[Coco] Coco3 CMP color swatches

[Robert Sherwood]

You'll have pretty much the same set of problems as trying to use a film or 
digital camera with a TV screen/monitor.  Unless your card is vastly 
different from those I've seen, the screen capture is made according to the 
final output image actually seen on the screen - as controlled by the 
colour balance in the card's display software.  I've done caps from normal 
NTSC video, and if I've happened to change the colour balance between them 
even 2 caps of the exact same frame will be different.

Of course, you also have to consider the effects of converting the image to 
GIF or JPEG as well.  The only way I know to be certain of having perfect 
colour reproduction in a digitized image is to provide it in a 24-bit 
uncompressed format (such as BMP or TIFF.  PNG might work - I'm not as 
familiar with that.)

All that being said, I think it's certainly worthwhile to go ahead with the 
experiment and see how the results compare to the previous MESS 
screenshot.  It's probably also worth it to try the same with the digital 
and film cameras as stated sometime earlier.  Although with film, the 
printing process introduces way too many output variables to be very 
accurate for producing swatch-like samples.  Either slides, or a scan from 
negatives would be the best option here.

--Rob

At 07:53 PM 8/28/2005, you wrote:
>Hi,
>
>Now that is a fresh idea, and one that I like a lot.
>
>I have one of the circuits that will convert the CoCo 3 RGB output to TV 
>S-Video which will provide a much better signal into the Digitizer.
>
>See my message "The Best Monitor for a CoCo 3 is a TV. (Really!)"
>
>My HDTV PCI Tuner Card,  "MyHD", has a S-Video Input and single frame / 
>field capture capability.
>
>Thus I may be able to do this much better than anyone else.
>
>Thanks a Lot!
>
>Stephen H. Fischer
>
>Allen Huffman wrote:
>>On Aug 28, 2005, at 4:35 AM, Stephen H. Fischer wrote:
>>>If a digital camera could do a better job, much better than what I
>>>made
>>
>>What happens if you just grab a frame using a TV digitizer? (With
>>composite inputs.)
>>
>>         -- Allen