AS3：如何更改颜色的位图的的BitmapData以黑人和白人？ [英] AS3:How to change a colored Bitmap's BitmapData to black and white?

问题描述

我如何更改 AS3的彩色位图的为黑白这两个BitmapData ？ 我正在开发一个简单的图片编辑工具，一个CMS闪光灯。

How can I change the bitmapdata of a coloured Bitmap to Black and White in AS3 ? I'm developing a simple image editor tool for a CMS in flash.

人们应该能够上传的位图的颜色转换为黑色和白色。 我想这两个BitmapData本身改变这样我就可以把它写入与Adobe的JPGEn codeR类的ByteArray之后。

People should be able to switch the colour of the uploaded Bitmap to black and white. I want the bitmapdata itself to change So I can write it to a ByteArray with Adobe's JPGEncoder Class afterwards.

推荐答案

这将是最完美的解决方案我presume（与源是你的BitmapData ）：

this would be the most elegant solution i presume (with source being you BitmapData):

const rc:Number = 1/3, gc:Number = 1/3, bc:Number = 1/3;
source.applyFilter(source.bitmapData, source.bitmapData.rect, new Point(), new ColorMatrixFilter([rc, gc, bc, 0, 0,rc, gc, bc, 0, 0, rc, gc, bc, 0, 0, 0, 0, 0, 1, 0]));

与 flash.geom ::点和 flash.filters使用:: ColorMaxtrixFilter ...

的ColorMatrixFilter 让很多事情，如色调的变化，colorisation，减轻，变暗和饱和度等...否则的BitmapData :: paletteMap 和的BitmapData ::的ColorTransform 是很好的补充......

ColorMatrixFilter allows many things, such as hue shifts, colorisation, lightening, darkening and desaturation and so on ... otherwise BitmapData::paletteMap and BitmapData::colorTransform are good complements ...

只是想注意，使用以下

const rc:Number = 1/3, gc:Number = 1/2, bc:Number = 1/6;

看起来多了几分自然的，因为主观上，＃00FF00 比＃FF0000 ，这又是光明的比＃0000FF

looks a little more natural, since subjectively, #00FF00 is brighter than #FF0000, which in turn is brighter than #0000FF

吉祥话......）

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