{{{{{ Scaning Printied Images }}}}}

K
Posted By
k
Jan 6, 2004
Views
218
Replies
3
Status
Closed
Dear All:

I am using Photoshop 7 in PC.
I know once we print any image using CMYK, it is converted to Half-tone. So, when we scan, we can get half-tone dots. so, it is not good to use the same printed scan image to send for CMYK printing. But if we do not have any choice, what techniques we should use during scanning the printed image and what tools in Photoshop to be used to make the printed scanned image more sharp?

Thanks..

– Kal


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Warren Sarle
Jan 6, 2004
"news.attcanada.ca" wrote in message
I am using Photoshop 7 in PC.
I know once we print any image using CMYK, it is converted to Half-tone.
So,
when we scan, we can get half-tone dots. so, it is not good to use the
same
printed scan image to send for CMYK printing. But if we do not have any choice, what techniques we should use during scanning the printed image
and
what tools in Photoshop to be used to make the printed scanned image more sharp?

Use your scanner’s descreening option.
If that doesn’t suffice, get a plug-in that does FFTs, e.g. http://www.reindeergraphics.com/tutorial/chap4/fourier13.htm l

And please don’t put all those braces in your subject line.
JC
J C
Jan 6, 2004
On Tue, 06 Jan 2004 05:29:35 GMT, "Warren Sarle" wrote:

Use your scanner’s descreening option.
If that doesn’t suffice, get a plug-in that does FFTs, e.g. http://www.reindeergraphics.com/tutorial/chap4/fourier13.htm l
And please don’t put all those braces in your subject line.

Or the cheap solution using just the filters in PS:

Scan at 1.5 times the ending resolution that you will be using.

Use gaussian blur at 1.9 pixel radius and about 75%

Use the Unsharp mask filter

Downsample the dpi to the desired resolution.

Eyeball whether you want to run the unsharp mask again.

— JC
JC
J C
Jan 7, 2004
On Tue, 06 Jan 2004 06:36:02 GMT, J C wrote:

On Tue, 06 Jan 2004 05:29:35 GMT, "Warren Sarle" wrote:

Use your scanner’s descreening option.
If that doesn’t suffice, get a plug-in that does FFTs, e.g. http://www.reindeergraphics.com/tutorial/chap4/fourier13.htm l
And please don’t put all those braces in your subject line.

Or the cheap solution using just the filters in PS:

Scan at 1.5 times the ending resolution that you will be using.
Use gaussian blur at 1.9 pixel radius and about 75%

Use the Unsharp mask filter

Downsample the dpi to the desired resolution.

Eyeball whether you want to run the unsharp mask again.

— JC

Ah… That should have been 1.9 pixel radius for the Unsharp mask filter. sorry

— JC

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