In this paper, the authors present the design and implementation of image processing applications on Field Programmable Gate Array (FPGA). To improve the implementation time, Xilinx accel DSP, and software for generating Hardware Description Language (HDL) from a high-level Matlab description has been used. Two FPGA-based architectures for image processing have been proposed: color space conversion and edge detection. The designs were implemented on Spartan-3A DSP and Virtex 5 devices. Obtained results are discussed and compared with others architectures.