Design Of Color Recgnition System Based On MT9M111

With high-speed and automated development of modern industrialproduction, the color recognition task in which the human eye hasplayed a dominant role in the past, will be implemented by the more andmore appropriate color sensors. For the traditional color sensor, theindependent photoelectric diode is covered by a revision of the red,green, blue filter, and then the output signal is processed to identify thecolor signal. While, machine vision technology becomes so mature thatit has insteaded the complex and backward way of color recognition.Machine vision technology is widely used in the field of productteseting and quality control. In the view of the high precision, higherefficiency and digitization demand to the color measurement in ourleather industry, this paper presents a design of color recognitionsystem based on MT9M111.With the CMOS digital image sensor–MT9M111as the frontimage capture sensor, this scheme chooses the low cost and highperformance Cyclone Ⅱ seies FPGA–EP2C8Q208C8as the core ofimage capture and transmission platform， and uses the EZ-USB FX2LPseries chip–CY7C68013A for the collected single frame of imagedata’s transmission to PC. While, the image color recognitionpeocessing software is developed on the LabVIEW platform, which isconvenient to measure the target’s color features.This paper does not only expound how the FPGA chip as the corecontroller complete the image capture and transmission, but alsointroduces a self-develped color recognition system software based onLabVIEW. On the hardware design, it mainly contains the followingthree parts: the section of EP2C8Q208C8core control, the part ofMT9M111’s image capture, the EZ-USB FX2LP communication and transmission part. For firmware design, becase of the MT9M111’s workmode is configurated through the I2C bus, so the CMOS image capturemodule is designed according to the MT9M111’s collection timing.With the help of this module, the collected signle frame of image data iscached in the SRAM. While the image transmission part, according toCY7C68013A’s Slave FIFO synchronous transmission principle andtiming relationship, the Slave_FIFO module is designed, which ensuresthat the collected single frame of image data transmit to the PC rapidlyand stably, makes the subsequent operation of image color recognitionmore conveniently. In the software part, the design of EZ-USBcommunication is developed base on Visual C++6.0; and in order toshorten the whole development cycle, the design of image colorrecognition is developed based on LabVIEW.Experimental results show that the scheme proposed in this paperis reliable and feasible. The Color recognition software based onLabVIEW tests out the sample image’s RGB histogram, and calculatesthe similarity between the standard samples. In this way, enough anddirect reference datas are provided for the subsequent further colorrecognition.