3. Image sharpening. The first step in image processing is to sharpen and adjust the blur caused by the scan. This is called “correction sharpening†because adjustment of the sharpening function affects the change in tone value and color. I saw many operators sharpening the image after the color correction and adjustment of the gradation, resulting in changes to the corrected color and tone values, especially the small dots and dark areas of the high-light area. The dots have become larger and there has been an increase in image contrast. It is necessary to re-examine and adjust the highlight and dark tone values. Therefore, sharpening should be performed first, followed by tone adjustment and color adjustment to adjust the value. Therefore, sharpening should be performed first, and then tones and color adjustments. All the gradations and color changes caused by sharpening are corrected together. At the same time after completing the overall adjustment of the tone and color correction, before the image is stored, make some appropriate sharpening adjustments, called "target sharpening", it is also necessary, this is mainly a loss of clarity after the compensation process printing Degree, and to compensate for the lack or excess of the first step "corrective sharpening", adjusted to the visual point of view, the clarity of the image is slightly emphasized too much, which is extremely beneficial to maintain the quality of the final print. 4. Gray balance adjustment. One of the keys to copying a color image is to restore the gray in the original and use the gray balance data as a guide to correct the color cast of the original. (1) Grasp the company's gravitational proofing adaptability and electric carving curves. The Y, M, and C primary color versions obtained through experiments show neutral grey data after superimposition with different dot area ratios. (2) The focus of the gray balance adjustment is: the need for high-gloss white, 25%, 50%, 75% of the four parts of the white and gray tone, the gray balance ratio value must be accurate, because the gray tone of these four parts is very Sensitive, slight error, it will cast color. (3) Practical experience, gray balance dot value ratio, should be slightly warmer color, gray tone slightly warmer, visually comfortable, especially in many packaging products in the white porcelain bowl, white porcelain cup and other white utensils, slightly The warmer white-gray tone effect will be better. (4) In some gravure platemaking companies, the author uses the Indian, Indian ink, OPP film and other suitable conditions, which are generally: Highlight part: C is greater than Y, M1%; 25% part: C is greater than Y, M3%~4%; 50% part: C is greater than Y, M5%; 75% part: C is greater than Y, M4%. As shown in Table 1: 93 90 80 75 70 60 50 40 30 25 20 10 6 5 55 8 1. All texts, pictures, audio and video presentations of “Source: China Packaging Network†are marked on this website, and the copyright is exclusively owned by “China Packaging Networkâ€. If you need to reprint, please indicate the source. Any media, website, or individual must indicate "source: China Packaging Network" when reprinting. Violators of this site will be held accountable according to law. 2. The manuscript reproduced and noted by other sources is intended to convey more information for readers and does not imply endorsement of its views or the authenticity of its contents. When other media, websites, or individuals re-publish from this site, they must retain the source of the manuscript noted in this site, and must not arbitrarily tamper with the origin of the manuscript and take legal responsibility. 3. If the reprinted version of this website involves copyright issues, please contact China Packaging Network immediately or by email. Contact information Pvc Horse Fence,Vinyl Ranch Fence,Black Pvc Horse Fence,3 Rail Vinyl Horse Fence ZHEJIANG DEQING GONAT FENCE CO.,LTD , https://www.gonatpvcfence.com
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