During the procedure of real–time image processing, FPGA is often utilized to preprocess the collected digital image. This project looks at how to process the Bayerdata, which comes from Micron MT9V112-1/6-Inch SOC VGA CMOS DIGITAL IMAGE SENSOR. The study first introduces the bad pixel correction of Bayerdata, the procedures of converting an image from the Bayer format, to an RGB888 format and RGB888 images denoising methods. The paper then examines the data from an image preprocessing module based on Verilog HDL via Matlab. The discovery demonstrates that this module can successfully process 640x480 pixels with desirable real-time results.