Talking about: Image Processing Ideas, Methods and Techniques

Image processing is a complex work combining technology and artistry. Not only does the technical staff require the operator to be familiar with the entire printing process and understand the relevant printability parameters, but also the artist needs a high artistic quality and aesthetic concept. Only in this way can we accurately analyze and flexibly deal with all kinds of pictures. If there are errors in the basic color separation parameters of image processing software, the ideas and methods for color correction of image processing personnel are unscientific and the techniques for dealing with various types of images are inflexible. Even if the post-printing and printing processes meet the required standards and specifications, newspaper pictures Quality will also be greatly reduced, so the image processing link can be described as the top priority in newspaper printing. Its ideas, methods and techniques need special emphasis. As follows:

(1) Image Processing Principles

â—† Authenticity and artistry

â—† "color" and "drawing" in parallel

â—† must meet the human visual experience and psychological impression

(2) Preparation before image processing

â—† According to the picture, make the necessary cutting

â—† Determine the size of the picture in the layout

â—† Determine the picture resolution

â—† Determine the picture color mode

(3) Image Processing Ideas

â—† first analyze the characteristics of the picture, retain the advantages, disadvantages to correct; (such as: tone level aspects - normal, thin, thick stuffy, flat, blemishes; color - normal, color cast, special effects of the color; clarity - clarity, blurry)

â—† Adjust the ink first and then partially correct it; (eg, when using masks for local processing, consider the characteristics of its surrounding environment to avoid distortion and inconsistency)

(4) Image Processing Methods and Techniques

â—† First: Adjustment of tone levels and contrast

* Black and White Field Calibration (Levels Tools - Levels)

* Tonal gradation adjustment (curve tool - Curves)

* Correct lack of contrast (brightness/contrast tool)

* Correct dark tone leveling (shadow/highlight tools)

* Correct midtones thickening (exposure tool)

* Correct color cast (Color balance tool - ColorBalance)

â—† Second: color adjustment

* Correct Hue and Saturation (Hue/Saturature)

* Strengthen or weaken color saturation (selective calibration tool - SlelectiveColor) certification

* Locally modified light and dark (lightening, deepening, and sponge tools)

â—† again: sharpness adjustment

* Enhanced sharpness (sharpening tool - UnsharpMask)

* Decreases clarity (blur tool - Gaussinblur)

Due to the poor whiteness and lack of gloss of the newspapers, attention should be paid to the image processing:

(1) The overall contrast is sufficient

(2) Main highlights and dark notes

(3) bright color bright printing accessories, basic color saturation

(4) Sharpening is appropriate and clarity is enough