Choosing fit picture as background picture in whole picture preface row, adopting picture matrix difference to do away with the object such as machine hull and ruler, then attaining picture with only seeds.

• 在整个图像序列中挑选合适的帧图像作为背景图像,运用图像矩阵差分去除排种器壳和标尺等对象,再将差分矩阵变换成只含种子的图像。