How to determine the color ratio through the dot

When we do design, we often encounter some scanned manuscripts, but scanning into the computer often finds that the colors are different from the originals of the scanned ones due to scanning or display. The re-adjustment will also find that the colors printed or printed are not the same. . Some people will make adjustments through chromatography, but it is more troublesome. Through practical experience, I summed up a relatively effective method and introduced it to everyone here. The method is to roughly estimate the color value by using a magnifying glass to observe the dots.

Now give an example to illustrate in detail: After scanning the computer draft, click on a certain position in the picture with the siphon tool in PHOTOSHOP, check the color value, and then carefully observe the dot with a magnifying glass (approximately 10-15 times magnification) in the same position in the original picture. There will be three The result: if the two neighboring dots are separated, the color value can be temporarily determined to be less than 50%; just joined together is 50%, and the two dots dissolve together, and is determined to be greater than 50%.

The second step, if separated, can estimate the separation distance. If the distance between two dots is within the diameter of a dot, the estimated color value is between 25% and 50%, which is larger than the diameter of a dot, at 0%. ～25%; if dissolved together, the distance between the two dots is less than the radius of the dots, then the color value is between 50% and 75%. If the fraction is greater than the radius, the color value can be estimated from 75% to 100%.

The third step is to subdivide the color values ​​on the basis of the above.

If you want to view the screens in four colors, you can compare the approximate color with the manuscript on the computer. If the colors are not the same, you can adjust them without adjusting. If the difference is too large, you need to adjust the curve. In addition, when the curve is adjusted, it should be noted that the entire image should have a level, that is, the darkest place should have more than 75% black, and the entire image must feel breathable. Of course, this is not the only criterion. It is mainly the actual experience that is most important. In addition, look at a few local colors, because the scanner scans are usually the best in the middle, and the surrounding effect is worse.

However, we must pay attention to the fact that the spot color version can't see the dot. Its color is usually viewed through chromatography. If you are familiar with it, you can directly estimate the approximate color. This requires some experience.

If you want to get a very good scanning effect, it is best to go to a professional scanning company to scan, professionally called "electricity".

Source: Tianma Hotline