How to remove the alpha channel of PNG

There are many ways to remove Alpha channels from PNG. Designers can use ps or fireworks.
Why remove the alpha channel for PNG images? An Image usually consists of rgba4 identification bits, which are called 32bit images. Currently, most mobile devices use flash to create applications, which cannot effectively support alpha channels. images are 24bit. Therefore, if PNG is used for mobile application development, the alpha channel must be removed to achieve the first optimization.

Here is a simple method:
1. Download pngcrush tool, address http://pmt.sourceforge.net/pngcrush

2. Run the following command: pngcrush-CC originalwithalpha.png newwithoutalpha.png

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in this topic, you need to say that if your application is constructed using a flex framework, do not use swfloader to read a SWF file with stage3d. The specific reason is:
the stage3d API is the underlying programming interface of Flash Player 11. All stage3d objects do not belong to displayobject.
while swfloader is in the MX. Controls package, it inherits from the displayobjectcontainer class.
therefore, if you load a stage3d SWF in a swfloader, you will never see the correct result.