从RGB到HSV色彩空间转换公式的修正

The revision of conversion formula from RGB color space to HSV color space

针对从RGB色彩空间到HSV色彩空间的转换方式为非线性变换,会产生奇异点和不稳定点的问题,对转换公式作了修正.原公式在饱和度为零时色度未定义,在低饱和度时色度不稳定,这些情况下色度为黑色、灰色或者白色,将色度分量的低值区域和高值区域分别用来表示黑白色或者偏黑和偏白的低饱和度色.不但能够消除色度奇异点和不稳定点,而且可以用单纯H分量来表述色彩图像的主色调信息,简化了图像计算的复杂度.通过分析和实验验证,方法是有效的.

The conversion from RGB color space tO HSV color space is non-linear, singular points or unstable points could arise in hue component of HSV color space. A revised formula is provided to solve this problem. Original formula does not define hue value when saturation value is zero, and hue value is nonsense when saturation value is low. Under these conditions, the color is black, gray or white. Redefining these non-color or gray points in hue component＇s low and high area, not only eliminated singular points and unstable points, but also simplified image processing by present dominant color in one hue component. Through theoretic analysis and experimental verification, this revised formula is proved to be effective.