Moire Prepress Image Processing And Its Elimination
Moire is because the data grid overlap arising from the conflict has tainted the
interference reticulate, usually produced three stages of image processing. This will damage the overall quality of the image of strength, introduce several ways to eliminate moire.
Print Network HC Moire is because the data grid overlap arising from the conflict has tainted the interference textured.
Generation Moire Moire image processing are usually three stages in the production.
1. Scanning highly detailed texture Example, in scanning the image on the texture of the fabric, it will produce moire, which is Scanners Itself caused. Scanner sensitive enough to read the details, the resulting moire existed in the scanned image into, and almost can not be removed.
2. Output angle is not correct screening
Multi-color image to the wrong angle of output plus net, print out the press on the image will appear on moire. In addition, if the screening point of not using the optimal value, but also result in moire.
3. Scanning the image pre-screening Scanning the images have been printed, scanned photographs or transparencies on less than the kind of continuous tone information, but the halftone dot. Network scanner to identify some of the space between, but not copied or convert into a continuous tone as a result, the image with moire. This situation can use several techniques to reduce or eliminate moire.
Elimination of moire Below the overall quality of the image based on the degree of damage, followed by description of several methods to eliminate moire.
A scanning halftone images to reduce moire
Scanning black and white halftone images, the following steps can often eliminate the space between outlets.
1. To minus twice the normal resolution of 10 pixels of resolution to scan images. For example, if a general resolution to 300dpi scanning halftone images, Now they are 590dpi scans.
2. In Photoshop, select Filter Blur GaussianBlur (filter fuzzy Gaussian blur). The image damage the filter, so you should only use a lower value, the radius of the pixels in the 0.7 to 1.2 should be sufficient.
3. Select Image ImageSize (image image size).
4. In ImageSize dialog box, select the "ConstrainProportions" (limited scale) and "ResampleImage" (re-sampling the image) of two options, you can change the resolution without affecting the width and height, then the interpolation set set into a "Bicubic" (bicubic).
5. In the Resolution (Resolution) field, enter 300.
6. Click "OK", half the resolution, may remove the 3 / 4 of image pixels. Usually this will also remove most of the patterns.
7. Assessment of the image. If the dot pattern is sufficient to reduce, to continue the work of other editors. If not, then the next step.
8. Re-assessment of the image. If there are still a small number of textured, apply Filter Noise Despeckle (filter variegated speckle).
Two rotary manner to eliminate moire
Scan pre-screening of the color image, not only in a channel of tortoises
Moire Prepress Image Processing And Its Elimination
By: weihua
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