一种ARM Cortex-M3 MCU的图像采集与JPEG压缩系统设计

为了实现低速(一般低于250Kbps)条件下图像数据传输的目的,提出了一种基于ARM Cortex-M3 MCU平台上控制CMOS图像传感器的嵌入式视觉系统的硬件设计和软件设计方案。在硬件设计方面,采用先进先出存储器最大限度降低了硬件设计复杂度,解决了低价格MCU内存小的问题。在软件设计方面,MCU下位机程序实现了图像数据采集、插值处理和JPEG压缩,并通过串口,SD卡、TFTLCD等接口输出压缩的图像数据。PC端上位机程序实现了图像数据的获取、显示和保存,并提供了图像传感器寄存器配置、分辨率以及JPEG压缩比等参数修改的功能。

A Compression Vision System Based on ARM Cortex-M3 MCU

This paper introduces the hardware and software design of CMOS sensor based on ARM Cortex-M3 MCU. The FIFO memory is used to reduce the hardware design complexity and solve the problem of low memory capacity of low cost MCU. The raw data from the sensor is collected, interpolated and compressed by the firmware. And the compression data can be transferred to UART, SD and TFTLCD interface. Addtionly, the host progame is also designed, it provids the funcation of colecting data, displaying and saving the image, sensor registers configuration, image resolution and compression ratio of JPEG file adjustment.