Blind pixel detection method for infrared image

Abstract

The invention belongs to the technical field of infrared thermal imaging, discloses a blind pixel detection method for an infrared image, and particularly relates to a blind pixel detection method based on Y16 video data. The specific blind pixel detection method is characterized in comprising the following steps that: a: calculating the maximum value, the minimum value and the mean value of eachpixel in a time domain for the Y16 video data collected by a black body to obtain a maximum value matrix, a minimum value matrix and a mean value matrix; b: calculating the difference of the maximum value and the mean value of each pixel and the difference of the minimum value and the mean value, selecting a maximum difference value from the two differences to be compared with an infrared image pixel threshold value, and judging whether the pixel is a blind pixel or not; c: locally adding a window to the mean value matrix for traversing, calculating a standard difference in the window, and detecting excessively bright or dark pixels which are not detected in b; and c: utilizing a "3[Sigma]" principle to judge whether the current pixel is the blind pixel or not, revising a judgment condition, and if the current pixel is judged as a dead pixel, carrying out labeling. By use of the characteristic that time domain and airspace characteristics are combined to detect the blind pixel of the infrared image, the time domain characteristics of the blind pixel are considered, and the airspace characteristics of the blind pixel are considered. By use of the method, sparkling blind pixels can be effectively removed.

Description

technical field [0001] The invention belongs to the technical field of infrared thermal imaging, and in particular relates to an infrared image blind element detection method. Background technique [0002] In infrared imaging technology, due to the technical problems of the focal plane detector, there are always problems of blind elements, such as the state of the detector unit being too bright, too dark, flickering, or invalid. In order to form a good imaging effect, it is necessary to detect and replace the blind pixels in the imaging. [0003] However, most of the traditional detection methods use the features in the definition of blind pixels to judge the pixels of uniform scene imaging at different temperatures. The detection of dark or completely invalid pixels is effective, and the effect on flickering pixels is not obvious. [0004] Therefore, the present invention proposes a blind pixel detection method for infrared images, which utilizes the characteristics of th...

AI Technical Summary

Problems solved by technology

[0003] However, most of the traditional detection methods use the features in the definition of blind pixels to judge the pixels of uniform scene imaging at different temperatures. The detection of dark or completely invalid pixels is effective, and the effect on flickering pixels is not obvious