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Capter 5. Line Art Scanning > Photoshop Can Fake It

Photoshop Can Fake It

Line art file sizes will vary depending on which file format is used. The preceding images were saved as TIFF files with LZW compression turned on. LZW compression is ideal for images that contain large areas of solid color. The 1,200ppi image above would have been 410KB if LZW compression had not been used.


If your scanner is not capable of using a resolution setting as high as you need, you can have Photoshop increase the resolution of the image and add the extra information your scanner couldn't deliver. To do this, scan with the highest resolution setting available, and then choose Image > Image Size. Select the Resample Image check box, set the pop-up menu to Bicubic (that's the kind of math Photoshop will use to add information to your image), type the resolution of your printer in the Resolution field, and then click OK. Remember, your image must be in Grayscale mode; otherwise, this step will not improve image quality. This step is unique to line art images; if you were to increase the resolution of a photographic-quality image, the result would appear blurry. In the case of line art, the extra information will not harm the image, because we're going to convert it to a pure black-and-white bitmap, which is incapable of appearing blurry.


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