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Scanning through photoshop 4.0

Posted on 1998-07-22
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Last Modified: 2010-04-03
I am using a parallel port scanner to scan at 300 dpi text documents A4 size but landscape. I have problems resizing it to 640 or 800 pixels (for internet publishing). I have resized (image resize) it to 640 pixels but the text does not seem to be readable. It seems that the text has loss alot of resolution after resizing. The final format saved is a gif file.(would prefer jpg though). The original text document is from a cyclo sytled reproduction (readable but not as good as offset printing. Tried faxing it to Winfax 8 and exporting it to pcx, bmp or tif, result is even worse after resizing. (tried faxing at 150 and 200 (fine) resolutions.
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Question by:kbp
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x30 earned 50 total points
ID: 1116044
Check out if you are scaning in rgb quality, gray scale quality, or b/w quality.
If you are scaning in a b/w quality, no matter what resolution you are using, resizing the image, will cause lot of loss in resolution, try to alway use rgb or gray scale qualities, and when you resize the scannes image with this qualities try to use the anti-aliasing option to obtain more quality, and less resolution loss. The b/w quality is recommendes when you are going to use ocr to convert an image document, to a text document.

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Expert Comment

by:jejsilva
ID: 1116045
Greeting kbp :-)
When you resized the image did you have the constrain porpotions on to keep the aspect ratio?
Why don't you break the image in 4 parts and resize it one by one and then reconstruct the image in the page you are building.
I believe that you will manage what you are looking for.
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Expert Comment

by:eko072398
ID: 1116046
Hi kpb!
Do you know that our computer display monitor only show 72 dpi ?
So even if you scanned the document with 300 dpi, the image shown on the display will be the same with the 72 dpi, but it will be a bigger image in Photoshop. So, if you wanna put the image on the net, the first thing you must do is to change the image dpi to 72 ( the image size will be bigger ).
If the image size is bigger than the image size you wanted, you can:
* Crop the image
* Resize it (contraint proportion)
If the image size is smaller than the image size you wanted, you can:
* Resize it (there will be quality loss), then adjust the levels
* Leave the image, and make montage ( give border, put other image, effects, etc...)
OK, it think that's all. I hope you satisfied!
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by:kbp
ID: 1116047
The scanner was sort of spoilt but we manage to solve the problem with a scsi scanner.
Thanks
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