Re: FLASH: Importing Jpegs

[John Croteau]

Hi SWIRAL,


> Just want to know what setting people are importing JPEGs and gifs

> into Flash for the best quality.

For best quality don't use the jpeg format to store a bitmap image

before importing into Flash. JPEG is a lossy format and always creates

visual changes when an image is saved. It creates artifacts that make

using JPEG on the same image less effective resulting in poorer quality

when recompressing an image a second time with JPEG.


Importing lossless versions of bitmaps in BMP, PICT, PNG or GIF formats

will normally result in better quality with smaller file size than if

you have imported a .jpg image.


There are no import setting of bitmaps in Flash.

Export options include the choice of Losslees or JPEG format, setting of

the amount of JPEG compression and smoothing. These options can be set

individually for each bitmap in the Library.


Use the following conditioning tips for bitmaps to get the best quality

bitmaps with the smallest file size on export from Flash.


1) Pre-condition by reducing unneeded detail (noise).

2) Pre-condition by reducing unneeded variation in color.

3) Lossless compression of files before importing into Flash makes no

difference (positive or negative) in Flash as Flash works only with the

fully expanded version of the bitmap (as all graphic programs do).

4) Color reduction (for instance in GIFs) only make a difference as it

affects the image as per 1 & 2 above.

5) Impoting images compessed with JPEG or ones that have been processed

with jpeg or other lossy formats is normally counter productive.

6) Check to see the size of the Lossless export is smaller than jpeg or

at an acceptable size to merit its use. Note, lossless will always be of

better quality than JPEG even when JPEG is set at 100.


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

John Croteau

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

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