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Color filter array and the image processing method

A technology of an optical filter array and a color filter array, which is applied to color signal processing circuits, brightness and chrominance signal processing circuits, and image signal generators, and can solve the problems of reducing pixel light sensitivity, image resolution degradation, and poor transition Natural and other problems, to achieve the effect of improving light sensitivity, increasing the amount of light entering, and high resolution

Active Publication Date: 2018-09-07
NINGBO SUNNY OPOTECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But since all pixels receive only monochromatic light, the amount of light entering each pixel will be reduced to one-third of the original, thus reducing the light sensitivity of each pixel
Processing the image in this way will reduce the resolution of the image, the transition between different colors in the image will be unnatural, and slight color abnormalities will appear

Method used

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  • Color filter array and the image processing method
  • Color filter array and the image processing method
  • Color filter array and the image processing method

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Experimental program
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Embodiment 1

[0057] Such as Figure 1A , 1B As shown, the color filter array includes a plurality of color filter arrays 1 arranged in three rows and three columns and transparent filter arrays 2 separating adjacent color filter arrays 1 . Each color filter array includes a red filter unit (R), a blue filter unit (B), two green filter units (G) and 5 transparent filter units (W), four The color filter units are respectively located at the four vertices of the color filter array, and the color filter array is provided with a transparent Filter unit (W). The transparent filter arrays 2 between adjacent color filter units 1 form a row or a column, that is, the transparent filter array 2 is a row of transparent filter units or a column of transparent filter units.

[0058] It is worth mentioning that the red filter unit (R) and the blue filter unit (B) can be in different rows and columns, such as Figure 1A ; It can also be on the same line, such as Figure 1B , or in the same column.

Embodiment 2

[0060] Such as Figure 2A , 2B As shown, the color filter array includes a plurality of tiled color filter arrays 1' with 4 rows and 4 columns and transparent filter arrays 2' that separate adjacent color filter arrays 1'. The filter array 1' includes a red filter unit (R), a blue filter unit (B), two green filter units (G) and 12 transparent filter units (W), four of which are colored The filter units are respectively located at the four vertices of the color filter array 1', and the color filter array 1' is provided with two transparent filter units between the two color filter units in the row direction, column direction and diagonal direction. Unit (W). The transparent filter units 2' between adjacent color filter units 1' are two rows or two columns, that is, the transparent filter array 2' is two rows of transparent filter units or two columns of transparent filter units.

[0061] It is worth mentioning that the red filter unit (R) and the blue filter unit (B) can be ...

Embodiment 3

[0082] Provide a kind of based on embodiment 1 Figure 1A The image processing method of the color filter array is shown, wherein the color filter array is positioned on a pixel array, and the pixel array includes a plurality of pixel units. The image processing method comprises the following steps:

[0083] S01. mark the pixel unit corresponding to each red filter unit (R) as the first pixel unit Rab, and the pixel unit corresponding to the blue filter unit (B) as the second pixel unit Bab, and the green filter unit (G) The corresponding pixel unit is denoted as the third pixel unit Gab, and the pixel unit corresponding to the transparent filter unit (W) is denoted as the brightness pixel unit Wab, wherein a and b are respectively the number of rows and columns where the pixel unit is located, Such as Figure 3A , acquiring the initial monochrome information of the first pixel unit, the second pixel unit, and the third pixel unit, acquiring the initial brightness information...

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Abstract

The invention discloses a color filter array and an image processing method. The color filter array comprises a plurality of M rows and N columns of color filter arrays and a plurality of transparentfilter arrays for separating the adjacent color filter arrays, wherein M is larger than or equal to 3 and N is larger than or equal to 3; each transparent filter array comprises a plurality of transparent filter units; each color filter array comprises at least one color filter unit with a first spectral response, at least one color filter unit with a second spectral response, at least one color filter unit with a third spectral response and a plurality of transparent filter units; and each transparent filter unit is arranged between the color filter units, so that at least one transparent filter unit is arranged between the two color filter units in any direction.

Description

technical field [0001] The invention relates to the technical field of image imaging, in particular to a color filter array and an image processing method based on the color filter array. Background technique [0002] Digital color images usually use three primary colors of red, green and blue to represent colors. In common image sensors, in order to obtain color images, a color filter array (CFA) is usually used to filter light. Usually each pixel on the image sensor is covered with a filter, so that each pixel can only receive one of monochromatic red light, monochromatic green light, and monochromatic blue light. The image obtained after CFA filtering is a Raw image, and the Raw image must undergo color interpolation processing to obtain a full-color image. [0003] There are many types of CFA, the most commonly used is the Bayer-type CFA, which is characterized by the green component accounting for 50%, the red component and the blue component each accounting for 25%. ...

Claims

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Application Information

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IPC IPC(8): H04N9/04H04N9/64H04N9/77
CPCH04N9/64H04N9/77H04N23/10
Inventor 陈振宇孙鑫翔
Owner NINGBO SUNNY OPOTECH CO LTD
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