色调差异
Tonal difference
以上为机器翻译结果，长、整句建议使用 人工翻译 。
根据阴影与非阴影区域间存在色调差异，利用HSV彩色模型，提取可能阴影区域。
According to hue difference between shaded and non-shaded regions, possible shaded regions were extracted by HSV color model at first.
youdao
应用推荐
模块上移
模块下移
不移动