效果包括去饱和度，灰度级，反转，亮度，对比度调整，色调，饱和度调整，以及浮雕，虚化等效果。
The effects supported include desaturation and grayscale, inverting, flipping, brightness and contrast adjustment, hue and saturation, embossing, blurring and much more.
图形和背景除了色调不同外，饱和度和亮度也应有区别。如果可能，应尽量避免在彩色背景上运用彩色文本。
Objects and background should vary in brightness or saturation, in addition to hue, and color text on color backgrounds should also be avoided when possible.
色调和饱和度的投影直方图反映了颜色的空间分布，而亮度的投影直方图则体现了图像的形状。
The projective histograms of hue and saturation discribe the color distribution in space, and the projective histogram of intensity reflects the shape of the image.
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