基于嵌入式应用的高分辨率农业图像采集节点设计

Development of High-resolution Agricultural Image Capture Node Based on Embedded System

针对现有农业图像采集设备分辨率低且无法调节图像效果的现状,提出一种基于ARM、CMOS图像传感器和嵌入式Linux操作系统的高分辨农业图像采集节点的设计方案。设计了采集节点的硬、软件体系结构,实现了图像传感器驱动控制,可进行5种白平衡、7级亮度、5级对比度、5级饱和度的图像采集效果控制。试验结果表明,本采集节点能进行2 048像素×1 536像素的图像采集,并能较好地控制图像的白平衡、亮度、对比度、饱和度等像素效果。所设计节点具有体积小、成本较低等特点,可广泛应用于农业图像采集。

Since the current agricultural image sensor was low resolution and lack of adjustable control function, a high-resolution agricultural image capture node was designed based on ARM, OV hardware platform, and embedded Linux operating system. Both the hardware and software architecture of the image capture node were designed, the node could be controlled easily. It had better control function than traditional image sensor, which had five kinds of white balance control mode, seven levels of brightness, five levels of contrast and five levels of contrast and five levels of saturation effects. It could satisfy the needs to control image acquisition, and provided a convenient remote dynamic application in different scenarios to adjust image capture effects. Experimental results showed that the node could capture the 2 048 pixels × 1 536 pixels of image. It also had the advantages of small volume and low cost. This node could be widely used in agricultural image capture, particularly suitable for wireless image sensor networks, crop images and video in real-time monitoring.