; the acquisition angles of the first image sensor and the second image sensor are consistent;
the processor is used for carrying out CCD photosensitive charge number subtraction operation on the first image signal and the second image signal to obtain an image signal for removing ambient light interference.
Furthermore, an optical filter is arranged in front of the light incidence side of the camera lens.
Further, an optical filter is arranged on a light path between the camera lens and the light splitting sheet.
Further, a first optical filter is arranged on a first light path between the light splitter and the first image sensor, and a second optical filter is arranged on a second light path between the light splitter and the second image sensor.
Further, an included angle between the first light path and the second light path is 90 degrees.
Furthermore, the imaging assembly for shielding the ambient light interference further comprises a display assembly, and the output end of the processor is connected with the input end of the display assembly.
Further, the difference between the acquisition time of the first image signal and the acquisition time of the second image signal is smaller than a preset time threshold.
Further, the compensation light source is a laser or an LED.
Further, the processor comprises a subtraction module and a data conversion module,
the subtraction module is used for performing subtraction of CCD photosensitive charge number on a first image signal and a second image signal acquired by the image sensor to obtain an image without ambient light interference and outputting an electric signal of the image without ambient light interference;
the data conversion module is used for converting the electric signals into a data format which can be displayed by the display component.
The utility model also discloses an imaging component for shielding the ambient light interference, which comprises a camera lens, a light filter, a beam splitter, a compensation light source, a first image sensor, a second image sensor, a processor and a display component,
the optical filter is arranged on an optical path between the camera lens and the light splitting sheet, and the output end of the first image sensor and the output end of the second image sensor are both connected with the processor;
the light passes through the light splitting sheet to form a first light path and a second light path, the first image sensor is arranged on the first light path, and the second image sensor is arranged on the second light path;
the compensation light source has an on state and an off state, and provides compensation light for the first image sensor and the second image sensor in the on state;
the first image sensor is used for acquiring a first image signal when the compensation light source is in an open state;
the second image sensor is used for acquiring a second image signal when the compensation light source is in a closed state; the acquisition angles of the first image sensor and the second image sensor are consistent;
the processor is used for carrying out CCD photosensitive charge number subtraction operation on the first image signal and the second image signal to obtain an image signal for removing ambient light interference.
Furthermore, the imaging assembly for shielding the ambient light interference further comprises a display assembly, and the output end of the processor is connected with the input end of the display assembly.
Further, the difference between the acquisition time of the first image signal and the acquisition time of the second image signal is smaller than a preset time threshold.
Further, the compensation light source is a laser or an LED.
Further, the processor comprises a subtraction module and a data conversion module, wherein the subtraction module is used for performing subtraction of CCD photosensitive charge numbers on a first image signal and a second image signal acquired by the image sensor to obtain an image without ambient light interference, and outputting an electric signal of the image without ambient light interference; the data conversion module is used for converting the electric signals into a data format which can be displayed by the display component.
The utility model provides a beneficial effect that technical scheme brought as follows:
the utility model discloses an image sensor or two image sensor set up in the imaging assembly to can obtain the image that shields the ambient light interference through subtraction, can remove the ambient light interference completely.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic diagram of an imaging assembly for shielding ambient light interference according to an embodiment of the present invention capturing laser lines and sun or ambient light;
fig. 2 is a schematic diagram of an imaging assembly for shielding ambient light interference according to an embodiment of the present invention capturing sun or ambient light;
fig. 3 is a schematic diagram of the imaging assembly for shielding ambient light interference according to the embodiment of the present invention after subtraction is performed on fig. 1 and fig. 2;
fig. 4 is a first structural diagram of an imaging assembly for shielding ambient light interference according to an embodiment of the present invention;
fig. 5 is a second structural diagram of an imaging assembly for shielding ambient light interference according to an embodiment of the present invention;
fig. 6 is a third structural diagram of an imaging assembly for shielding ambient light interference according to an embodiment of the present invention;
fig. 7 is a fourth structural diagram of an imaging assembly for shielding ambient light interference according to an embodiment of the present invention;
fig. 8 is a fifth structural diagram of an imaging assembly for shielding ambient light interference according to an embodiment of the present invention;
fig. 9 is a sixth structural diagram of an imaging assembly for shielding ambient light interference according to an embodiment of the present invention;
fig. 10 is a seventh structure diagram of an imaging assembly for shielding ambient light interference according to an embodiment of the present invention.
Wherein the reference numerals include: the image sensor comprises a camera lens 1, a camera lens 2, a light filter 3, a compensation light source 4, an image sensor 5, a processor 6, a display assembly 7, a light splitting sheet 8, a first image sensor 9, a second image sensor 10, a first light filter 11 and a second light filter 11.
Detailed Description
In order to make the technical solution of the present invention better understood, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, apparatus, article, or device that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or device.
The measured object has static state and moving state, and under two kinds of states, can shoot through the imaging element who shields the ambient light interference that this application provided and get and remove ambient light interference image, the principle explanation is as follows:
in the first case: when the measured object is static, the camera is exposed fast and continuously, and the possibility of the change of the ambient light is regarded as 0 due to the fast and continuous exposure of the camera, the two photographed images are as shown in fig. 1 (the camera photographs a laser line and the sun or ambient light) and fig. 2 (the camera photographs only the sun or the ambient light), because the measured object is static, the measured object in the two images does not move, the corresponding coordinates of the two images are subtracted to obtain a diagram 3 (the diagrams in fig. 1, fig. 2 and fig. 3 are schematic diagrams), and only the laser line and no sun or ambient light are shown in fig. 3, which shows that the imaging component is used for shielding the ambient light interference and obtaining an image shielding the ambient light interference.
In the second case: when the measured object (such as a high-speed train) moves, because the camera adopts a high-speed camera, the connected exposure frequency is within 20US, when the running speed of the high-speed train is up to 300KM/H, the length of 1 second is about 83 meters, the length of 1ms is about 83mm, and the length of 20US train is about 1.6mm, in the image algorithm, the error is basically not influenced, and because the time is short, the measured object can be regarded as static, and the same is the first situation described above.
When the storage time is needed for shooting by the individual camera, the cameras cannot be exposed continuously and quickly, so that the shooting cannot be performed after the train moves far, and therefore the shooting cannot be performed.
Example 1
In an embodiment of the present invention, an imaging assembly for shielding ambient light interference is provided, which is applied to various fields, such as the rail transit vehicle industry, and the specific structure is shown in fig. 4, including a camera lens 1, a compensation light source 3, an image sensor 4, a processor 5 and a display assembly 6, where the compensation light source 3 is a laser or an LED, and when the imaging assembly is applied to the rail transit industry, the image sensor faces a rail transit vehicle, and a space angle is formed between the light source 1 and the image sensor; the image sensor 4 is arranged between the camera lens 1 and the processor 5, the output end of the image sensor is connected with the input end of the processor 5, the output end of the processor 5 is connected with the input end of the display component 6, and the display component 6 comprises a display connected with the processor 5.
The compensation light source 3 has an on-state and an off-state, which provides compensation light for the image sensor 4 in the on-state; the image sensor 4 is configured to collect a first image signal when the compensation light source 3 is in an on state and collect a second image signal when the compensation light source 3 is in an off state (the compensation light source is turned off within a preset time threshold range, and the image sensor 4 collects the second image signal), where the first image signal includes the number of CCD photosensitive charges at each pixel position, and the second image signal includes the number of CCD photosensitive charges at each pixel position; the processor 5 is configured to perform CCD photosensitive charge number subtraction on the first image signal and the second image signal to obtain an image signal without ambient light interference, specifically, subtract the CCD photosensitive charge number of each pixel position in the first image signal from the CCD photosensitive charge number of the corresponding pixel position in the second image signal to obtain a CCD photosensitive charge number difference value of the corresponding pixel position, and obtain the image signal without ambient light interference according to the CCD photosensitive charge number difference value of the corresponding pixel position. The processor 5 comprises a subtraction module and a data conversion module, wherein the subtraction module is used for performing subtraction of CCD photosensitive charge numbers on a first image signal and a second image signal acquired by an image sensor to obtain an image without ambient light interference, and outputting an electric signal without the image with the ambient light interference; the data conversion module is used for converting the electric signals into a data format which can be displayed by the display component.
Or, the compensation light source is closed firstly, the image sensor is used for collecting a first image signal, then the compensation light source is opened within a preset time threshold range, the image sensor is used for collecting a second image signal, and then CCD photosensitive charge number subtraction operation is carried out on the first image signal and the second image signal to obtain an image signal without ambient light interference.
When the object to be measured is static, the image without the ambient light interference is obtained through shooting by the scheme, and the image is not influenced by time; when the measured object moves, the difference between the acquisition time of the first image signal and the acquisition time of the second image signal is smaller than a preset time threshold, and the measured object can be regarded as static when the moving speed of the measured object is higher and the preset time threshold is smaller; in one embodiment, the predetermined time threshold is 20 Us.
The image sensor and the CCD photosensitive charge number are explained, and the concrete steps are as follows: CCD image sensor CCD is made of semiconductor material with high light sensitivity, and can convert light into electric charge and convert the electric charge into digital signal via A/D converter chip, and the digital signal is compressed and stored in flash memory or hard disc card inside camera, so that the data may be transferred to computer easily and the image may be modified as required. A CCD consists of many photosites, usually in mega pixels. When the CCD surface is irradiated by light, each photosensitive unit reflects charges on the component, and signals generated by all the photosensitive units are added together to form a complete picture.
Example 2
In another embodiment of the present invention, an imaging assembly for shielding ambient light interference is provided, which is applied to various fields, such as the rail transportation vehicle industry, and the specific structure is shown in fig. 5, including a camera lens 1, an optical filter 2, a compensation light source 3, an image sensor (CCD), a processor 5 and a display assembly 6, where the compensation light source 3 is a laser or an LED, and when the imaging assembly is applied to the rail transportation industry, the image sensor faces a rail transportation vehicle, and a space angle is formed between the light source 1 and the image sensor; embodiment 2 differs from embodiment 1 in that an optical filter is added, the optical filter 2 is disposed in front of the light incident side of the camera lens 1, the output end of the image sensor is connected to the input end of the processor 5, the output end of the processor 5 is connected to the input end of the display module 6, and the display module 6 includes a display connected to the processor 5. The optical filter is used for filtering stray light, is selected according to the spectrum of the compensation light source, and determines different optical filters according to specific requirements.
Example 3
In another embodiment of the present invention, an imaging assembly for shielding ambient light interference is provided, which is applied to various fields, such as the rail transportation vehicle industry, and the specific structure is shown in fig. 6, including a camera lens 1, an optical filter 2, a compensation light source 3, an image sensor (CCD), a processor 5 and a display assembly 6, where the compensation light source 3 is a laser or an LED, and when the imaging assembly is applied to the rail transportation industry, the image sensor faces a rail transportation vehicle, and a space angle is formed between the light source 1 and the image sensor; embodiment 3 differs from embodiment 1 in that an optical filter is added, the optical filter 2 is disposed on an optical path between the camera lens 1 and the image sensor 4, an output of the image sensor is connected to an input of a processor 5, an output of the processor 5 is connected to an input of a display assembly 6, and the display assembly 6 includes a display connected to the processor 5. The optical filter is used for filtering stray light, is selected according to the spectrum of the compensation light source, and determines different optical filters according to specific requirements.
Example 4
In a further embodiment of the present invention, an imaging assembly for shielding ambient light interference is provided, which is applied to various fields, such as the rail transit vehicle industry, and the specific structure is shown in fig. 7, where the imaging assembly includes a camera lens 1, a beam splitter 7, a compensation light source 3, a first image sensor 8, a second image sensor 9, a processor 5 and a display assembly 6, the compensation light source 3 is a laser or an LED, when the imaging assembly is applied to the rail transit industry, the first image sensor 8 and the second image sensor 9 both face a rail transit vehicle, and a spatial angle is formed between the light source 1 and the first image sensor 8 and the second image sensor 9; the light splitting sheet 7 is arranged between the camera lens 1 and the processor 5, the light passes through the light splitting sheet 7 to form a first light path and a second light path, the first image sensor 8 is arranged on the first light path, the second image sensor 9 is arranged on the second light path, and the included angle between the first light path and the second light path is preferably 90 degrees; the output end of the first image sensor 8 and the output end of the second image sensor 9 are both connected with the processor 5;
the compensation light source 3 has an on-state and an off-state, which in the on-state provides compensation light for both the first image sensor 8 and the second image sensor 9; the first image sensor 8 is used for acquiring a first image signal when the compensation light source 3 is in an on state; the second image sensor 9 is configured to acquire a second image signal when the compensation light source 3 is in an off state, where the first image signal includes the number of CCD photosensitive charges at each pixel position, and the second image signal includes the number of CCD photosensitive charges at each pixel position; the processor 5 is configured to perform CCD photosensitive charge number subtraction on the first image signal and the second image signal to obtain an image signal without ambient light interference, specifically, subtract the CCD photosensitive charge number of each pixel position in the first image signal from the CCD photosensitive charge number of the corresponding pixel position in the second image signal to obtain a CCD photosensitive charge number difference value of the corresponding pixel position, and obtain the image signal without ambient light interference according to the CCD photosensitive charge number difference value of the corresponding pixel position; preferably, the first image sensor and the second image sensor have the same collection angle, the collection angle refers to the angle of the first image sensor and the second image sensor towards the measured object, the consistent collection angle can ensure that the images of the measured object are shot consistently, and the processor can conveniently perform CCD photosensitive charge number subtraction operation on the first image signal and the second image signal to obtain the image signal for removing the ambient light interference.
The processor 5 comprises a subtraction module and a data conversion module, wherein the subtraction module is used for performing subtraction of CCD photosensitive charge numbers on a first image signal and a second image signal acquired by a first image sensor to obtain an ambient light interference removing image and outputting an electric signal of the ambient light interference removing image; the data conversion module is used for converting the electric signals into a data format which can be displayed by the display component.
Or, the compensation light source is closed firstly, the first image sensor is used for collecting the first image signal, then the compensation light source is opened within a preset time threshold range, the second image sensor is used for collecting the second image signal, and then CCD photosensitive charge number subtraction operation is carried out on the first image signal and the second image signal to obtain the image signal without the ambient light interference.
Further, the imaging assembly further includes an optical filter, the setting position of the optical filter is three structures, and the first position is that the optical filter 2 is arranged in front of the light incident side of the camera lens 1, specifically referring to fig. 8. The second position is where the filter 2 is disposed in the optical path between the camera lens 1 and the beam splitter 7, see fig. 10 in particular. The third position is that a first optical filter 10 is disposed on a first optical path between the spectroscope 7 and the first image sensor 8, and a second optical filter 11 is disposed on a second optical path between the spectroscope 7 and the second image sensor 9, see fig. 9 in particular. The optical filter is selected according to the spectrum of the compensation light source, and different optical filters are determined according to specific requirements.
When the object to be measured is static, the image without the ambient light interference is obtained through shooting by the scheme, and the image is not influenced by time; when the measured object moves, the acquisition time difference between the first image signal and the second image signal is smaller than a preset time threshold, and the measured object can be regarded as static when the moving speed of the measured object is higher and the preset time threshold is smaller.
The difference between the embodiment 4 and the embodiments 1-3 is the number of the image sensors, 1 image sensor is provided in the embodiments 1-3, 2 image sensors are provided in the embodiment 4, and when 1 image sensor exists, the storage time is affected by two times of shooting, so that the requirement on the camera is high, and a high-speed camera is needed; the other 1 image sensor ensures that the angles of the two-time shooting of the measured object are completely consistent; when two image sensors are arranged, the influence of the two-time shooting and storage time is small, the time gap between two-time acquisition is negligible, continuous and rapid exposure can be realized, and the requirement on a camera is low; the angles of the two other image sensors for shooting the measured object twice may have deviation, so it is necessary to ensure that the acquisition angles of the first image sensor and the second image sensor are consistent to reduce the influence of the deviation.
Example 4 in the present application is further explained as follows:
adopt two image sensor in embodiment 4 of this application, when light got into the camera lens, it is unanimous to make the influence of the object scene that two cameras were shot and ambient light unanimous through the beam splitting, and the device need guarantee simultaneously that two image sensor models sensitization are all unanimous, and the parameter that two image sensor set up of use is all unanimous, and concrete the signal is as follows: turning on a light source, turning off the light source, stopping acquisition by the first image sensor, and exposing and acquiring by the second camera independently as shown in fig. 2 (the camera only shoots the sun or the ambient light) when the first image sensor shoots a moving or static object, and finally subtracting to obtain an image which is shown in fig. 3, only has laser lines and does not have the sun or the ambient light, and the imaging component shields the ambient light interference and obtains the image shielding the ambient light interference.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (16)
1. An imaging assembly for shielding ambient light interference, which is characterized by comprising a camera lens (1), a compensation light source (3), an image sensor (4) and a processor (5),
the image sensor (4) is arranged between the camera lens (1) and the processor (5), and the output end of the image sensor is connected with the input end of the processor (5);
the compensation light source (3) has an on-state and an off-state, which in the on-state provides compensation light for the image sensor (4);
the image sensor (4) is used for respectively acquiring a first image signal when the compensation light source (3) is in an open state and acquiring a second image signal when the compensation light source (3) is in a closed state;
and the processor (5) is used for carrying out CCD photosensitive charge number subtraction operation on the first image signal and the second image signal to obtain an image signal for removing ambient light interference.
2. The imaging assembly shielded from ambient light interference according to claim 1, further comprising a filter (2), the filter (2) being disposed in an optical path between the camera lens (1) and the image sensor (4).
3. The imaging assembly of claim 1, further comprising a filter (2), wherein the filter (2) is disposed in front of the light incident side of the camera lens (1).
4. An imaging assembly shielded from ambient light interference according to any of claims 1-3, further comprising a display assembly (6), wherein an output of the processor (5) is connected to an input of the display assembly (6).
5. The ambient light interference shielded imaging assembly of any of claims 1-3 wherein the difference in acquisition time of the first and second image signals is less than a preset time threshold.
6. An imaging assembly shielded from ambient light interference according to any of claims 1-3, characterized in that the compensating light source (3) is a laser or an LED.
7. An imaging assembly shielded from ambient light interference according to any of claims 1-3, characterized in that the processor (5) comprises a subtraction module and a data conversion module,
the subtraction module is used for performing subtraction of CCD photosensitive charge number on a first image signal and a second image signal acquired by the image sensor to obtain an image without ambient light interference and outputting an electric signal of the image without ambient light interference;
the data conversion module is used for converting the electric signals into a data format which can be displayed by the display component.
8. An imaging assembly for shielding ambient light interference is characterized by comprising a camera lens (1), a beam splitter (7), a compensation light source (3), a first image sensor (8), a second image sensor (9) and a processor (5),
the light splitting sheet (7) is arranged between the camera lens (1) and the processor (5), light passes through the light splitting sheet (7) to form a first light path and a second light path, the first image sensor (8) is arranged on the first light path, and the second image sensor (9) is arranged on the second light path; the output end of the first image sensor (8) and the output end of the second image sensor (9) are both connected with a processor (5);
the compensation light source (3) has an on-state and an off-state, which in the on-state provides compensation light for both the first image sensor (8) and the second image sensor (9);
the first image sensor (8) is used for acquiring a first image signal when the compensation light source (3) is in an open state;
the second image sensor (9) is used for acquiring a second image signal when the compensation light source (3) is in an off state; the acquisition angles of the first image sensor and the second image sensor are consistent;
and the processor (5) is used for carrying out CCD photosensitive charge number subtraction operation on the first image signal and the second image signal to obtain an image signal for removing ambient light interference.
9. Imaging assembly shielded from ambient light interference according to claim 8, characterized in that a filter (2) is arranged in front of the light entrance side of the camera lens (1).
10. The imaging assembly for shielding ambient light interference according to claim 8, wherein a filter (2) is disposed on the light path between the camera lens (1) and the beam splitter (7).
11. The imaging assembly according to claim 8, wherein a first optical filter (10) is arranged on a first optical path between the beam splitter (7) and the first image sensor (8), and a second optical filter (11) is arranged on a second optical path between the beam splitter (7) and the second image sensor (9).
12. An imaging assembly according to claim 9, wherein the angle between the first and second optical paths is 90 degrees.
13. An ambient light interference shielded imaging assembly according to any of claims 8-12, further comprising a display assembly (6), wherein an output of the processor (5) is connected to an input of the display assembly (6).
14. The ambient light interference shielded imaging assembly of any of claims 8-12 wherein the difference in acquisition time of the first and second image signals is less than a preset time threshold.
15. Imaging assembly shielded from ambient light interference according to any of claims 8-12, characterized in that the compensating light source (3) is a laser or an LED.
16. Imaging assembly shielded from ambient light interference according to any of claims 8-12, characterized in that the processor (5) comprises a subtraction module and a data conversion module,
the subtraction module is used for performing subtraction of CCD photosensitive charge number on a first image signal and a second image signal acquired by the image sensor to obtain an image without ambient light interference and outputting an electric signal of the image without ambient light interference;
the data conversion module is used for converting the electric signals into a data format which can be displayed by the display component.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111923041A (en) * | 2020-07-21 | 2020-11-13 | 天津师范大学 | Mechanical arm optical guiding system capable of automatically shielding external light source interference |
| CN112422853A (en) * | 2020-11-19 | 2021-02-26 | 苏州新晶腾光电科技有限公司 | Stray light resisting method of image sensing chip |
| CN112731419A (en) * | 2020-12-23 | 2021-04-30 | 河南中原光电测控技术有限公司 | Distance measuring instrument, distance measuring equipment for measuring plate cutting length, filtering method and application |
| CN112804447A (en) * | 2020-12-30 | 2021-05-14 | 北京石头世纪科技股份有限公司 | Method, device, medium and electronic equipment for detecting near-field object |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111923041A (en) * | 2020-07-21 | 2020-11-13 | 天津师范大学 | Mechanical arm optical guiding system capable of automatically shielding external light source interference |
| CN112422853A (en) * | 2020-11-19 | 2021-02-26 | 苏州新晶腾光电科技有限公司 | Stray light resisting method of image sensing chip |
| CN112731419A (en) * | 2020-12-23 | 2021-04-30 | 河南中原光电测控技术有限公司 | Distance measuring instrument, distance measuring equipment for measuring plate cutting length, filtering method and application |
| CN112804447A (en) * | 2020-12-30 | 2021-05-14 | 北京石头世纪科技股份有限公司 | Method, device, medium and electronic equipment for detecting near-field object |
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