On 16 Mar 2007, at 17:12, Scott Rossi wrote:
Recently, Dave wrote:
I need to export a snapshot in a non-compressed format, from looking
at the documentation I can export in the following formats:
JPEG
GIF
PNG
PBM
PGM
PPM
JPEG is no good for what I want since it is lossy. GIF is no good
because it only supports 8 bit color and I need 24 bit (if not 32 bit
with Alpha Channel) I'm not sure what PBM, PGM or PPM are?
I believe these are formats for Unix but someone else may know better.
Which
leaves PNG which uses lossless compression, however what are the
defaults for the image? (Pixel Size, Component Size etc.).
Not sure what you mean by 'defaults' but if you have a 400 x 300
image, it
will export with those dimensions at (I believe) the native display
resolution. I don't believe there are any configurable settings
for PNG.
Also, you may not want to rule out JPEG. Depending on what your
app does, a
JPEG image with minimum compression (JPEGQuality = 100) should have
very
minimal loss. If you need alpha channel support, however, PNG is
your only
option.
Regards,
Thanks Scott, this for TV broadcast equipment and 100% cannot have
any loss of data. For the PNG option I meant what is the Pixel Size
for the PNG file? 8 Bit, 24 Bit or 32 Bit? The documentation says it
will output an alpha channel but I not sure how it decides to do this?
All the Best
Dave
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