Descreen is a procedure to remove halftone patterns in the background of a scanned image, which usually happens when you scan a magazine or newspaper. You can configure how the descreening should be done with the Descreen tab. (Enterprise Only)

Do Descreening after Scan:

Art-Copy’s descreen function supports removing moiré patterns or any other type of halftone that appear in a scanned image. This is usually more predominant in scanning printed media such as newspapers, magazines, or even lithograph documents. In order to better remove these optical interferences from the scanned document you will need to select the source material being scanned. From the selection you can best gauge your needs upon the lines per inch of the source material being scanned, or by using our size proportions also displayed in the source material drop down. These selections will be applied to the image after the scan of the document has completed during the post scan image processing.

Source Material:

This combo box lets you choose the type of source material used for a scan. It takes longer to descreen material that has greater matrix. Try several options to ensure the best quality image being created after the descreening has been applied to the image.

High Quality/High Speed:

High quality descreening will take longer, but will give you better results. High speed will make descreening faster. To get the best descreen result, you should scan the material in 300 dpi resolution for high speed and 400 dpi resolution for high quality.

Text Edge Reservation:

Sometimes after descreening, the text edge of the image may appear blurred. You can adjust the level of Text Edge Reservation to reduce the blurring, but still maintain the descreen result.

Sharpen image after Scan/descreening:

Most often after a successful descreening has been applied to an image the crispness of the image may be lost to a somewhat blurred after effect. This is due to the descreening process applying a calculated blur to the image during the scanning process in order to counter the affects of a moiré pattern or any other halftones have had on the image.

In order to correct this blurred effect sharpening the image is suggested. By sharpening the image the crispness of the image will be reapplied allowing the high-resolution image quality to be restored. Depending on the type of descreening pattern applied the sharpness of the image may need to be calibrated for each type of material you scan. You most likely will want to try this sharpening several times before deciding on the exact settings to stay with during the entire descreening process.

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