Self-adapting detection and correction method of fixed-pattern noise based on sCMOS camera

Abstract

The invention relates to a self-adapting detection and correction method of fixed-pattern noise based on an sCMOS camera, belonging to the field of image sensors and signal processing. The destructive problems such as defective pixel, dark signal nonuniformity, photoresponse nonuniformity and dark current which are caused by the fixed-pattern noise to an image of the sCMOS camera are solved. According to the imaging characteristics of an sCMOS sensor and the generated reason and characteristic analysis of the fixed-pattern noise, a self-adapting threshold detection algorithm formula of the fixed-pattern noise is designed, meanwhile, the average manner of multiple dark field images is utilized to reduce time domain noise, by a result obtained via detection, 3*3 median filter algorithm correction is carried out on the fixed-pattern noise one by one, and effective filling treatment is carried out on an edge. The method can be used for quickly and conveniently realizing the self-adapting detection and correction of the fixed-pattern noise of the sCMOS camera, the processing speed is fast, the destructive degree to the image can be effectively reduced, and the image quality is greatly improved, so that the method has a very good use value in the field of scientific research of cameras.

Description

technical field [0001] The invention belongs to the field of image sensor and signal processing, in particular to the realization of an adaptive detection and correction algorithm based on sCMOS camera to improve image quality and fixed noise. Background technique [0002] With many technical advantages such as high sensitivity, high resolution, high readout speed and deep cooling, sCMOS cameras have incomparable advantages in high-throughput screening and DNA sequencing, and also provide customers with the best in other scientific research fields. s Choice. No one is perfect, although the effect of sCMOS camera itself is outstanding, but due to the excellent high light sensitivity of sCMOS camera, each of its photosensitive diodes needs to be equipped with an amplifier. If it is calculated in terms of megapixels, it needs hundreds of Tens of thousands of amplifiers, but the amplifier is an analog circuit, it is difficult to keep every result consistent [1，2] , so its fixe...

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Problems solved by technology

[0018] The present invention proposes an adaptive detection and correction method based on the fixed noise of the sCMOS camera. The purpose is to improve the image quality and solve the problems c

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