Dead pixel processing method and system for image sensor

Abstract

Embodiments of the invention disclose a dead pixel processing method and system for an image sensor. The method comprises the following steps: presetting a mapping table of bad cluster types and interpolation algorithms; detecting and storing position information of a dead pixel and bad cluster type information corresponding to the dead pixel; and looking up the dead pixel in a collected image according to the position information of the dead pixel, selecting a matched interpolation algorithm in the mapping table according to the bad cluster type information corresponding to the dead pixel, and using the interpolation algorithm to carry out interpolation processing on the dead pixel. According to the dead pixel processing method and system for image sensor provided by the embodiments of the invention, bad clusters are classified according to a distribution type of peripheral dead pixels, different interpolation algorithms are adopted for different bad cluster types corresponding to the dead pixels, thus each dead pixel can obtain an optimal interpolation result, and then the dead pixel processing effect of the image sensor is improved.

Description

technical field [0001] The invention relates to the technical field of image sensors, in particular to a method and system for processing dead pixels of an image sensor. Background technique [0002] An image sensor is a device that converts an optical image into an electronic signal, and is widely used in fields such as photography, image acquisition, and industrial measurement. Generally, an image sensor includes a large number of photosensitive units, and each photosensitive unit corresponds to a pixel in an image output by the image sensor. [0003] Due to reasons such as the manufacturing process, transportation or storage methods, some photosensitive units of the image sensor are damaged and cannot normally receive light. The pixels corresponding to these photosensitive units that cannot normally receive light in the image are called dead pixels. Among them, the dead pixels mainly include the following three types: 1. Dark dots, which are mainly caused by the complete...

AI Technical Summary

Problems solved by technology

[0008] Embodiments of the present invention provide a method and system for processing dead pixels of an image sensor, so as to solve the technical problem in the prior art that the processing effect of dead pixels is poor, which leads to poor imaging effect of the image sensor

Images