Re: FLASH: bitmaps quality

[John Croteau]

Hi Vincent.


> >> When i import a bitmap(a JPG) in my flash file and then export the flash

> >> movie the bitmap is not as good as before ; it affects my JPG.

> >> I tried to change the jpg quality (untill 100) in the export dialog but it

> >> doesn't change anything.

> >Whether in Flash or another program generally the best results are only

> >to compress an image once with a lossy compression format such as JPEG.

> >This is especially true with Flash. Keep your image without adding jpeg

> >artifacts (noise) until your final export and you will find that mostly

> >your file will be smaller and image quality better. Import into Flash as

> >bmp or pict file not jpeg.


> Does Flash compress the bitmap in JPEG format himself ?

Flash uncompresses any bitmap picture immported then exports as a jpeg

(default) or lossless bitmap (similar to PNG).  Thes options are set in

library.


> Apparently, it doesn't with another format, if i import a .gif it won't

> compress it again when i export my movie, isn't it ?

Any pre-compression (lossless or lossy) is irrelavent to the the

pre-exported bitmap in Flash. Flash applies either JPEG or lossless

compression only to the expanded uncompressed image derived from the

bitmap import.


Note, Gif is not necessarily a lossless compression format if colors are

changed on export. The prep for Flash is based not on the file size

reduction in the Gif export but in the reduction of noise and unneeded

details in the image.


-----------                               -----------------------

John Croteau

croteauerols [dot] com (mailto:croteauerols [dot] com)

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