Fpga-based Pseudo-color Image Processing System

In real life, the image contains a lot of color information, color information is rich, and one according to which color information can identify the information as expressed in things, even though the eye itself, the information will be able to distinguish the gray, but gray degree of information out of the image itself, to express the amount of information, after all, is limited,color images are expressed in some of the characteristics of gray-scale images that are not able to speak out. In the real world on many occasions, such as medical, industrial, multi-media technology, visual and so on, are often interested in the color image expressed by the color information, while such a multi-media effects of more people to extract a useful amount of information, more its easy to make the right judgments. In reality, conditions or limitations of other instruments, we often get only a gray-scale image, gray-scale image because of too little color information can not meet our required information, so study the image gray-scale image to color transformation becomes a great practical significance and practical value.The selection of topics is the Yunnan Provincial Science and Technology Agency project "food safety traceability system," in some of the work, while participating in the company in 2009 ALTERA Electronic Innovations Design Contest held in the topic of "FPGA-based image processing terminal of food safety engineering" in some of the work This system is mainly addressed by FPGA will be processed into a grayscale image color information is more color-rich images, namely, "FPGA-based pseudo-color image processing system" design. Grayscale images of the color information to play an enhanced role in the adjustment.In this paper, to Altera Corporation and Taiwan Friends of the crystal co-developed for the DE2-70 development board platform, to use the current more mature image processing algorithms, using hardware and software co-design method, image processing and programmable embedded technology linked with SOPC together to develop FPGA-based image processing system. System based on Altera's DE2-70 multi-media platform resources to SD card as memory, storage, have to deal with grayscale images, the gray-scale image from the SD card to read the digital manner, while stored in the SDRAM, the re-In the NiosⅡIDE environment, write algorithm processing program will handle the final outcome of Youyi BMP image formats stored on the SD card, and VGA monitors display processing results. The system of pseudo-color image processing applications implemented on FPGA can be cut, scalable, can be upgraded with software and hardware system programmable functions. System implementation by SD memory card BMP format images to form encoded digital information stored in the SDRAM, through pseudo-color processing algorithm will be re-processed images are stored in the SD card, while VGA to achieve pseudo-color processing results are displayed to the button means to achieve the realization of the multiple images display the integration of SOPC system switch.SOPC system was designed to IP (Intellectual Property)-based, hardware description language as the main design tool, with the help of computer as a platform for EDA tools, automation and intelligence to top-down manner. SOPC design tools have required software and hardware co-design and a complete and strict co-verification capabilities. Through the final results to be processed to achieve the algorithms of data comparing results. Through the SD memory data, decoding, processing and display, making the image storage simple and convenient. Using QuartusⅡ8.0 and SOPC builder design software design components, timing and functional simulation, using SOPC Builder to quickly build hardware systems, while taking advantage of NiosⅡprocessor system can be configured features, flexible design memory and peripherals to make the system to build more flexible, and enables software and hardware co-development, making the system more efficient structures, but also provides a new embedded system design.