Patent ID: 8896702
Filing Date: 2014-11-25
Classification: H04N

Abstract:
1. A system for processing digital signals of an infrared image, comprising a field-programmable gate array (FPGA) chip provided on an infrared camera, for processing digital signals of plural-frame infrared images captured by the infrared camera, wherein the FPGA chip comprises: an image process module to, in a frame's backward-stroke, perform a differential weight accumulation process on an original column diagram data representing an original column diagram curve distribution of a current frame image, so as to filter overbright or overdark pixels, and output grayscale value data of a last frame image after being processed by the image process module in a last frame's backward-stroke, wherein the differential weight accumulation process on the original column diagram data performed by the image process module comprises: an image output module connected with the image process module to, in a frame's forward stroke, receive the grayscale value data of the last frame image and perform a grayscale shift process in way of multi-meandering lines on the received grayscale value data, so as to perform different levels of brightness grayscale shift for the grayscale value data on bright or dark side, and output the grayscale value data of the last frame image after being grayscale shifted in way of multi-meandering lines.