*图像颜色空间转换
*RGB->HSV
dev_close_window()

*读取图像
read_image(src,'../../resources/images/cat.jpg')
get_image_size(src,width,height)
*提取RGB图像的R、G、B通道
decompose3(src,R,G,B)

* RGB转换HSV
trans_from_rgb(R,G,B,H,S,V,'hsv')

compose3(H,S,V,hsv)

dev_open_window(0,0,width,height,'black',src_win_handle)

dev_display(hsv)