RE: HIGH Quality PNG files

[John Dowdell]

> The images are originally made as either tga's, pcx's or jpg's....


This means that at least some of them are compressed before they get to

Photoshop, which can be difficult when later compressing again in Flash.



>the end product is still noticeably of lower quality than the original


In the previous post you said they were "grainy and blurry". That could be

one way to describe double-compressed JPEG. Another tipoff might be if

there were small rectangles seen in the image.



One way to test whether it's the transfer itself that's at cause here would

be to isolate away the source imagery. Suppose you make a test pattern in

Photoshop -- such as by selecting each of the RGB channels in turn and

giving them their own gradient -- and then saving out from Photoshop as

PNG.


If this shows the same type of difference after the JPEG recompression in

Flash then we could assume that the original imagery likely plays little

role. But if the test images work fine, yet the original TGA/PCX/JPG don't,

then the source images would likely hold the key to the cause.



I'm also not sure whether PNG always uses JPEG-style compression or not

after export from Flash... PNG is highcolor like JPEG, but lossless like

GIF. My own PNG come out well, and I'm not yet sure of the difference

there.


Hmm, one other thought, to get the browser out of the loop... when you

choose the "Test Movie" option from the Control menu in Flash 3, check

whether this SWF looks different from the first SWF in any way. That might

be another way to cause the difference.


jd









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