Treatment of Landscape Originals in Prepress Production

There is a type of manuscript used in printing manuscripts - landscape type manuscripts. Generally, this type of manuscript requires a strong contrast between color and light and shade, a higher color saturation, a longer tone, and a darker version, so that the produced printed matter is effective.

For the separation of landscape manuscripts, the black version only plays a role of outline, usually heavier in the middle tone and dark tone, showing the level of this part, and the main colors are through the cyan, magenta, and yellow plates. appeared. The general emphasis on normal landscape manuscripts is mainly focused on highlights and midtones. At the same time, the saturation of colors is required to be good. Therefore, when we are making landscape manuscripts, we can appropriately sacrifice some dark tone levels, and we must make the mid-light level rich and colorful. Brightly colored. When dealing with landscape manuscripts, another important place is clarity. During the production, it is necessary to add some sharpening to enhance the small changes in the objects and make the scene clear.

Some landscape manuscripts are dominated by colors. This requires ensuring the vividness and contrast of colors. In landscape manuscripts, generally for sky processing, it is hoped that the sky will appear blue, the composition of the yellow version will be as small as possible, the black version will not have dots, and the main color version will be the cyan version, especially the clear sky. For the treatment of the grass in the manuscript, it should be noted that the main color version of the grassland is the cyan version and the yellow edition, the yellow version is generally larger than the cyan version, and the degree of the yellow crest is determined according to the season. Generally, the spring grassland is tender green and the yellow The Daqing version is much more, up to 50% to 60%. When the grass reaches the end of the summer, the green becomes darker. The gap between the Qingban and the Huangban becomes smaller, about 20%, and the Magenta version has a certain dot. .

When dealing with landscape-type originals, it is also important to observe the shooting of the original. The method of processing is also different for different manuscripts. Below we analyze three different situations.

1. Overexposed manuscript

The feature of this type of manuscript is that the main body of the image is concentrated in the bright and midtone highlights, the dark tone level is small, the density is small, the contrast is not enough, and the color saturation is insufficient, and the image looks white and bright.

When dealing with this kind of manuscript, it is necessary to pay attention to the processing of the intermediate tone and the dark tone. To increase the density of the dark tone in the intermediate tone, this improves the contrast of the image and enriches the level. The saturation of the color will also be corresponding. Get improved.

2. Underexposed manuscript

The feature of this type of manuscript is that the main part of the image is concentrated in the dark and dark tone parts, the overall darkness, the density is too thick, and the dark tone is even more severe.

For the processing of this type of manuscript, it is mainly necessary to brighten the image as a whole, reduce the density of the dark tone in the middle tone, and reduce the middle tone part to enrich the midlight tone level. In the adjustment process, it is necessary to pay attention to changes in the high light portion. , Note that the area of ​​the net-free part must not be too large.

3. Normally exposed manuscript

This kind of manuscript has a normal level of image, large contrast, good hue saturation and vivid colors, and is an ideal manuscript. During processing, normal scaling is sufficient, and care must be taken to sharpen the edges, do some edge sharpening, or do some Unsharp Mask to enrich the subtle levels of the image.

Actually, similar to other types of manuscripts, it is necessary to pay attention to the setting of black and white field dots and the control of gray balance. According to the characteristics of landscape manuscripts, the percentage of outlets in Baichang is: 3% for C edition, 2% for M edition, 2% for Y edition, and 0% for K edition; the percentage of outlets for black court is: 95% for C edition, M edition 90 %, 90% for Y, 85% for K.

The black and white fields are set correctly, and normal contrast can be obtained; gray balance can be controlled to avoid color shift. These two points are very important for image processing. Only by doing the two can we get good images.

Source: Longjiang Printing Network

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