WO2023098284A1 - Capteur d'image, module de caméra, dispositif électronique, et procédé et appareil de génération d'image - Google Patents

Capteur d'image, module de caméra, dispositif électronique, et procédé et appareil de génération d'image Download PDF

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Publication number
WO2023098284A1
WO2023098284A1 PCT/CN2022/124077 CN2022124077W WO2023098284A1 WO 2023098284 A1 WO2023098284 A1 WO 2023098284A1 CN 2022124077 W CN2022124077 W CN 2022124077W WO 2023098284 A1 WO2023098284 A1 WO 2023098284A1
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WIPO (PCT)
Prior art keywords
color
panchromatic
filter
image
diagonal
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PCT/CN2022/124077
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English (en)
Chinese (zh)
Inventor
李小涛
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Oppo广东移动通信有限公司
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Publication of WO2023098284A1 publication Critical patent/WO2023098284A1/fr

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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
    • 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
    • H04N23/51—Housings
    • 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
    • H04N23/55—Optical parts specially adapted for electronic image sensors; Mounting 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
    • H04N23/57—Mechanical or electrical details of cameras or camera modules specially adapted for being embedded in other devices
    • 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
    • H04N23/84—Camera processing pipelines; Components thereof for processing colour signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N25/00—Circuitry of solid-state image sensors [SSIS]; Control thereof
    • H04N25/10—Circuitry of solid-state image sensors [SSIS]; Control thereof for transforming different wavelengths into image signals
    • H04N25/11—Arrangement of colour filter arrays [CFA]; Filter mosaics

Definitions

  • the present application relates to the field of computer technology, in particular to an image sensor, camera module, electronic equipment, image generation method, device, electronic equipment, computer readable storage medium and computer program product.
  • An image sensor is arranged in the camera, and a color image is collected by the image sensor.
  • an optical filter array arranged in the form of a Bayer (Bayer) array is usually arranged in the image sensor, so that multiple pixels in the image sensor can receive light passing through the corresponding optical filter, thereby Generate pixel signals with different color channels to generate an image.
  • Various embodiments according to the present application provide an image sensor, a camera module, an electronic device, an image generating method, an apparatus, an electronic device, a computer-readable storage medium, and a computer program product.
  • An image sensor the image sensor includes a filter array and a pixel array
  • the filter array includes a minimum repeating unit, the minimum repeating unit includes a plurality of filter groups, each filter group only It includes two colors of color filters and panchromatic filters, the amount of light transmitted by the panchromatic filter is greater than the amount of light transmitted by the color filter;
  • the panchromatic filter and the The color filters are alternately arranged on each row and each column of the minimum repeating unit; each of the panchromatic filters includes N rows and N columns of panchromatic sub-filters, and each of the color filters
  • the light sheet includes color sub-filters in N rows and N columns, the color sub-filters in N rows and N columns are the same color as the color filter, and N is a positive integer; each of the pixel arrays Pixels are arranged corresponding to the sub-filters of the filter array, and the pixel array is configured to receive light passing through the filter array to generate electrical signals.
  • a camera module the camera module includes a lens and the above-mentioned image sensor; the image sensor is used to receive light passing through the lens, and the pixels generate electrical signals according to the light.
  • An electronic device comprising:
  • a casing, the camera module is arranged on the casing.
  • the image sensor includes a filter array and a pixel array
  • the filter array includes a minimum repeating unit
  • the minimum repeating unit includes a plurality of filter groups, and only Including 2 colors of color filter and panchromatic filter, the amount of light transmitted by the panchromatic filter is greater than that of the color filter, and more can be obtained through the panchromatic filter when shooting There is no need to adjust the shooting parameters, and the sharpness of imaging in low light is improved without affecting the stability of shooting.
  • both stability and clarity can be taken into account, and the stability and clarity of imaging in dark light are both high.
  • each panchromatic filter and the color filter are alternately arranged on each row and each column, and each panchromatic filter includes N rows and N columns of panchromatic sub-filters, and each color filter includes N rows and N columns of color sub-filters, N rows and N columns of color sub-filters have the same color as the color filter, and N is a positive integer; and each pixel in the pixel array and the sub-filter of the filter array Corresponding setting of slices, that is, each row and each column in the pixel array includes color pixels of each color, which can improve the color resolution of each row and column of imaging, and make the color of imaging richer.
  • An image generation method applied to an image sensor, the image sensor includes a filter array and a pixel array, the filter array includes a minimum repeating unit, and the minimum repeating unit includes a plurality of filter groups, each The filter group only includes color filters of two colors and a panchromatic filter, and the amount of light transmitted by the panchromatic filter is greater than the amount of light transmitted by the color filter;
  • the color filters and the color filters are alternately arranged in each row and each column of the minimum repeating unit; each of the panchromatic filters includes N rows and N columns of panchromatic sub-filters, Each of the color filters includes color sub-filters in N rows and N columns, and the color sub-filters in N rows and N columns are the same color as the color filter, and the N is greater than or equal to A positive integer of 2; each pixel in the pixel array is set corresponding to the sub-filter of the filter array, and the pixel array is configured to receive light passing through the filter array to generate electrical Signal;
  • the methods include:
  • the panchromatic pixel corresponding to each panchromatic sub-filter in the panchromatic filter is read out the full-resolution panchromatic pixel value, and each of the color filters is The color pixel corresponding to the color sub-filter reads out the full-resolution color pixel value;
  • a full resolution target image is generated based on each of said full resolution panchromatic pixel values and each of said full resolution color pixel values.
  • An image generating device applied to an image sensor, the image sensor includes a filter array and a pixel array, the filter array includes a minimum repeating unit, and the minimum repeating unit includes a plurality of filter groups, each The filter group only includes color filters of two colors and a panchromatic filter, and the amount of light transmitted by the panchromatic filter is greater than the amount of light transmitted by the color filter;
  • the color filters and the color filters are alternately arranged in each row and each column of the minimum repeating unit; each of the panchromatic filters includes N rows and N columns of panchromatic sub-filters, Each of the color filters includes color sub-filters in N rows and N columns, and the color sub-filters in N rows and N columns are the same color as the color filter, and the N is greater than or equal to A positive integer of 2; each pixel in the pixel array is set corresponding to the sub-filter of the filter array, and the pixel array is configured to receive light passing through the filter array to generate electrical Signal;
  • the devices include:
  • the readout module is used to read out the full-resolution panchromatic pixels from the panchromatic pixels corresponding to each panchromatic sub-filter in the panchromatic filter in the full-resolution mode, and read the full-resolution panchromatic pixels of the color filter The color pixels corresponding to each color sub-filter in the light sheet read out the full resolution color pixels;
  • An image generating module configured to generate a full-resolution target image based on each of the full-resolution panchromatic pixels and each of the full-resolution color pixels.
  • An electronic device includes a memory and a processor, wherein a computer program is stored in the memory, and when the computer program is executed by the processor, the processor is made to execute the operation of the above-mentioned image generation method.
  • a computer-readable storage medium on which a computer program is stored, and when the computer program is executed by a processor, the operation of the above-mentioned method is realized.
  • a computer program product includes a computer program, and when the computer program is executed by a processor, the operations of the above-mentioned method are realized.
  • the panchromatic pixels corresponding to each panchromatic sub-filter in the panchromatic filter are read out in full Resolution panchromatic pixels, and read out the color pixels corresponding to each color sub-filter in the color filter as full-resolution color pixels, and the amount of light transmitted by the panchromatic filter is greater than that transmitted by the color filter
  • the amount of incoming light can integrate panchromatic channel information into the image to increase the overall light incoming amount, so that based on each full-resolution panchromatic pixel and each full-resolution color pixel, it can generate full-color images with more information and clearer detail analysis. Resolution target image.
  • each panchromatic filter and the color filter are alternately arranged on each row and each column, and each panchromatic filter includes N rows and N columns of panchromatic sub-filters, and each color filter includes N rows and N columns of color sub-filters, N rows and N columns of color sub-filters have the same color as the color filter, and N is a positive integer; and each pixel in the pixel array and the sub-filter of the filter array Slice corresponding setting, that is, each row and each column in the pixel array includes color pixels of each color, which can improve the color resolution of each row and each column of the generated first target image, so that the color of the first target image is more accurate Rich.
  • Fig. 1 is a schematic structural diagram of an electronic device in an embodiment.
  • FIG. 2 is an exploded schematic diagram of an image sensor in one embodiment.
  • Fig. 3 is a schematic diagram of connection between a pixel array and a readout circuit in one embodiment.
  • FIG. 4 is a schematic diagram of the arrangement of the smallest repeating unit in an optical filter array in which N is 1 in an embodiment.
  • FIG. 5 is a schematic diagram of the arrangement of the smallest repeating unit in an optical filter array in which N is 1 in another embodiment.
  • FIG. 6 is a schematic diagram of the arrangement of the smallest repeating unit in an optical filter array in which N is 1 in another embodiment.
  • FIG. 7 is a schematic diagram of the arrangement of the smallest repeating unit in an optical filter array in which N is 1 in another embodiment.
  • FIG. 8 is a schematic diagram of an arrangement of the smallest repeating unit in an optical filter array in which N is 2 in an embodiment.
  • FIG. 9 is a schematic diagram of the arrangement of the smallest repeating unit in an optical filter array in which N is 2 in another embodiment.
  • FIG. 10 is a schematic diagram of the arrangement of the smallest repeating unit in an optical filter array in which N is 2 in another embodiment.
  • FIG. 11 is a schematic diagram of the arrangement of the smallest repeating unit in an optical filter array in which N is 2 in another embodiment.
  • Fig. 12 is a schematic flowchart of an image generation method in an embodiment.
  • Fig. 13 is a schematic diagram of a first target image in an embodiment.
  • Fig. 14 is a schematic flowchart of generating a second target image in an embodiment.
  • Figure 15 is a schematic diagram of a first color image and a first panchromatic image in one embodiment.
  • Fig. 16 is a schematic diagram of a second target image in one embodiment.
  • Fig. 17 is a schematic diagram of a second target image in another embodiment.
  • Fig. 18 is a schematic diagram of a second target image in another embodiment.
  • Fig. 19 is a schematic diagram of a second target image in another embodiment.
  • Fig. 20 is a schematic flowchart of generating a third target image in an embodiment.
  • Fig. 21 is a schematic diagram of combined readout of pixels in the first color image and the first panchromatic image in an embodiment.
  • Fig. 22 is a schematic diagram of a second full-color image of diagonal lines, a second full-color image of anti-diagonal lines, a second color image of diagonal lines, and a second color image of anti-diagonal lines in an embodiment.
  • Fig. 23 is a schematic diagram of a third target image in one embodiment.
  • Fig. 24 is a structural block diagram of an image generating device in an embodiment.
  • Fig. 25 is a schematic diagram of the internal structure of an electronic device in one embodiment.
  • first, second and the like used in this application may be used to describe various elements herein, but these elements are not limited by these terms. These terms are only used to distinguish one element from another element.
  • a first object image could be termed a second object image, and, similarly, a second object image could be termed a first object image, without departing from the scope of the present application.
  • Both the first object image and the second object image are object images, but they are not the same object image.
  • the electronic device 100 includes a mobile phone, a tablet computer, a notebook computer, an ATM, a gate machine, a smart watch, a head-mounted display device, etc. It can be understood that the electronic device 100 can also be any other device with image processing functions.
  • the electronic device 100 includes a camera module 20 , a processor 30 and a casing 40 .
  • the camera module 20 and the processor 30 are both arranged in the housing 40, and the housing 40 can also be used to install functional modules such as power supply devices and communication devices of the electronic device 100, so that the housing 40 provides dustproof and drop-proof protection for the functional modules. , waterproof and other protection.
  • the camera module 20 may be a front camera module, a rear camera module, a side camera module, an under-screen camera module, etc., which is not limited here.
  • the camera module 20 includes a lens and an image sensor 21. When the camera module 20 captures an image, light passes through the lens and reaches the image sensor 21.
  • the image sensor 21 is used to convert the light signal irradiated on the image sensor 21 into an electrical signal.
  • the image sensor 21 includes a microlens array 22 , a filter array 23 , and a pixel array 24 .
  • the microlens array 22 includes a plurality of microlenses 221, the microlenses 221, the sub-filters in the filter array 23, and the pixels in the pixel array 24 are set in one-to-one correspondence, and the microlenses 221 are used to gather the incident light.
  • the collected light will pass through the corresponding sub-filter, and then projected onto the pixel, and be received by the corresponding pixel, and the pixel converts the received light into an electrical signal.
  • the filter array 23 includes a plurality of minimal repeating units 230 .
  • the minimum repeating unit 230 includes a plurality of filter groups, and each filter group only includes two colors of color filters 234 and panchromatic filters 233, and the amount of light transmitted by the panchromatic filters 233 is greater than The amount of light transmitted by the color filter 234 .
  • Panchromatic filters 233 and color filters 234 are alternately arranged in each row and each column.
  • Each panchromatic filter 233 includes N rows and N columns of panchromatic sub-filters
  • each color filter 234 includes N rows and N columns of color sub-filters
  • N rows and N columns of color sub-filters It is the same as the color of the color filter, and N is a positive integer.
  • each row and each column of the minimum repeating unit 230 includes a color filter 234 of each color, that is, the color filters of each color are dispersed and arranged, which can improve the color resolution and brightness change resolution.
  • the color filter mix arrangement of colors also reduces the risk of false colors.
  • the panchromatic filter 233 and the color filter 234 are alternately arranged in each row and each column, that is, the panchromatic filter 233 is arranged in the smallest repeating unit, the first filter group or the second filter group.
  • the number of 50% in the filter group can increase the amount of light entering each local area in the imaging.
  • the filter array 23 includes a minimum repeating unit 230, the minimum repeating unit 230 includes a color filter 234 and a panchromatic filter 233, and the amount of light transmitted by the panchromatic filter 233 is greater than that of the color filter.
  • each panchromatic filter 233 and the color filter 234 are alternately arranged on each row and each column of the minimum repeating unit 230, and each row and each column includes the color of each color Filter 234; each panchromatic filter 233 includes N rows and N columns of panchromatic sub-filters, and each color filter 234 includes N rows and N columns of color sub-filters, N rows and N columns
  • the color sub-filter is the same as the color filter 234, and N is a positive integer; each pixel in the pixel array 24 is set correspondingly to the sub-filter of the filter array 23, and the pixel array 24 is configured to receive Light from the light sheet array 23 is filtered to generate electrical signals.
  • the minimum repeating unit 230 includes 2 first filter groups 231 and 2 second filter groups 232, and the 2 first filter groups 231 are arranged on the diagonal of the minimum repeating unit 230
  • the two second filter groups 232 are arranged on the anti-diagonal lines of the smallest repeating unit 230 .
  • Two first filter sets 231 and two second filter sets 232 are arranged in matrix.
  • the diagonal line may be a connecting line between the upper left corner and the lower right corner, or may be a connecting line between the upper right corner and the lower left corner.
  • Diagonals and anti-diagonals are perpendicular to each other. That is to say, if the diagonal line is the line connecting the upper left corner and the lower right corner, then the anti-diagonal line is the line connecting the upper right corner and the lower left corner; if the diagonal line is the line connecting the upper right corner and the lower left corner, then the anti-diagonal line is is the line connecting the upper left and lower right corners.
  • the color filters 234 of each filter set are arranged on the diagonal of the corresponding filter set and in a direction parallel to the diagonal.
  • the corresponding filter group is the filter group where the color filter 234 is located.
  • each filter set includes a plurality of subunits, each subunit includes a color filter 234 and a panchromatic filter 233, and the color filters 234 in the subunits are arranged on opposite sides of the subunits. Diagonal line, the panchromatic filter 233 in the sub-unit is arranged on the anti-diagonal line of the sub-unit.
  • the color filter 234 includes a first color filter, a second color filter and a third color filter.
  • the minimum repeating unit 230 includes at least a first filter group 231 and a second filter group 232, the first filter group 231 includes a first color filter and a second color filter, and the second filter group 232 includes a second color filter and a third color filter.
  • the first color filter, the second color filter and the third color filter are filters of three different colors.
  • the colors of the first color filter, the second color filter and the third color filter can all be set as required.
  • the first color filter may be a red filter
  • the second color filter may be a green filter
  • the third color filter may be a blue filter.
  • the second color filter in the first filter group 231 is arranged on the diagonal of the first filter group 231; the second color filter in the second filter group 232 is arranged on the second On the diagonal of the filter group 232. Then, the first color filter in the first filter group 231 is arranged on the direction parallel to the diagonal of the first filter group in the first filter group 231; the second filter group 232 The third color filter is arranged in the direction parallel to the diagonal of the second filter group 232 in the second filter group.
  • the filter array can make the distribution of the first color filter and the third color filter more balanced in the diagonal direction, that is, obliquely at 45 degrees. For example, imagine some color changing stripes in the column direction, each color line occupies a pixel width, since the filter in this image sensor is arranged on each column, the corresponding color pixels can be obtained, then the column direction can be estimated Colored pixel values for all pixels above.
  • the width of the wavelength band of the light transmitted by the color filter 234 is smaller than the width of the wavelength band of the light transmitted by the panchromatic filter 233, for example, the wavelength band of the transmitted light of the color filter 234 can correspond to the wavelength band of red light , the wavelength band of green light, or the wavelength band of blue light, the wavelength band of the light transmitted by the panchromatic filter is the wavelength band of all visible light, that is to say, the color filter 234 only allows light of a specific color to transmit light, while the panchromatic filter
  • the light sheet 233 can pass light of all colors.
  • the wavelength band of the light transmitted by the color filter 234 may also correspond to the wavelength band of other colored light, such as magenta light, purple light, cyan light, yellow light, etc., which is not limited here.
  • the pixel array 24 includes a plurality of pixels, and the pixels of the pixel array 24 are arranged corresponding to the sub-filters of the filter array 23 .
  • the pixel array 24 is configured to receive light passing through the filter array 23 to generate electrical signals.
  • the pixel array 24 is configured to receive the light passing through the filter array 23 to generate an electrical signal, which means that the pixel array 24 is used to detect a scene of a given set of subjects passing through the filter array 23
  • the light is photoelectrically converted to generate an electrical signal.
  • the light rays of the scene for a given set of subjects are used to generate image data.
  • the subject is a building
  • the scene of a given set of subjects refers to the scene where the building is located, which may also contain other objects.
  • the pixel array 24 includes a plurality of minimum repeating units 240, and the minimum repeating unit 240 also includes a plurality of panchromatic pixels 241 and a plurality of color pixels 242 of different colors, and the panchromatic pixels 241 and the color pixels 242 are arranged in each row. Alternately arranged on each column, each row and each column include color pixels of each color; each panchromatic pixel 242 is corresponding to a sub-filter in the panchromatic filter 233, and the panchromatic pixel 242 receives the pass through Light that passes through the corresponding sub-filters to generate electrical signals. Each color pixel 242 corresponds to a sub-filter of the color filter 234, and the color pixel 242 receives light passing through the corresponding sub-filter to generate an electrical signal.
  • the readout circuit 25 is electrically connected to the pixel array 24 for controlling the exposure of the pixel array 24 and reading and outputting the pixel values of the pixels.
  • the readout circuit 25 includes a vertical drive unit 251 , a control unit 252 , a column processing unit 253 , and a horizontal drive unit 254 .
  • the vertical driving unit 251 includes a shift register and an address decoder.
  • the vertical driving unit 251 includes readout scanning and reset scanning functions.
  • the control unit 252 configures timing signals according to the operation mode, and uses various timing signals to control the vertical driving unit 251 , the column processing unit 253 and the horizontal driving unit 254 to work together.
  • the column processing unit 253 may have an analog-to-digital (A/D) conversion function for converting an analog pixel signal into a digital format.
  • the horizontal driving unit 254 includes a shift register and an address decoder. The horizontal driving unit 254 sequentially scans the pixel array 24 column by column.
  • the image sensor includes a filter array 23 and a pixel array 24, the filter array 23 includes a minimum repeating unit, the minimum repeating unit includes a plurality of filter groups, and each filter group only includes 2 colors
  • the color filter 234 and the panchromatic filter 233 the amount of light transmitted by the panchromatic filter 233 is greater than the amount of light transmitted by the color filter 234, and more can be obtained by the panchromatic filter 233 when shooting. There is more light, so there is no need to adjust shooting parameters, and the clarity of imaging in low light is improved without affecting the stability of shooting. When imaging in dark light, both stability and clarity can be taken into account, and the stability and clarity of imaging in dark light are both high.
  • panchromatic filters 233 and the color filters 234 are arranged alternately in each row and each column, that is, the filter array includes 50% of the panchromatic filters, which can increase the amount of incoming light, and can also improve Color resolution capability for row-oriented textures and column-oriented textures.
  • Each panchromatic filter 233 includes N rows and N columns of panchromatic sub-filters, each color filter 234 includes N rows and N columns of color sub-filters, and N rows and N columns of color sub-filters The same as the color of the color filter, N is a positive integer; and each pixel in the pixel array 24 corresponds to the sub-filter of the filter array 23, that is, each row and each column in the pixel array 24 includes each The color pixels 242 of different colors can improve the color resolution of each row and each column of the imaging, making the imaging colors richer.
  • each panchromatic filter 233 includes 1 row and 1 column of panchromatic sub-filters, and each color filter 234 includes 1 row and 1 column of color sub-filters, that is to say, Each panchromatic sub-filter is a panchromatic filter 233, and each color sub-filter is a color filter.
  • the minimum repeating unit when N is 1, the minimum repeating unit includes 64 filters in 8 rows and 8 columns, and the arrangement is as follows:
  • w represents a panchromatic filter
  • a, b and c all represent color filters.
  • the minimum repeating unit when N is 1, includes 8 rows and 8 columns of 64 filters, and the arrangement is as follows:
  • w represents a panchromatic filter
  • a, b and c all represent color filters.
  • the minimum repeating unit when N is 1, the minimum repeating unit includes 64 filters in 8 rows and 8 columns, and the arrangement is as follows:
  • w represents a panchromatic filter
  • a, b and c all represent color filters.
  • the minimum repeating unit when N is 1, the minimum repeating unit includes 64 filters in 8 rows and 8 columns, and the arrangement is as follows:
  • w represents a panchromatic filter
  • a, b and c all represent color filters.
  • w can be a white filter, a a red filter, b a green filter, c a blue filter, or for example a a magenta filter, b a cyan filter, c It is a yellow filter or the like, and is not limited here.
  • N is 2, and the minimum repeating unit includes 256 sub-filters in 16 rows and 16 columns, and the arrangement is as follows:
  • w represents a panchromatic sub-filter
  • a, b, and c all represent color sub-filters.
  • N is 2, and the minimum repeating unit includes 256 sub-filters in 16 rows and 16 columns, and the arrangement is as follows:
  • w represents a panchromatic sub-filter
  • a, b, and c all represent color sub-filters.
  • N is 2, and the minimum repeating unit includes 256 sub-filters in 16 rows and 16 columns, and the arrangement is as follows:
  • w represents a panchromatic sub-filter
  • a, b, and c all represent color sub-filters.
  • N is 2, and the minimum repeating unit includes 256 sub-filters in 16 rows and 16 columns, and the arrangement is as follows:
  • w represents a panchromatic sub-filter
  • a, b, and c all represent color sub-filters.
  • N can also be other positive integers such as 3, 4, or 5, and the arrangement method is similar to that of N being 1 or 2, which will not be repeated here.
  • w can be a white sub-filter, a a red sub-filter, b a green sub-filter, c a blue sub-filter, or for example a a magenta sub-filter and b a cyan Sub-filters, c is a yellow sub-filter, etc., which is not limited here.
  • a camera module is also provided.
  • the camera module includes a lens and the above-mentioned image sensor; the image sensor is used to receive light passing through the lens, and the pixels generate electrical signals according to the light.
  • an electronic device comprising the above-mentioned camera module; and a casing, on which the camera module is arranged.
  • an image generation method is applied to an image sensor, the image sensor includes a filter array 23 and a pixel array 24, the filter array 23 includes a minimum repeating unit, and the minimum repeating unit includes a plurality of filter groups , each filter group only includes color filters 234 and panchromatic filters 233 of two colors, and the amount of light transmitted by the panchromatic filter 233 is greater than the amount of light transmitted by the color filter 234; Panchromatic filters 233 and color filters 234 are alternately arranged in each row and column; each panchromatic filter 233 includes N rows and N columns of panchromatic sub-filters, and each color filter 234 includes N rows and N columns of color sub-filters, N rows and N columns of color sub-filters have the same color as the color filter, and N is a positive integer greater than or equal to 2; each pixel in the pixel array 24 and the filter The sub-filters of the optical filter array 23 are arranged correspondingly, and the pixel array 24 is configured to receive light passing through the optical filter array 23 to generate
  • the above method includes:
  • Operation 1202 in the full-resolution mode, read out the full-resolution panchromatic pixel value from the panchromatic pixel corresponding to each panchromatic sub-filter in the panchromatic filter, and read out the full-resolution panchromatic pixel value of each color sub-filter in the color filter The color pixel corresponding to the sub-filter reads out the full-resolution color pixel value.
  • Full resolution mode is a mode in which each sub-filter is read out as one pixel.
  • the color filter 234 has a narrower spectral response than that of the panchromatic filter 233, so the amount of light transmitted by the panchromatic filter 233 is greater than the amount of light transmitted by the color filter 234, that is, the color filter 234
  • the wavelength band width of the transmitted light is smaller than the wavelength band width of the light transmitted by the panchromatic filter 233, and the panchromatic filter 233 transmits more light, and the corresponding panchromatic pixel 241 has With a higher signal-to-noise ratio, the panchromatic pixel 241 contains more information, and can resolve more texture details.
  • the signal-to-noise ratio refers to the ratio between the normal signal and the noise signal. The higher the signal-to-noise ratio of a pixel, the higher the proportion of normal signals contained in the pixel, and the more information can be analyzed from the pixel.
  • the color pixels 242 may be G (Green, green) pixels, R (Red, red) pixels, B (Blue, blue) pixels, etc., but are not limited thereto.
  • the light transmitted by the panchromatic sub-filter in the panchromatic filter 233 is projected onto the corresponding panchromatic pixel 241, and the panchromatic pixel 241 receives the light passing through the panchromatic sub-filter to generate electrical signals.
  • the light transmitted by the color sub-filter in the color filter 234 is projected onto the corresponding color pixel 242 , and the color pixel 242 generates an electrical signal through the light passing through the corresponding color sub-filter.
  • Each panchromatic filter 233 includes N rows and N columns of panchromatic sub-filters, and each panchromatic filter 233 corresponds to N rows and N columns of panchromatic pixels 241 .
  • Each color filter 234 includes N rows and N columns of color sub-filters of the same color, and each color filter 234 corresponds to N rows and N columns of color pixels 242 .
  • N is a positive integer greater than or equal to 2.
  • N may also be 1, that is, each panchromatic filter 233 corresponds to one panchromatic pixel 241 , and each color filter 234 corresponds to one color pixel 242 .
  • a full resolution target image is generated based on the respective full resolution panchromatic pixel values and the respective full resolution color pixel values.
  • the electronic device can read pixel values from each full-resolution panchromatic pixel value and each full-resolution color pixel value according to a preset pixel reading method to generate a full-resolution target image.
  • the preset pixel reading mode is a preset pixel reading mode.
  • the panchromatic pixel corresponding to each panchromatic sub-filter in the panchromatic filter is read out the full resolution panchromatic pixel, and each panchromatic pixel in the color filter is The color pixels corresponding to the color sub-filters read out full-resolution color pixels, and the amount of light transmitted by the panchromatic filter is greater than the amount of light transmitted by the color filter, which can integrate the information of the panchromatic channel into the image.
  • the overall light input is increased, so that based on each full-resolution panchromatic pixel and each full-resolution color pixel, a full-resolution target image with more information and clearer detail analysis can be generated.
  • each panchromatic filter and the color filter are alternately arranged on each row and each column, and each panchromatic filter includes N rows and N columns of panchromatic sub-filters, and each color filter includes N rows and N columns of color sub-filters, N rows and N columns of color sub-filters have the same color as the color filter, and N is a positive integer; and each pixel in the pixel array and the sub-filter of the filter array Slice corresponding setting, that is, each row and each column in the pixel array includes color pixels of each color, which can improve the color resolution of each row and each column of the generated first target image, so that the color of the first target image is more accurate Rich.
  • the above method further includes: in the first resolution mode, combining the panchromatic pixels 241 corresponding to the panchromatic sub-filters in each panchromatic filter 233 to read out the first panchromatic pixel value, and the color pixels 242 corresponding to each color sub-filter in each color filter 234 are combined to read out the first color pixel value; based on each first panchromatic pixel value and each first color pixel value, generate the first color pixel value a target image.
  • the first resolution mode refers to a first-level pixel binning readout mode in which resolution, power consumption, signal-to-noise ratio, and frame rate are relatively balanced.
  • the first resolution mode may be a default mode for shooting images and videos.
  • the first resolution mode is used to respond to the shooting instruction.
  • the light transmitted by the panchromatic sub-filter in the panchromatic filter 233 is projected onto the corresponding panchromatic pixel 241, and the panchromatic pixel 241 receives the light passing through the panchromatic sub-filter. light to generate electrical signals.
  • the light transmitted by the color sub-filter in the color filter 234 is projected onto the corresponding color pixel 242 , and the color pixel 242 generates an electrical signal through the light passing through the corresponding color sub-filter.
  • Combined readout refers to summing the pixel values of multiple pixels, or calculating the average value of the pixel values of multiple pixels.
  • the panchromatic pixels 241 corresponding to each panchromatic sub-filter are averaged, and the average value is read out as the first panchromatic pixel value.
  • sum the panchromatic pixel 241 corresponding to each panchromatic sub-filter and read the sum obtained as the first panchromatic pixel value.
  • the electronic device may also use other methods to combine the panchromatic pixels 241 corresponding to the panchromatic sub-filters to read out the first panchromatic pixel value, which is not limited here.
  • the color pixel 242 corresponding to each color sub-filter is averaged, and the average value is read out as the first color pixel value.
  • the color pixels corresponding to each color sub-filter are summed, and the sum obtained by the addition is read out as the first color pixel value.
  • the electronic device may also combine the color pixels 242 corresponding to the color sub-filters in other ways to read out the first color pixel value, which is not limited here.
  • the way of combining and reading out the first panchromatic pixel values may be the same or different.
  • the way of combining and reading out the first color pixel values may be the same or different.
  • the panchromatic filter 233 and the color filter 234 the way of combining and reading out the first panchromatic pixel value and the first color pixel value may be the same or different.
  • the electronic device can read pixel values from each first panchromatic pixel value and each first color pixel value according to a preset pixel reading method to generate a first target image.
  • the preset pixel reading mode is a preset pixel reading mode. Taking the arrangement of the smallest repeating unit of the filter array 23 as shown in FIG. 8 as an example, the generated first target image is shown in FIG. 13 .
  • the panchromatic pixels 241 corresponding to each panchromatic sub-filter in each panchromatic filter 233 are combined to read out the first panchromatic pixel value, and each The color pixels 242 corresponding to each color sub-filter in each color filter 234 are combined to read the first color pixel value, and the amount of light transmitted by the panchromatic filter 233 is greater than the amount of light transmitted by the color filter 234 , can integrate the panchromatic channel information into the image to increase the overall light input, so that based on each first panchromatic pixel value and each first color pixel value, the first target image with more information and clearer detail analysis can be generated .
  • panchromatic filter 233 and the color filter 234 are alternately arranged on each row and each column, and each panchromatic filter 233 includes N rows and N columns of panchromatic sub-filters, and each color filter
  • the light sheet 234 includes color sub-filters of the same color in N rows and N columns, and N is a positive integer;
  • Each row and each column includes color pixels of each color, which can improve the color resolution of each row and each column of the generated first target image, making the color of the first target image richer.
  • each filter set includes a plurality of subunits, each subunit includes a color filter and a panchromatic filter, and the color filters in the subunits are arranged on the diagonal of the subunits , the panchromatic filters in the subunits are arranged on the anti-diagonal lines of the subunits.
  • the sub-unit includes 2 rows and 2 columns of filters, the color filters in the sub-unit are arranged on the diagonal of the sub-unit, and the panchromatic filters in the sub-unit are arranged on the anti-diagonal of the sub-unit . That is to say, the filters in 2 rows and 2 columns are arranged in a matrix.
  • Operation 1402 in the second resolution mode, combine the multiple first panchromatic pixel values corresponding to each subunit in the first target image to read out the second panchromatic pixel value, and based on each second panchromatic pixel value value produces the first panchromatic image; the second resolution mode corresponds to a smaller resolution than the first resolution mode.
  • the second resolution mode refers to the mode used in the scene where the resolution requirement is lower than that of the first resolution mode. out mode.
  • the resolution and power consumption corresponding to the second resolution mode are smaller than the resolution and power consumption corresponding to the first resolution mode.
  • the signal-to-noise ratio and frame rate corresponding to the second resolution mode are greater than the signal-to-noise ratio and frame rate corresponding to the first resolution mode.
  • the second resolution mode may specifically be a preview mode during image capture, a preview mode during video capture, or a scene with lower resolution requirements such as image capture and video capture under night scenes, but is not limited thereto.
  • the preview modes of video shooting include 1080p video preview, application video preview, etc.
  • the shooting instruction is preview shooting.
  • the second resolution mode is triggered.
  • the electronic device detects whether the current environment is a night scene, and if the current environment is a night scene, triggers the second resolution mode.
  • the readout mode corresponding to the second resolution mode is triggered.
  • the electronic device combines the multiple first panchromatic pixel values corresponding to each subunit in the first target image to read out the second panchromatic pixel value, and according to the preset pixel reading method, from each second panchromatic pixel value Color Pixel Values Pixel values are read to generate a first full-color image.
  • each pixel value in the first target image is obtained by combining the sub-corresponding pixels in each filter in the filter array in the first resolution mode, then each pixel value in the first target image
  • a pixel value corresponds to each filter in the filter array, and also corresponds to a plurality of sub-filters in each filter.
  • the smallest repeating unit of the filter array includes a plurality of filter groups, each filter group includes a plurality of subunits, each subunit includes a color filter and a panchromatic filter, and each subunit includes a color filter
  • the optical filter and the panchromatic filter correspond to pixel values in the first target image, and each subunit can correspond to multiple pixel values in the first target image.
  • the electronic device determines a plurality of pixel values of each subunit in the first target image, acquires a plurality of first panchromatic pixels from the plurality of pixel values and reads out a second panchromatic pixel value, And acquiring a plurality of first color pixel values of the same color from the plurality of pixel values and reading out a second color pixel value.
  • combining readout may include one of methods such as averaging, summing, or weighted averaging, which is not limited here.
  • Operation 1404 combining the first color pixel values of the same color in each preset area of the first target image to read out the second color pixel values, and generating a first color image based on each second color pixel value.
  • the electronic device combines multiple first color pixel values corresponding to each subunit in the first target image to read out the second color pixel value, and calculates the second color pixel value according to the preset pixel value.
  • pixel values are read from respective second color pixel values to generate a first color image.
  • combining readout may include one of methods such as averaging, summing, or weighted averaging, which is not limited here.
  • the generated first color image is shown as 1502 in FIG. 15
  • the generated first full-color image is shown as 1504 .
  • Operation 1406 based on the first panchromatic image and the first color image, generate a second target image.
  • the electronic device arranges each row of second panchromatic pixel values in the first full-color image alternately with each row of second color pixel values in the first color image to generate a second target image; or the first full-color image
  • Each column of second panchromatic pixel values in the first color image is alternately arranged with each column of second color pixel values in the first color image to generate a second target image.
  • FIG. 16 and 17 are schematic diagrams of the second target image obtained by alternately arranging each row of second panchromatic pixel values in the first full-color image and each row of second color pixel values in the first color image.
  • Fig. 18 and Fig. 19 are the second target image obtained by alternately arranging each column of second panchromatic pixel values in the first panchromatic image and each column of second color pixel values in the first color image.
  • the electronic device may also combine pixel values at the same position in the first full-color image and the first color image to obtain combined pixel values at corresponding positions, and form the second target image based on the combined pixel values.
  • the merging may adopt one of methods such as averaging, weighted averaging, or adding and summing.
  • the electronic device may also use other methods to generate the second target image, which is not limited here.
  • each first panchromatic pixel values corresponding to each subunit in the first target image are combined to read out the second panchromatic pixel value
  • the first target In the image multiple first color pixel values of the same color corresponding to each subunit are combined to read out the second color pixel value, and each different color pixel 242 can be mixed and arranged so that the generated second target image
  • the distribution of each second color pixel such as RGB pixel is more uniform, and the image quality is higher.
  • the resolution and image size of the obtained second target image are further reduced, and the panchromatic pixel 241 has a higher signal-to-noise ratio, and the frame rate of the image is high, so that the power consumption of the secondary pixel combination output is lower , Better signal-to-noise ratio image processing effect.
  • the panchromatic pixel 241 has a higher signal-to-noise ratio, and the frame rate of the image is high, so that the power consumption of the secondary pixel combination output is lower , Better signal-to-noise ratio image processing effect.
  • the second resolution mode there are full-arranged panchromatic pixels without interpolation, which improves the overall resolution.
  • the color pixels of each color such as the pixels of the first color and the pixels of the third color, are more dispersed and balanced in the diagonal direction or anti-diagonal direction.
  • each filter group includes a plurality of subunits, each subunit includes a color filter and a panchromatic filter, and the color filters in the subunits are arranged on the diagonal of the subunits, The panchromatic filters in the subunits are arranged on anti-diagonal lines of the subunits; the above method also includes: in the second resolution mode, each panchromatic sub-filter of the plurality of panchromatic filters in each subunit The panchromatic pixels corresponding to the light sheet are combined to read out the fourth panchromatic pixel value, and a third panchromatic image is generated based on each fourth panchromatic pixel value; The color pixels corresponding to the sub-filters are combined to read fourth color pixel values, and a third color image is generated based on each fourth color pixel value; a fourth target image is generated based on the third panchromatic image and the third color image.
  • the combined readout method may be one of averaging, weighted averaging, or addition.
  • generating the fourth target image includes: combining the fourth panchromatic pixel value of each row in the third panchromatic image with the fourth panchromatic pixel value of each row in the third color image The four color pixel values are arranged alternately to generate the fourth target image; or the fourth panchromatic pixel values of each column in the third panchromatic image and the fourth color pixel values of each column in the third color image are arranged alternately to generate the fourth target image. target image.
  • the electronic device may also combine pixel values at the same position in the third panchromatic image and the third color image to obtain combined pixel values at corresponding positions, and form a fourth target image based on the combined pixel values.
  • the combined readout may adopt one of methods such as averaging, weighted averaging, or adding and summing.
  • the electronic device may also use other methods to generate the fourth target image, which is not limited here.
  • the panchromatic pixels corresponding to the panchromatic sub-filters of the plurality of panchromatic filters in each subunit are combined to read out the fourth panchromatic pixel value, and Combining the color pixels corresponding to the color sub-filters of multiple color filters of the same color in each subunit to read out the fourth color pixel value can generate the third panchromatic image and the third color image more quickly, thereby Generate the fourth target image more quickly.
  • the above-mentioned embodiment can mix and arrange different color pixels, so that the distribution of each fourth color pixel value, such as RGB pixels, in the generated fourth target image is more uniform, and the image quality is higher. Moreover, the resolution and image size of the obtained fourth target image are further reduced, and the panchromatic pixel 241 has a higher signal-to-noise ratio, and the frame rate of the image is high, so that the power consumption of the secondary pixel combination output is lower , Better signal-to-noise ratio image processing effect.
  • each fourth color pixel value such as RGB pixels
  • the above method further includes:
  • Operation 2002 in the third resolution mode, combine the second panchromatic pixel values corresponding to multiple diagonal lines in the same filter set in the first panchromatic image to read out the third panchromatic pixel values of the diagonal lines color pixel values, and generate a diagonal second panchromatic image based on the third panchromatic pixel values of each diagonal; Combining the second panchromatic pixel values on the line to read out the third panchromatic pixel values of the anti-diagonal lines, and generating the second panchromatic image of the anti-diagonal lines based on the third panchromatic pixel values of the respective anti-diagonal lines; the third resolution The resolution corresponding to the second resolution mode is smaller than the resolution corresponding to the second resolution mode.
  • the third resolution mode refers to the mode used in the scene where the resolution requirement is lower than that of the second resolution mode. It is a three-level pixel binning read with low resolution, low power consumption, high SNR and high frame rate out mode.
  • the resolution and power consumption corresponding to the third resolution mode are smaller than the resolution and power consumption corresponding to the second resolution mode.
  • the signal-to-noise ratio and frame rate corresponding to the third resolution mode are greater than the signal-to-noise ratio and frame rate corresponding to the second resolution mode.
  • the third resolution mode may specifically be a preview mode during image capture, a preview mode during video capture, or a night scene mode for image capture and video capture under night scenes, etc., but is not limited thereto.
  • the preview modes of video shooting include 720p video preview, application video preview, etc.
  • the electronic device reads pixel values from the third panchromatic pixel values of each diagonal line according to a preset pixel reading manner to generate a second panchromatic image of the diagonal lines.
  • the electronic device reads pixel values from the third panchromatic pixel values of each anti-diagonal line according to a preset pixel reading manner to generate a second anti-diagonal panchromatic image.
  • Operation 2004, combining the second color pixel values of the same color corresponding to multiple diagonal lines in the same filter set in the first color image to read out the third color pixel values of the diagonal lines, and based on each pair
  • the second color image of the diagonal line is generated by the third color pixel value of the diagonal line;
  • the electronic device reads pixel values from the third color pixel values of each diagonal line according to a preset pixel reading method to generate a second color image of the diagonal lines.
  • the electronic device reads pixel values from the third color pixel values of each anti-diagonal line according to a preset pixel reading method to generate a second color image of the anti-diagonal line.
  • the electronic device maps the first panchromatic image 1504 to the same filter
  • the second panchromatic pixel values on the plurality of diagonals in the group are combined to read out the third panchromatic pixel values of the diagonals, and the second panchromatic pixel values of the diagonals are generated based on the third panchromatic pixel values of the respective diagonals.
  • Panchromatic image 2202 and, combining the second panchromatic pixel values corresponding to multiple anti-diagonal lines in the same filter set in the first panchromatic image 1504 to read out the third panchromatic pixel value of anti-diagonal lines , and generate a second anti-diagonal panchromatic image 2208 based on the third panchromatic pixel values of each anti-diagonal line;
  • the resolution corresponding to the third resolution mode is smaller than the resolution corresponding to the second resolution mode;
  • the first color In the image 1502 the pixel values of the second color corresponding to the same color on multiple diagonals in the same filter group are merged to read out the pixel values of the third color in the direction of the line, and based on the third color pixel values of each diagonal
  • the value generates the second color image 2204 of the diagonal; and, the second color pixel values corresponding to the same color on multiple diagonals in the same filter set in the first color image 1502 are combined to read the anti-diagonal
  • a third target image is generated based on the second panchromatic image of the diagonal, the second panchromatic image of the anti-diagonal, the second color image of the diagonal, and the second color image of the anti-diagonal.
  • the electronic device calculates the third panchromatic pixel value of each diagonal line in the second panchromatic image of the diagonal line and the third panchromatic pixel value of each anti-diagonal line in the second anti-diagonal panchromatic image value, the third color pixel value of each diagonal line in the second color image of the diagonal line and the third color pixel value of each line of the anti-diagonal line in the second color image of the anti-diagonal line are arranged alternately to generate the third The target image; or the third panchromatic pixel value of each column of the diagonal in the second panchromatic image of the diagonal, the third panchromatic pixel value of each column of the anti-diagonal in the second panchromatic image of the anti-diagonal , the third color pixel values of each column of the diagonal in the second color image of the diagonal and the third color pixel values of each column of the anti-diagonal in the second color image of the anti-diagonal are arranged alternately to generate the third target image.
  • the third panchromatic pixel value of each column of the diagonal in the second panchromatic image of the diagonal line is the third panchromatic pixel value of each column of the anti-diagonal line in the second panchromatic image of the anti-diagonal line, and the diagonal In the second color image of the line, the third color pixel value of each column of the diagonal line and the third color pixel value of each column of the anti-diagonal line in the second color image of the anti-diagonal line are arranged alternately, the generated The third target image.
  • the pixel values in each column of the four images in FIG. 22 may also be arranged alternately in other ways to generate the third target image.
  • the above four images can also arrange the pixel values of each row alternately in other ways to generate the third target image.
  • the second panchromatic image 2202 of the diagonal line the second panchromatic image 2208 of the anti-diagonal line, the second color image 2204 of the diagonal line and the second color image 2206 of the anti-diagonal line
  • the The pixel coordinates are consistent.
  • the pixel at position wr1wc1 in Figure 2202, the pixel at gr1gc1 in Figure 2204, the pixel at rbr1rbc1 in Figure 2206, and the pixel coordinates at wr3wc3 in Figure 2208 are all consistent.
  • the coordinates of the pixel at wr2wc2 in Figure 2202, the pixel at gr2gc2 in Figure 2204, the pixel at rbr2rbc2 in Figure 2206, and the pixel coordinates at wr4wc4 in Figure 2208 are all consistent.
  • the electronic device arranges the pixels of the same coordinates of the above four images before arranging the pixels of other coordinates.
  • the arrangement order of the pixels of the same coordinate is not limited.
  • the electronic device arranges the above-mentioned 4 images and arranges the pixel values of each column alternately in other ways, then firstly arrange the wc1 column in Figure 2202, the gc1 column in Figure 2204, and the rgc1 in Figure 2206 Columns and wc3 columns are alternately arranged, and after the arrangement is completed, the wc2 column in Figure 2202, the gc2 column in Figure 2204, the rgc2 column and wc4 column in Figure 2206 are alternately arranged to generate the third target image.
  • the electronic device can also combine the second full-color image of the diagonal line, the second full-color image of the anti-diagonal line, the second color image of the diagonal line and the second color image of the anti-diagonal line
  • the pixel values at the same position are combined to obtain combined pixel values at corresponding positions, and a third target image is formed based on each combined pixel value.
  • the merging may adopt one of methods such as averaging, weighted averaging, or adding and summing.
  • the electronic device may also use other methods to generate the third target image, which is not limited here.
  • the second panchromatic pixels corresponding to multiple diagonal lines in the same filter set in the first panchromatic image are combined, and the first panchromatic pixels
  • the second panchromatic pixels corresponding to multiple diagonals in the same filter set in the color image are combined, and the first color image is corresponding to the second panchromatic pixels on multiple diagonals in the same filter set
  • the two-color pixels are combined, and the second color pixels corresponding to multiple diagonal lines in the same filter group are combined in the first color image, and the different color pixels can be mixed and arranged, so that the generated
  • the third color pixels in the third target image, such as RGB pixels, are more evenly distributed, and the image quality is higher.
  • the resolution and image size of the obtained third target image are further reduced, and the panchromatic pixels have a higher signal-to-noise ratio, and the frame rate of the image is high, so that the power consumption of the three-level pixel combination output is lower, Image processing effect with better signal-to-noise ratio.
  • the third target image includes fully arranged panchromatic pixels, which can improve the overall resolution. At the same time, in the third resolution mode, there is no need to merge pixels of the same color across cycles, and no interpolation is required, which improves the overall resolution.
  • the color pixels of each color such as the pixel values of the first color and the pixel values of the third color, are more dispersed and balanced on the diagonal or anti-diagonal.
  • the full arrangement means that each coordinate has the pixel, and interpolation estimation is not required.
  • the color filters of each filter group are arranged on the diagonal of the corresponding filter group and in a direction parallel to the diagonal, and the panchromatic filter of each filter group
  • the slices are arranged on the anti-diagonal line of the corresponding filter group and the direction parallel to the anti-diagonal line; the above method also includes: in the third resolution mode, multiple The panchromatic pixels corresponding to each panchromatic sub-filter of a panchromatic optical filter combine to read out the fifth panchromatic pixel value of the anti-diagonal line, and generate the anti-diagonal line based on the fifth panchromatic pixel value of each anti-diagonal line of the fourth panchromatic image; and, the panchromatic pixels corresponding to the respective panchromatic sub-filters of the plurality of panchromatic filters on the direction parallel to the anti-diagonal in each filter set are merged and read out in parallel
  • the fifth panchromatic pixel value of the anti-diagonal, and the fourth panchromatic image of the diagonal is generated based on the fifth panchromatic pixel value of each parallel
  • the combined readout method may be one of averaging, weighted averaging, or addition.
  • the fifth target image is generated based on the anti-diagonal fourth panchromatic image, the diagonal fourth panchromatic image, the diagonal fourth color image, and the anti-diagonal fourth color image , including: the fifth panchromatic pixel value of each anti-diagonal line in the fourth panchromatic image of the anti-diagonal line, the fifth panchromatic pixel value of each parallel anti-diagonal line in the fourth panchromatic image of the diagonal line , the fifth color pixel value of each diagonal line in the fourth color image of the diagonal line and the fifth color pixel value of each parallel diagonal line in the fourth color image of the anti-diagonal line are arranged alternately to generate the fifth color pixel value target image; alternatively, the fifth panchromatic pixel value for each column of the anti-diagonal in the anti-diagonal fourth panchromatic image, the fifth panchromatic color for each column of parallel anti-diagonal in the diagonal fourth panchromatic The pixel value, the fifth color pixel value of each diagonal line in the fourth color image of the diagonal line and the fifth color pixel value of
  • the electronic device may also combine the anti-diagonal fourth panchromatic image, the diagonal fourth panchromatic image, the diagonal fourth color image and the anti-diagonal fourth color image
  • the pixel values at the same position are combined to obtain combined pixel values at corresponding positions, and a fourth target image is formed based on each combined pixel value.
  • the combined readout may adopt one of methods such as averaging, weighted averaging, or adding and summing.
  • the electronic device may also use other methods to generate the fifth target image, which is not limited here.
  • the panchromatic pixels corresponding to the panchromatic sub-filters of the plurality of panchromatic filters on the anti-diagonal line in each filter group are combined and read out
  • Pixel merging reads out the fifth panchromatic pixel values of the parallel anti-diagonal lines, which can generate the fourth panchromatic image of the anti-diagonal line and the fourth panchromatic image of the diagonal line more quickly;
  • the color pixels corresponding to each color sub-filter of a plurality of color filters on the line are merged to read out the fifth color pixel value of the diagonal line, and the values of the fifth color pixel in each filter group parallel to the diagonal line
  • the color pixels corresponding to each color sub-filter of multiple color filters in the direction are merged and read out the fifth color pixel value parallel to the diagonal, which can generate the fourth
  • the above-mentioned embodiment can mix and arrange different color pixels, so that the distribution of each fifth color pixel value, such as RGB pixels, in the generated fifth target image is more uniform, and the image quality is higher. Moreover, the resolution and image size of the obtained fifth target image are further reduced, and the panchromatic pixel 241 has a higher signal-to-noise ratio, and the frame rate of the image is high, so that the power consumption of the three-level pixel combination output is lower , Better signal-to-noise ratio image processing effect.
  • each fifth color pixel value such as RGB pixels
  • another image generation method is provided, which is applied to an image sensor.
  • the image sensor includes a filter array 23 and a pixel array 24.
  • the filter array 23 includes a minimum repeating unit 230, and the minimum repeating unit 230 includes A plurality of filter groups, each filter group includes only two colors of color filters 234 and panchromatic filters 233, the amount of light transmitted by the panchromatic filters 233 is greater than that of the color filters 234 The amount of light that passes through; the panchromatic filter 233 and the color filter 234 are arranged alternately on each row and each column of the minimum repeating unit 230; each pixel in the pixel array 24 and the filter of the filter array 23 Correspondingly set, the pixel array 24 is configured to receive light passing through the filter array 23 to generate electrical signals; The color pixel reads out the full-resolution panchromatic pixel value, and the color pixel corresponding to each color filter reads out the full-resolution color pixel value; based on each full-resolution panchromatic pixel value and each full
  • each filter set includes a plurality of subunits, each subunit includes a color filter 234 and a panchromatic filter 233, and the color filters 234 in the subunits are arranged on opposite sides of the subunits.
  • Diagonal line, the panchromatic filter 233 in the subunit is arranged on the anti-diagonal line of the subunit; the above method also includes: in the first resolution mode, a plurality of panchromatic filters corresponding to each subunit Combining panchromatic pixels to read out the sixth panchromatic pixel value, and generating a fifth panchromatic image based on each sixth panchromatic pixel value; combining and reading out the color pixels corresponding to multiple color filters of the same color in each subunit sixth color pixel values, and generate a fifth color image based on each of the sixth color pixel values; generate a sixth target image based on the fifth panchromatic image and the fifth color image. .
  • generating the sixth target image includes: combining the sixth panchromatic pixel value of each row in the fifth panchromatic image with the sixth color pixel value of each row in the fifth color image Arranging alternately to generate the sixth target image; or alternately arranging each column of sixth panchromatic pixel values in the fifth panchromatic image and each column of sixth color pixel values in the fifth color image to generate the sixth target image.
  • the above method further includes: in the second resolution mode, combining and reading sixth panchromatic pixel values corresponding to multiple diagonal lines in the same filter set in the fifth panchromatic image Get the seventh panchromatic pixel value of the diagonal line, and generate the sixth panchromatic image of the diagonal line based on the seventh panchromatic pixel value of each diagonal line; and, corresponding to the same filter in the fifth panchromatic image Combining the sixth panchromatic pixel values on multiple anti-diagonal lines in the slice group to read out the seventh panchromatic pixel values of the anti-diagonal lines, and generating the seventh panchromatic pixel values of the anti-diagonal lines based on the seventh panchromatic pixel values of the anti-diagonal lines
  • Six full-color images the resolution corresponding to the second resolution mode is smaller than the resolution corresponding to the first resolution mode; the fifth color image corresponds to the same color on multiple diagonal lines in the same filter group Combining the pixel values of the sixth color and reading the pixel values of the seventh color of the diagonal, and generating a sixth
  • the seventh target image is generated based on the sixth panchromatic image of the anti-diagonal, the sixth panchromatic image of the diagonal, the sixth color image of the diagonal, and the sixth color image of the anti-diagonal , including: the seventh panchromatic pixel value of each diagonal line in the sixth panchromatic image of the anti-diagonal line, the seventh panchromatic pixel value of each anti-diagonal line in the sixth panchromatic image of the diagonal line, The seventh color pixel values of each diagonal line in the sixth color image of the diagonal line and the seventh color pixel value of each anti-diagonal line in the sixth color image of the anti-diagonal line are arranged alternately to generate the seventh target image ; or the seventh panchromatic pixel value of each column in the sixth panchromatic image of the anti-diagonal line, the seventh panchromatic pixel value of each column of the anti-diagonal line in the sixth panchromatic image of the diagonal line, and the The seventh color pixel value of each column of the diagonal line in the sixth color image of the diagonal line and the seventh
  • the color filters of each filter group are arranged on the diagonal of the corresponding filter group and in a direction parallel to the diagonal, and the panchromatic filter of each filter group
  • the slices are arranged on the anti-diagonal line of the corresponding filter group and the direction parallel to the anti-diagonal line; the above method also includes: in the second resolution mode, multiple Combining the panchromatic pixels corresponding to each panchromatic filter to read out the eighth panchromatic pixel value of the anti-diagonal line, and generating the seventh panchromatic image of the anti-diagonal line based on the eighth panchromatic pixel value of each anti-diagonal line; and , combining the panchromatic pixels corresponding to the panchromatic sub-filters of the multiple panchromatic filters in the direction parallel to the anti-diagonal in each filter group to read out the eighth panchromatic color of the parallel anti-diagonal pixel value, and generate the seventh panchromatic image of the diagonal based on the eighth panchromatic pixel value of each parallel anti-diagonal line;
  • the eighth target image is generated based on the seventh panchromatic image of the anti-diagonal line, the seventh panchromatic image of the diagonal line, the seventh color image of the diagonal line and the seventh color image of the anti-diagonal line, including: The eighth panchromatic pixel value of each anti-diagonal line in the seventh panchromatic image of the diagonal line, the eighth panchromatic pixel value of each parallel anti-diagonal line in the seventh panchromatic image of the diagonal line, and the diagonal line
  • the eighth color pixel value of each diagonal line in the seventh color image of the anti-diagonal line and the eighth color pixel value of each parallel diagonal line in the seventh color image of the anti-diagonal line are arranged alternately to generate the eighth target image; or , the eighth panchromatic pixel value of each anti-diagonal line in the seventh panchromatic image of the anti-diagonal line, the eighth panchromatic pixel value of each parallel anti-diagonal line in the seventh panchromatic image of the diagonal line, and The eighth color pixel value of each column of the diagonal line in the seventh
  • the principle of generating the sixth target image, the seventh target image, and the eighth target image is similar to the principle of generating the second target image, third target image, and fifth target image, and will not be repeated here.
  • FIG. 12 , FIG. 14 and FIG. 20 are displayed sequentially as indicated by the arrows, these operations are not necessarily executed sequentially in the order indicated by the arrows. Unless otherwise specified in this document, there is no strict order restriction on the execution of these operations, and these operations can be executed in other orders. Moreover, at least some of the operations in FIG. 12 , FIG. 14 and FIG. 20 may include multiple sub-operations or multiple stages, and these sub-operations or stages are not necessarily performed at the same time, but may be performed at different times. The execution sequence of the sub-operations or stages is not necessarily performed sequentially, but may be performed in turn or alternately with other operations or at least a part of sub-operations or stages of other operations.
  • Fig. 24 is a structural block diagram of an image generating device of an embodiment.
  • an image generating device is provided, which is applied to an image sensor, the image sensor includes a filter array and a pixel array, the filter array includes a minimum repeating unit, and the minimum repeating unit includes a plurality of filter groups , each filter group includes only two colors of color filters and panchromatic filters, the amount of light transmitted by the panchromatic filter is greater than the amount of light transmitted by the color filter; the panchromatic filter Sheets and color filters are alternately arranged in each row and column of the smallest repeating unit; each panchromatic filter includes N rows and N columns of panchromatic sub-filters, and each color filter includes N rows N columns of color sub-filters, N rows and N columns of color sub-filters have the same color as the color filter, and N is a positive integer greater than or equal to 2; each pixel in the pixel array and the sub-color of the filter array
  • the optical filter is correspondingly arranged, and the pixel array is configured
  • the readout module 2402 is configured to read out the full-resolution panchromatic pixels from the panchromatic pixels corresponding to each panchromatic sub-filter in the panchromatic optical filter in the full-resolution mode, and read out the full-resolution panchromatic pixels in the color filter The color pixel corresponding to each color sub-filter reads out the full resolution color pixel.
  • An image generating module 2404 configured to generate a full-resolution target image based on each full-resolution panchromatic pixel and each full-resolution color pixel.
  • the panchromatic pixel corresponding to each panchromatic sub-filter in the panchromatic filter is read out to the full-resolution panchromatic pixel, and each color sub-filter in the color filter
  • the corresponding color pixels read out the full-resolution color pixels, and the amount of light transmitted by the panchromatic filter is greater than that of the color filter, which can integrate the information of the panchromatic channel into the image and improve the overall light input , so that based on each full-resolution panchromatic pixel and each full-resolution color pixel, a full-resolution target image with more information and clearer detail analysis can be generated.
  • each panchromatic filter and the color filter are alternately arranged on each row and each column, and each panchromatic filter includes N rows and N columns of panchromatic sub-filters, and each color filter includes N rows and N columns of color sub-filters, N rows and N columns of color sub-filters have the same color as the color filter, and N is a positive integer; and each pixel in the pixel array and the sub-filter of the filter array Slice corresponding setting, that is, each row and each column in the pixel array includes color pixels of each color, which can improve the color resolution of each row and each column of the generated first target image, so that the color of the first target image is more accurate Rich.
  • the above-mentioned readout module 2402 is also used to combine the panchromatic pixels corresponding to each panchromatic sub-filter in each panchromatic filter to read out the first panchromatic pixel in the first resolution mode.
  • the image generating module 2404 is further configured to generate a first target image based on each first panchromatic pixel value and each first color pixel value.
  • each filter set includes a plurality of subunits, each subunit includes a color filter and a panchromatic filter, and the color filters in the subunits are arranged on the diagonal of the subunits , the panchromatic filters in the subunits are arranged on the anti-diagonal lines of the subunits;
  • the above-mentioned readout module 2402 is also used to convert the first target image corresponding to each subunit in the second resolution mode A plurality of first panchromatic pixel values are combined to read out a second panchromatic pixel value, and the above-mentioned image generation module 2404 is also used to generate a first panchromatic image based on each second panchromatic pixel value; the resolution corresponding to the second resolution mode It is smaller than the resolution corresponding to the first resolution mode; the above-mentioned readout module 2402 is also used to combine and read out the second color pixel value corresponding to multiple first color pixel values of the same color in each subunit in the first target image
  • the image generation module 2404 is
  • the above-mentioned image generation module 2404 is further configured to alternately arrange each row of second panchromatic pixel values in the first panchromatic image with each row of second color pixel values in the first color image to generate the second target image; or alternately arrange each column of second panchromatic pixel values in the first panchromatic image with each column of second color pixel values in the first color image to generate a second target image.
  • each filter group includes a plurality of subunits, each subunit includes a color filter and a panchromatic filter, and the color filters in the subunits are arranged on the diagonal of the subunits, The panchromatic filters in the subunits are arranged on the anti-diagonal lines of the subunits; the above-mentioned readout module 2402 is also used for, in the second resolution mode, each panchromatic filter in each subunit The panchromatic pixels corresponding to the color sub-filters are combined to read out the fourth panchromatic pixel value, and the above-mentioned image generation module 2404 is also used to generate a third panchromatic image based on each fourth panchromatic pixel value; the above-mentioned readout module 2402 is also used to In order to combine the color pixels corresponding to the color sub-filters of multiple color filters of the same color in each subunit to read out the fourth color pixel value, the above-mentioned image generation module 2404 is also used to Generate a third color image;
  • the above-mentioned image generation module 2404 is further configured to alternately arrange the fourth panchromatic pixel values in each row in the third panchromatic image and the fourth color pixel values in each row in the third color image to generate the fourth target image; or alternately arrange each column of fourth panchromatic pixel values in the third panchromatic image and each column of fourth color pixel values in the third color image to generate a fourth target image.
  • the above-mentioned readout module 2402 is also used to convert the second panchromatic pixels corresponding to multiple diagonal lines in the same filter set in the first panchromatic image in the third resolution mode Combining and reading out the third panchromatic pixel values of the diagonal lines
  • the image generation module 2404 is also used to generate a second panchromatic image of the diagonal lines based on the third panchromatic pixel values of the diagonal lines
  • the above read The output module 2402 is also used to combine the second panchromatic pixel values corresponding to multiple anti-diagonal lines in the same filter set in the first panchromatic image and read out the third panchromatic pixel value of the anti-diagonal line
  • the above The image generating module 2404 is further configured to generate a second panchromatic image of the anti-diagonal line based on the third panchromatic pixel values of each anti-diagonal line; the resolution corresponding to the third resolution mode is smaller than the resolution corresponding to the second resolution mode;
  • the above-mentioned readout module 2402 is also used to combine
  • the above-mentioned image generation module 2404 is further configured to convert the third panchromatic pixel value of each row of the diagonal line in the second panchromatic image of the diagonal line, and each row of the second panchromatic image of the anti-diagonal line
  • the third panchromatic pixel value of the anti-diagonal, the third-color pixel value of each row of the diagonal in the second-color image of the diagonal, and the third-color pixel value of each row of the anti-diagonal second-color image of the anti-diagonal The pixel values are arranged alternately to generate the third target image; or the third panchromatic pixel value of each column in the second panchromatic image of the diagonal line and each column of the second panchromatic image of the anti-diagonal line are opposed
  • the third panchromatic pixel value of the diagonal, the third color pixel value of each column of the diagonal in the second color image of the diagonal, and the third color pixel of each column of the anti-diagonal in the second color image of the anti-diagonal The values are arranged alternately
  • the color filters of each filter group are arranged on the diagonal of the corresponding filter group and in a direction parallel to the diagonal, and the panchromatic filter of each filter group
  • the slices are arranged on the anti-diagonal line of the corresponding filter group and the direction parallel to the anti-diagonal line; the above-mentioned readout module 2402 is also used for, in the third resolution mode, the anti-diagonal line in each filter group
  • the panchromatic pixels corresponding to each panchromatic sub-filter of a plurality of panchromatic optical filters on the merging read out the fifth panchromatic pixel value of the anti-diagonal line, and the above-mentioned image generation module 2404 is also used for each anti-diagonal line
  • the fifth panchromatic pixel value generates a fourth panchromatic image of the anti-diagonal; and, the above-mentioned readout module 2402 is also used to filter a plurality of panchromatic colors in the direction parallel to the anti-diagonal in each filter group
  • the above-mentioned image generation module 2404 is further configured to convert the fifth panchromatic pixel value of each row in the fourth panchromatic image of the anti-diagonal line to the fifth panchromatic pixel value of the diagonal line, and each row of the fourth panchromatic image of the diagonal line.
  • the fifth panchromatic pixel value of the parallel anti-diagonal, the fifth color pixel value of each row of the diagonal in the fourth color image of the diagonal, and the fifth color pixel value of each row of the parallel diagonal in the fourth color image of the anti-diagonal The five-color pixel values are arranged alternately to generate the fifth target image; or, the fifth panchromatic pixel value of each column in the anti-diagonal line in the fourth pan-color image of the anti-diagonal line, and the fifth pan-color pixel value of the diagonal line in the fourth pan-color image of the diagonal line.
  • each module in the above image generating device is only for illustration. In other embodiments, the image generating device can be divided into different modules according to needs, so as to complete all or part of the functions of the above image generating device.
  • Each module in the above-mentioned image generating device can be fully or partially realized by software, hardware and a combination thereof.
  • the above-mentioned modules can be embedded in or independent of the processor in the computer device in the form of hardware, and can also be stored in the memory of the computer device in the form of software, so that the processor can invoke and execute the corresponding operations of the above-mentioned modules.
  • Fig. 25 is a schematic diagram of the internal structure of an electronic device in one embodiment.
  • the electronic device can be any terminal device such as mobile phone, tablet computer, notebook computer, desktop computer, PDA (Personal Digital Assistant, personal digital assistant), POS (Point of Sales, sales terminal), vehicle-mounted computer, wearable device, etc.
  • the electronic device includes a processor and memory connected by a system bus.
  • the processor may include one or more processing units.
  • the processor can be a CPU (Central Processing Unit, central processing unit) or a DSP (Digital Signal Processing, digital signal processor), etc.
  • the memory may include non-volatile storage media and internal memory. Nonvolatile storage media store operating systems and computer programs.
  • the computer program can be executed by a processor to implement an image generation method provided in the following embodiments.
  • the internal memory provides a high-speed running environment for the operating system computer program in the non-volatile storage medium.
  • each module in the image generation device provided in the embodiment of the present application may be in the form of a computer program.
  • the computer program can run on a terminal or a server.
  • the program modules constituted by the computer program can be stored in the memory of the electronic device.
  • the operations of the methods described in the embodiments of the present application are realized.
  • the embodiment of the present application also provides a computer-readable storage medium.
  • One or more non-transitory computer-readable storage media containing computer-executable instructions that, when executed by one or more processors, cause the processors to perform the operations of the image generation method.
  • the embodiment of the present application also provides a computer program product containing instructions, which, when run on a computer, causes the computer to execute the image generation method.
  • Non-volatile memory can include ROM (Read-Only Memory, read-only memory), PROM (Programmable Read-only Memory, programmable read-only memory), EPROM (Erasable Programmable Read-Only Memory, erasable programmable read-only memory) Memory), EEPROM (Electrically Erasable Programmable Read-only Memory, Electrically Erasable Programmable Read-only Memory) or flash memory.
  • Volatile memory can include RAM (Random Access Memory, Random Access Memory), which is used as external cache memory.
  • RAM is available in various forms, such as SRAM (Static Random Access Memory, static random access memory), DRAM (Dynamic Random Access Memory, dynamic random access memory), SDRAM (Synchronous Dynamic Random Access Memory , synchronous dynamic random access memory), double data rate DDR SDRAM (Double Data Rate Synchronous Dynamic Random Access memory, double data rate synchronous dynamic random access memory), ESDRAM (Enhanced Synchronous Dynamic Random Access memory, enhanced synchronous dynamic random access memory access memory), SLDRAM (Sync Link Dynamic Random Access Memory, synchronous link dynamic random access memory), RDRAM (Rambus Dynamic Random Access Memory, bus dynamic random access memory), DRDRAM (Direct Rambus Dynamic Random Access Memory, interface dynamic random access memory) memory).
  • SRAM Static Random Access Memory, static random access memory
  • DRAM Dynanamic Random Access Memory, dynamic random access memory
  • SDRAM Synchronous Dynamic Random Access Memory , synchronous dynamic random access memory
  • double data rate DDR SDRAM Double Data Rate Synchronous Dynamic Random Access memory, double

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Abstract

L'invention concerne un capteur d'image 21, un module de caméra 20, un dispositif électronique 100, un procédé et un appareil de génération d'image, un dispositif électronique, un support de stockage lisible par ordinateur, et un produit de programme informatique. Le capteur d'image 21 comprend un réseau de filtres 23 et un réseau de pixels 24 ; le réseau de filtres 23 comprend une unité répétitive minimale 230 ; l'unité répétitive minimale 230 comprend une pluralité de groupes de filtres, et chaque groupe de filtres comprend uniquement des filtres couleur 234 et des filtres panchromatiques 233 de deux couleurs ; la quantité de lumière transmise par les filtres panchromatiques 233 est supérieure à la quantité de lumière transmise par les filtres couleur 234 ; les filtres panchromatiques 233 et les filtres couleur 234 sont agencés en alternance dans chaque rangée et chaque colonne ; chaque filtre panchromatique 233 et chaque filtre couleur 234 comprennent tous deux N rangées et N colonnes de sous-filtres panchromatiques de la même couleur, N étant un nombre entier positif ; chaque pixel dans le réseau de pixels 24 correspond à un sous-filtre du réseau de filtres 23, et le réseau de pixels 24 est configuré pour recevoir la lumière traversant le réseau de filtres 23 afin de générer un signal électrique.
PCT/CN2022/124077 2021-12-01 2022-10-09 Capteur d'image, module de caméra, dispositif électronique, et procédé et appareil de génération d'image WO2023098284A1 (fr)

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