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Smooth Scanning Tips

Smooth Scanning Tips

Postby s. sengupta » Sat Nov 16, 2002 1:01 am

Selecting Scanning Area:-Always preview the document and select just the area to be scanned,instead of scanning the full document.This will reduce the scanning time as well as the size,especially when scanning at high resolutions.
Resist Scanning At High Resolutions:-If you intend to scan your documents only to view them onscreen,scanning at a resolution between 100-150 dpi is enough as monitors can only display 72 dpi.Scanning documents at higher resolutions only result in a larger file size.If you are scanning a document for faxing or OCR-ing,200-300 dpi is sufficient and for printing photos,300-600 dpi is fine.For photo scanning,keep the setting at the maximum colour depth that your scanner supports.
Use Descreen:-When you scan content from magazines or newspapers,you will notice a lot of moire' (converging and diverging lines)on the scanned image.The best way to reduce this pattern is to use the Descreen option,you can use the Descreen option in the scanner software.If your scanner software does not have a Descreen option,you can use an image editing software.
Image Format:-Select an image format depending on where you will be using the image.If you will be using it for the web or for animation,save it as JPEG or GIF-these compressed formats save a lot of hard disk space.On the other hand,if you are scanning the image for print,TIFF is the best format as it compresses the image without loss in image quality.
Correct Ghost Images:-A ghost image occurs when the scanner picks up images from the back of the page.This can usually be corrected by changing the darkness and contrast settings.Experiment to find the best settings for your scanner.Another simple way to correct this is to place a thick white paper over the document being scanned.
Adjust brightness,contrast and sharpness:-Many a times the scanned image turns out to be dull.This can be easily fixed through the TWAIN driver(if your scanner supports it)or through the image editing software where you can adjust the contrast and brightness levels.
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