Binary Image Acquisition Method of CMOS Image Sensor Based on MCU SPI Interface

An Image acquisition device for a CMOS digital image sensor typically uses a high-performance processor or CPLD/FPGA. When the image is gray and its resolution is not high, MCU can be applied. There are many acquisition methods employed. This paper describes a binary image inquiry method based on the microcontroller Serial Peripheral Interface (SPI). Using the SPI interface can decrease requirements for MCU performance and reduce MCU´s frequency. This method is easy to implement gray threshold through hardware and use less system resources.