Infrarotbildverarbeitungsvorrichtung

摘要

The present invention provides an infrared image-processing apparatus capable of binarization processing in response to the change of the brightness histogram. The image-processing unit of the image-processing apparatus executes a binarization processing for an infrared image using a threshold brightness value determined in the previous processing, and calculates the area ratio P. When the binarization area ratio P is below a prescribed value alpha (%), and if the threshold brightness value is not the minimum threshold brightness value Min_TH, the threshold brightness value ITH is reduced by subtracting a predetermined ratio. Similarly, when the binarization area ratio P is above a predetermined value beta (%), and the threshold brightness value does not agree with the maximum threshold brightness value Max_TH, the threshold brightness value is increased by incrementing a prescribed value to the threshold brightness value ITH.