Real-time digital filter for noise elimination and gamma compensation of thermal equipment

摘要

The present invention relates to a real-time digital filter for noise elimination and gamma compensation of a thermal imaging apparatus that effectively removes noise components effectively and at the same time has a gamma compensation function. , And gamma compensation using a logarithmic amplifier has a problem in stability against temperature. In view of this point, a calculation table storing a calculation result according to a weight and a gamma compensation coefficient, reading out the calculation result stored in the input image data as an address, and outputting the calculation result as output image data, Number frame memory for temporarily storing odd-numbered frame data and even-numbered frame data of the output image data and temporarily storing odd-numbered frame data to be input into the operation format, and inputting the odd-numbered frame data and the even-The noise component can be removed effectively and comprehensively, and the gamma compensation function can be performed.