Image sensor, camera module and electronic equipment

An image sensor and pixel group technology, applied in the field of image processing, can solve problems such as excessive noise and image deterioration, and achieve the effect of suppressing image noise, reducing noise components, and improving user experience

Active Publication Date: 2021-03-12
VIVO MOBILE COMM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, when the image algorithm in the ISP is used to process the raw image, more noise is often introduced, resulting in image deterioration

Method used

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  • Image sensor, camera module and electronic equipment
  • Image sensor, camera module and electronic equipment
  • Image sensor, camera module and electronic equipment

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0031] Example 1, considering that when the ISP passes through the Lens Shading module, the imaging brightness due to the characteristics of lens shading becomes darker from the center to the four corners. Therefore, this embodiment calculates the brightness gain matrix required to compensate for lens shading, and then The luminance gain matrix is ​​mapped to each of the amplifiers to realize the lensshading compensation function at the image sensor end. That is, in this embodiment, the amplification factor of each amplifier can be determined according to the luminance gain matrix, and the luminance gain matrix is ​​to perform brightness uniformity on the raw image output by the image sensor through an image processor (ISP). calculated. As a result, the lens shading compensation function on the image sensor side can be realized to reduce noise components from the front end, avoiding the lens shading compensation processing on the ISP side, suppressing image noise, and improvin...

example 2

[0033] Example 2, if both the first sub-pixel and the second sub-pixel are green photosensitive pixels (such as Gr, Gb), the amplification factor of the first sub-amplifier is different from that of the second sub-amplifier. For example, if the Gr channel and the Gb channel are processed with different magnifications, although the resolution of the image sensor is sacrificed, the dynamic range of the image sensor can be improved. It can be understood that the closer the signals of the Gr channel and the Gb channel in the image sensor are, the higher the resolution of the image sensor is, and the better the image quality of the image signal output by the image sensor is.

[0034] Wherein, the amplification factor of the first sub-amplifier is different from the amplification factor of the second sub-amplifier may include: there is a multiple relationship between the amplification factor of the first sub-amplifier and the amplification factor of the second sub-amplifier ( fold d...

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Abstract

The invention discloses an image sensor, a camera module and electronic equipment, and relates to the technical field of image processing. The image sensor comprises a pixel array and a plurality of amplifiers, the pixel array comprises a plurality of pixel groups arranged in the row direction and/or the column direction, each pixel group comprises a plurality of pixels with different colors, andthe amplifiers are in one-to-one correspondence with the pixels; the input end of the target amplifier is connected with the output end of a target pixel, the output end of the target amplifier is connected with a column line where the target pixel is located, the target amplifier is any one of the amplifiers, and the target pixel is a pixel corresponding to the target amplifier.

Description

technical field [0001] The application belongs to the technical field of image processing, and specifically relates to an image sensor, a camera module and electronic equipment. Background technique [0002] With the popularization of mobile terminal products, the market competition of mobile terminal products is becoming more and more fierce, especially in the aspect of taking pictures of smart phones, for example, the improvement of the image signal-to-noise ratio of smart phones. [0003] In related technologies, when improving the image signal-to-noise ratio, on the one hand, it is by improving the true signal-to-noise ratio of the image sensor (sensor) as much as possible; Noise when the image algorithm processes the raw image output by the image sensor. [0004] However, when the image algorithm in the ISP is used to process the raw image, more noise is often introduced, resulting in image deterioration. Contents of the invention [0005] The purpose of this applic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/225H04N5/357H04N5/369
CPCH04N23/54H04N23/57H04N23/55H04N25/60H04N25/70H04N25/778H04N25/772H04N25/10H04N25/51
Inventor 李沛德胡孔明
Owner VIVO MOBILE COMM CO LTD
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