Study On Digital Image Pre-Processing And Eneryption Technology Based On FPGA

With the development of high-speed of the electronic technology and network, the Real-time image processing in various fields have become increasingly important role. At first in this paper, Research the image processing algorithm, and adopt the FPGA's logic resources to achieve hardware features of the real-time image processing. Second , research the image encryption technology based on chaos theory.This paper is divided into two major parts: Digital image processing and image encryption research. Image Pre-processing part use the median filter to Reduce the image's noise, and use the Laplacian image sharpening algorithm to solve the blurred image problem that due to the filter brought about. The results show that, Two algorithms can get better image information, and can basically reflect the characteristics of the image. Image encryption section for images, introduced for a variety algorithm of image encryption. Then produce the chaotic sequence by Two-Logistic chaotic sequence generator, to achieve Image encryption by scrambling Image pixel value and Scrambling image pixel location.