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Graphics Scanned With Scanman Plus Come In Do |
The information in this document applies to:
WordPerfect® 5.1 for DOS
Problem
Symptoms: The customer has a Logitech Scanman Plus and is using dithering. He gets a double dither when he brings the file into WP. Solutions: WP will only half-tone bitmap images that have color information in them. Images that are half-toned are black and white. WP does scale the picture if it is half-toned, which causes the moire pattern that customers see when editing or printing. If you have an image that is already half-toned or dithered, the best way to print it is to make sure that it is not scaled in any way. In WP the way to do this is to make sure the size of the image is the same as it was when scanned and print at the same resolution. It will never look correct in View or Graphics Edit because the screen resolution is lower than the image dpi. The customer's TIFF images show that they are scanned at 200 dpi. If the customer sets the printer resolution to medium, then the image appears grainy. We were able to use a binary editor and change the dpi to 300 and print at high quality. This produced a good quality picture with no moire pattern. The PCX files exported from his scanner are not conforming to standard. When the bytes per line is determined in the prefix, the value assigned is not the same as the one calculated. This causes the horizontal resolution to shift, creating a distorted picture. WP could make changes to accommodate this problem, but will not because it does not occur often. |
Answer:
Details:
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