CN114157788A - Method for solving focusing failure of camera shooting of special texture shape, camera shooting module and shooting device - Google Patents
Method for solving focusing failure of camera shooting of special texture shape, camera shooting module and shooting device Download PDFInfo
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- CN114157788A CN114157788A CN202111448175.5A CN202111448175A CN114157788A CN 114157788 A CN114157788 A CN 114157788A CN 202111448175 A CN202111448175 A CN 202111448175A CN 114157788 A CN114157788 A CN 114157788A
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- 238000001914 filtration Methods 0.000 claims description 10
- 238000003384 imaging method Methods 0.000 claims description 10
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- 230000009286 beneficial effect Effects 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
- H04N23/54—Mounting of pick-up tubes, electronic image sensors, deviation or focusing coils
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/67—Focus control based on electronic image sensor signals
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Abstract
The invention discloses a method for solving focusing failure of a camera for shooting special texture shapes, which adopts a dual-core focusing image sensor, wherein each focusing pixel of the dual-core focusing image sensor is provided with two photodiodes, one part of the focusing pixels is a vertically-divided focusing pixel, namely, one focusing pixel is divided into two vertical sub-pixels, the other part of the focusing pixels is a horizontally-divided focusing pixel, namely, one focusing pixel is divided into two horizontal sub-pixels, and rapid focusing is carried out by reading phase difference information of the two vertical sub-pixels in each focusing pixel and phase difference information of the two horizontal sub-pixels in each focusing pixel. The invention changes the focusing structure of the image sensor, so that the focusing pixels adopting phase focusing can obtain obviously different phase images, thereby realizing rapid focusing and preventing focusing failure.
Description
Technical Field
The invention belongs to the technical field of camera shooting, and particularly relates to a method for solving focusing failure of a camera shooting special texture shape, a camera shooting module and a shooting device.
Background
The camera is used as an image input device, is widely applied to the fields of camera shooting, mobile phone video, security monitoring and the like, and obtains people in the thousands of worlds, and information such as scenery is obtained by the camera module. The focusing speed is high and low, the influence of the accuracy on the imaging quality is great, especially, in recent years, the focusing of a new mobile phone is taken as a selling point of great propaganda, the camera module is improved by algorithms of many generations on the aspect of acquiring a clear picture more quickly, and the focusing is carried out from the former common focusing, phase focusing and then double-pixel focusing, however, at the same time of improving the focusing speed, a certain limit scene with focusing failure still exists because of detecting the phase difference of left and right images, as shown in fig. 1, for example, when a special texture shape is shot. Through the cutting mode of pixel adjustment on the sensitization chip, this problem can be fine solution to the scheme that the special texture shape of camera focusing failed.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a method, a camera module and a camera device for solving the focusing failure of the camera shooting of special texture shapes, and the problem of focusing failure of the shooting of special texture shapes is thoroughly solved by adjusting the pixel cutting mode of an image sensor chip.
In order to solve the problems, the technical scheme adopted by the invention is as follows:
a method for solving focusing failure of a camera for shooting special texture shapes adopts a dual-core focusing image sensor, each focusing pixel of the dual-core focusing image sensor is provided with two photodiodes, one part of the focusing pixels is a vertical division focusing pixel, namely one focusing pixel is divided into two vertical sub-pixels, the other part of the focusing pixels is a horizontal division focusing pixel, namely one focusing pixel is divided into two horizontal sub-pixels, and rapid focusing is carried out by reading phase difference information of the two vertical sub-pixels in each focusing pixel and phase difference information of the two horizontal sub-pixels in each focusing pixel.
Furthermore, the image sensor comprises a photosensitive unit array, a filtering unit array and a micro lens array, wherein the photosensitive unit array is composed of a plurality of pixels, one pixel is a photosensitive unit, each pixel corresponds to one filtering unit and one micro lens, and the pixel for focusing is a focusing pixel.
Furthermore, the focusing pixels form focusing units, each focusing unit comprises four focusing pixels, the four focusing pixels are arranged in a bayer arrangement mode, and two adjacent focusing pixels are respectively a vertical division focusing pixel and a horizontal division focusing pixel.
Furthermore, a part of pixels of the image sensor are focusing pixels and form a plurality of focusing units for focusing and imaging, and the rest pixels are used for imaging.
Furthermore, all pixels of the image sensor are focusing pixels and form a plurality of focusing units for focusing and imaging.
Furthermore, a part of focusing pixels of the image sensor form a dark state focusing unit, each dark state focusing unit is formed by 4 × 4 adjacent focusing pixels, four adjacent focusing pixels are in one group and are in four groups, all four focusing pixels of each group are vertically-divided focusing pixels or horizontally-divided focusing pixels, and vertically-divided focusing pixels and horizontally-divided focusing pixels are respectively arranged between the adjacent groups of the four groups.
Furthermore, the light filtering units corresponding to the four pixels forming one group are of the same color, and the light filtering units are arranged among the four groups according to a Bayer arrangement mode.
Furthermore, the phase difference of the read vertically-divided focusing pixels is a first phase difference, the phase difference of the read horizontally-divided focusing pixels is a second phase difference, and the focusing program carries out focusing according to the first phase difference and/or the second phase difference.
A camera module adopts the image sensor of any one of the above technical schemes.
A shooting device comprises the image sensor in any technical scheme, and the method for solving the problem that the camera fails to shoot the special texture and shape in focusing is adopted to shoot an image in focusing.
Adopt the produced beneficial effect of above-mentioned technical scheme to lie in:
the invention changes the focusing structure of the image sensor, so that the focusing pixels adopting phase focusing can obtain obviously different phase images, thereby realizing rapid focusing and preventing focusing failure.
Drawings
FIG. 1 is a schematic diagram of a focus failure scenario;
FIG. 2 is a schematic diagram of a focusing unit of the image sensor according to the present invention;
FIG. 3 is a schematic diagram of a dark focusing unit of the image sensor according to the present invention;
wherein: 1. vertical sub-pixel, 2, horizontal sub-pixel, 10, focusing unit, 20, dark state focusing unit.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention relates to a method for solving focusing failure of shooting special texture shapes by a camera, a camera module and a shooting device, wherein the method comprises the following steps: the method comprises the steps of adopting a dual-core focusing image sensor, wherein each focusing pixel of the dual-core focusing image sensor is provided with two photodiodes, one part of the focusing pixels is a vertical dividing focusing pixel, namely one focusing pixel is divided into two vertical sub-pixels, the other part of the focusing pixels is a horizontal dividing focusing pixel, namely one focusing pixel is divided into two horizontal sub-pixels, and fast focusing is carried out by reading phase difference information of the two vertical sub-pixels in each focusing pixel and phase difference information of the two horizontal sub-pixels in each focusing pixel.
For the invention, the image sensor comprises a photosensitive unit array, a filter unit array and a micro-lens array, wherein the photosensitive unit array consists of a plurality of pixels, one pixel is a photosensitive unit, each pixel corresponds to one filter unit and one micro-lens, and the pixel for focusing is a focusing pixel.
As shown in fig. 2, the focusing pixels form focusing units 10, each focusing unit 10 includes four focusing pixels, the four focusing pixels are arranged in a bayer arrangement, that is, a conventional pixel arrangement is adopted, and two adjacent focusing pixels are respectively a vertically divided focusing pixel and a horizontally divided focusing pixel. The vertically divided focusing pixel is divided into 2 vertical sub-pixels 1, and the horizontally divided focusing pixel is divided into 2 horizontal sub-pixels 2. The focusing pixels are arranged in a Bayer arrangement mode, namely one pair of corner pixels of the four pixels are respectively a blue channel and a red channel, and the other pair of corner pixels are green channels, so that the arrangement is favorable for receiving and processing image data by a back-end processor, and the time consumed for solving the data before outputting is less.
As one of the preferred embodiments of the present invention, a part of the pixels of the image sensor are focusing pixels and constitute several focusing units for focusing and imaging, and the rest of the pixels are used for imaging.
As another preferred embodiment of the present invention, all pixels of the image sensor are focusing pixels and constitute several focusing units for focusing and imaging.
Because under the dark state environment, the light inlet quantity reduces, influences focusing performance, in order to promote the light inlet quantity and the focusing performance of the module of making a video recording. As shown in fig. 3, the focusing pixels of the image sensor according to the present invention may form a dark-state focusing unit 20 after reaching a preset ambient brightness or being manually set, each dark-state focusing unit is formed by 4 × 4 adjacent focusing pixels, four adjacent focusing pixels are in one group, which are four groups, all four focusing pixels of each group are vertically divided focusing pixels or horizontally divided focusing pixels, and adjacent groups of four groups are respectively vertically divided focusing pixels and horizontally divided focusing pixels, that is, four pixels forming one group are all vertically divided focusing pixels or horizontally divided focusing pixels. The light filtering units corresponding to the four pixels forming one group are of the same color, and the light filtering units are arranged among the four groups according to a Bayer arrangement mode. After the arrangement, four pixels are used for synthesizing a pixel with a larger size, so that the focusing time is shortened, the noise of a low-illumination image and a video is reduced, the details are reserved, and the dynamic range is improved.
According to the invention, the phase difference of the read vertically-divided focusing pixels is a first phase difference, the phase difference of the read horizontally-divided focusing pixels is a second phase difference, and the focusing program carries out focusing according to the first phase difference and/or the second phase difference.
The invention also provides a camera module, and the image sensor adopting the technical scheme.
The invention also provides a shooting device which comprises the image sensor in the technical scheme, and the method for solving the problem of focusing failure of the camera shooting the special texture shape is adopted to shoot the image in a focusing manner.
Claims (10)
1. A method for solving the focusing failure of a camera shooting special texture shapes is characterized in that: the method comprises the steps of adopting a dual-core focusing image sensor, wherein each focusing pixel of the dual-core focusing image sensor is provided with two photodiodes, one part of the focusing pixels is a vertical dividing focusing pixel, namely one focusing pixel is divided into two vertical sub-pixels, the other part of the focusing pixels is a horizontal dividing focusing pixel, namely one focusing pixel is divided into two horizontal sub-pixels, and fast focusing is carried out by reading phase difference information of the two vertical sub-pixels in each focusing pixel and phase difference information of the two horizontal sub-pixels in each focusing pixel.
2. The method for solving the focus failure of the camera to shoot the special texture shape according to claim 1, wherein: the image sensor comprises a photosensitive unit array, a filtering unit array and a micro-lens array, wherein the photosensitive unit array is composed of a plurality of pixels, one pixel is a photosensitive unit, each pixel corresponds to one filtering unit and one micro-lens, and the pixel for focusing is a focusing pixel.
3. The method for solving the focus failure of the camera to shoot the special texture shape according to claim 2, wherein: the focusing pixels form focusing units, each focusing unit comprises four focusing pixels, the four focusing pixels are arranged in a Bayer arrangement mode, and two adjacent focusing pixels are respectively a vertical division focusing pixel and a horizontal division focusing pixel.
4. The method for solving the focus failure of the camera to shoot the special texture shape according to claim 3, wherein: a part of pixels of the image sensor are focusing pixels and form a plurality of focusing units for focusing and imaging, and the rest pixels are used for imaging.
5. The method for solving the focus failure of the camera to shoot the special texture shape according to claim 3, wherein: all pixels of the image sensor are focusing pixels and form a plurality of focusing units for focusing and imaging.
6. The method for solving the focus failure of the camera to shoot the special texture shape according to any one of claims 1 to 5, wherein: a part of focusing pixels of the image sensor form dark state focusing units, each dark state focusing unit is composed of 4 × 4 adjacent focusing pixels, four adjacent focusing pixels are in one group and are four groups in total, all four focusing pixels of each group are vertically divided focusing pixels or horizontally divided focusing pixels, and the vertically divided focusing pixels and the horizontally divided focusing pixels are respectively arranged between the adjacent groups of the four groups.
7. The method of claim 6, wherein the method comprises the following steps: the light filtering units corresponding to the four pixels forming one group are of the same color, and the light filtering units are arranged among the four groups according to a Bayer arrangement mode.
8. The method of claim 7, wherein the method comprises the following steps: the phase difference of the read vertical division focusing pixels is a first phase difference, the phase difference of the read horizontal division focusing pixels is a second phase difference, and the focusing program carries out focusing according to the first phase difference and/or the second phase difference.
9. The utility model provides a module of making a video recording which characterized in that: use of the image sensor according to any one of claims 1 to 8.
10. A photographing apparatus, characterized in that: the image sensor comprising any one of claims 1 to 8, wherein the method for solving the problem of failure in focusing of the camera to shoot the special texture shape is adopted to shoot the image in focusing.
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