1. Pretreatment of yellow stern borer image. The paper put the emphasis in image clipping, color counterchanging and image segmentation and so on. As it hard to distinguish rice pest and ambience using by machine vision, image clipping is controlled by user.
水稻三化螟害虫图像预处理，本文着重在图像剪裁、色彩变换、图像分割等方面进行了研究，由于利用机器视觉较难区分水稻害虫与周围环境，所以用人工干预的方法进行图像剪裁；
2. Color-counterchanging can mostly wiped off molestation information caused by color and standout the pest itself.
利用相应的色彩变换最大限度地去除颜色的干扰信息，突出害虫本身。