Standard Frame Size
12-Apr-93 00:59:35
Sb: #28853-Standard Frame Size
Fm: Erik Flom 71204,407
To: Vince Pilgrim 71333,1371
Yes, glad to catch you again!
I did the tests I said I would on the JPEGs you UL'd.
The results were quite interesting. . . .
The Gamma settimg of 1.0 looked best, though it was a little dark and
oversaturated. (As was the picture of Toria.)
By combining the output of the Toaster processed signal & the original
JPEG in ImageMaster, I was able to create a bitmap showing ONLY the
difference between the 2 images. The results were a virtually black screen
– indicating very little degradation in the processed signal. I then ran a
'Histogram equalization' on the image to optimize contrast on the data.
The results showed that the greatest signal degradation occured in the
high frequency portions of the image – the VERY SAME areas that would
suffer the greatest artifacting from the JPEG compression.
Please, do E-Mail me one of your test signals and maybe another 'real
world' image in TARGA, TIFF, or PCX format for testing. (I can resize it
from your default of 640×480 to the Toaster default of 752×480. I think
the standard aspect ratio for Toaster pixels is 1.1:1.)
I'll E-mail you the results of my tests, and upload the Terminator JPEG
into AmigaArts 24 bit files for general consumption.
D-2 is digital COMPOSITE video (8 bits @ 4xColor SC). D-1 is digital
component video (4:2:2 Y/R-Y/B-Y).
BTW, What's with this 24 bit per color per pixel stuff? Isn't that a skosh
extreme for NTSC? :^) (Just curious.)
Keep On Toastin'
Erik Flom