The corresponding size of an SVG image is smaller as compared to that of the bitmap images which are required to achieve the same effect.
要达到同样的效果，SVG图像的大小要小于位图。
How to apply the grayscale effect to the Bitmap image?
如何运用灰度效果的位图图像？
How to apply the grayscale effect to the Bitmap image?
如何运用灰度效果的位图图像？
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