NONUNIFORMITY CORRECTION METHOD AND APPARATUS FOR THERMAL IMAGING SYSTEM

摘要

The present invention relates to an image non-uniformity correction technology of the thermal imaging equipment that enables real-time implementation of a clear image without blurring of an image even in a still image in correcting image non-uniformity of a micro-scanning thermal imaging equipment.;The object of the present invention is a first step of normalizing the micro-scanned frame video signal to a median of the maximum dynamic range of the A / D converter; A second step of multiplying the normalized processed video signal by a gain coefficient in units of pixels, adding an offset coefficient to the resultant value, and performing denormalization to output a pixel signal having a non-uniformity corrected form; Based on the corrected pixel signal, an average value of four adjacent pixels, which are adjacent to each other (up, down, left, and right) is obtained and set as a reference value. The difference value between the reference value and the value of the currently output pixel signal is obtained, and the difference value is an error value. Outputting a third process; A fourth process of calculating the gain coefficient and the offset coefficient in a direction in which the error in the (n + 1) th frame is reduced by reflecting the error value in the correction coefficient update is achieved.