A method and device for failed pixel detection

Abstract

The invention discloses a method for detecting failure pixel. The method comprises the steps of carrying out wave filtering processing to input video streams when the video streams are collected and / or transmitted, calculating the difference between the pixel value of each pixel dot before the wave filtering and the pixel value of the pixel dot after the wave filtering in the video stream; comparing the difference and a set threshold value and determining the pixel dot as an failure pixel candidate dot if the difference exceeds the set threshold value; adjusting the explosion time of video collecting equipment, comparing the pixel values of the failure pixel candidate dot before and after the adjustment of the explosion time, determining the candidate dot as the failure pixel dot and storing the information of the failure pixel dot if the pixel values are equal. The invention also discloses a device for detecting the failure pixel. The method and the device of the embodiment of the invention for detecting failure pixel can detect the failure pixel during the normal collection and / or transmission of video streams by the video collection equipment with high detecting speed.

Description

A method and device for faulty pixel detection technical field The invention relates to video processing technology, in particular to a method and device for faulty pixel detection. Background technique At present, with the increasing processing power of computers and the advancement of software technology, image processing, as a cutting-edge application combining computer technology and software technology, is being used more and more in all aspects of production and life. In order to ensure the normal progress of image processing, the basic premise is the detection of faulty pixels, which is the basis and starting point for various image acquisition and processing. Common methods for faulty pixel detection in the prior art are shown in Figure 1, including: Step 101: The video capture device acquires an output signal under a completely black input. Step 102: Comparing the output signal with a set threshold, and the pixels in the output signal higher than the set thres...

AI Technical Summary

Problems solved by technology

When using the existing technology to detect faulty pixels, since the detected video acquisition device needs to be input, the detection process will occupy the device, so that the fault detection method in the prior art cannot be carried out in parallel with any other process

That is, if it is necessary to perform the detection, it is necessary to suspend other ongoing work of the device or wait for the device to be unoccupied before proceeding, which will cause a lower utilization rate of the video capture device

Images