Shunguang original and copying requirements
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The Shunguang photographic original (hereinafter referred to as the Shunguang original) is such that when the incident angle of the light coincides with the photographing angle, the projection and shadow of the light are behind the object to be photographed, and the scene toward the lens is illuminated by the same brightness. A work photographed using this light angle is called a smooth original.
Due to the relationship between the angle of light used in the photo original, the picture has the common features of clarity, texture and uniformity as well as soft and pleasing to the eye. The character's smooth original has the characteristics of natural and true shape, full facial expression and even skin, delicate and textured. In particular, the image of Shunguang elderly has a certain role in concealing and beautifying the image. Scenery smooth original, the picture has the characteristics of uniform brightness, true color, natural and coordination. The person or landscape original photographed by Shunguang also has the characteristics of tone, color uniformity and moderate contrast, which is used to copy the ideal original.
However, since the smooth original is not conducive to the sense of space, perspective and stereo in the scene, the picture lacks obvious tone configuration and contrast, and the contrast effect of the whole picture is not strong enough, just the inherent tone level of the landscaping, color Matching and the like constitute an overall uniform picture. The face of the character's original manuscript is flat and elegant, and the color contrast lacks strength. Even some people's smooth originals (including some flash-photographed originals), due to the angle of light exposure or improper exposure processing, not only cause a lot of loss of facial level, color can not be reproduced, the skin color of the characters forms a "big white face", the whole picture is distorted It appears to be dull and loses the inherent characteristics of a smooth original. Shunguang scenery original, due to the equal relationship of light illumination, the foreground, mid-range and distant view in the picture lacks level change, and the contour, tone level and color change of the scene are realized by the inherent form of the scene itself, so in the picture Inevitably lacking the contrast of light and contrast, it will inevitably lose the sense of three-dimensionality and perspective, and the whole picture looks flat.
Another shortcoming of the Shunguang manuscript is that when the scenes of many characters and scenes are displayed, the characters in front and behind are easily overlapped, affecting the full reproduction of the number and personality, and losing the sense of "breathing".
Therefore, in prepress processing, desktop system operators should not only have exquisite skills, but also have the ability to analyze, research and appreciate the manuscript, grasp its inherent characteristics or existing defects, and closely combine with the prepress. The effective function, printability and conditions of the processing equipment are processed to obtain the best copying effect, so in the prepress processing, the following points should be grasped for the smooth original.
1. On the basis of maintaining the brightness, uniformity and level of the picture, the picture clarity is moderately and accurately emphasized, but not excessive. If the adjustment is over-adjusted, although the picture clarity is effectively improved, there will be embossed marks on the screen, which directly affects the gentleness of the original and the true color of the original.
2. When dealing with a straight manuscript with a person as the main body, it is necessary to keep the facial expressions of the person's face natural and true, and the skin is even and delicate. At the same time, special attention should be paid to the finishing of some defects on the face of the person to prevent further exposure of the defect and affect the copying effect. The specific situation of the face of the person as shown in Figure 1. The amount of color used in the yellow and magenta versions should be moderately increased in the prepress processing to improve the actual effect of the skin color of the person.
3. For the large-scale scenery and smooth originals shown in Figure 2, the following three relationships must be grasped in the prepress processing: one must deal with the tone configuration relationship between the foreground, the middle scene and the distant view in the picture, consciously The prospects should be deeper and appropriate; the medium-level gradation ratio should be properly opened; the prospects should be undulating. Second, we must deal with the color matching relationship of the foreground, medium and long-term perspectives, and make the foreground color more appropriate; the amount of the middle scene should be appropriate; the vision should be brighter. Third, in the large-scale scenery and smooth manuscript, if there are people in it, the color of the person should be handled, the relationship between the color of the clothing and the background, and the color configuration should be properly opened with the background, and harmony should be achieved to prevent There is no perspective or color jump between the character and the background.
4. For the bright-adjusting smooth original as shown in Fig. 3, in the pre-press processing, the large-area bright and uniform, clean and bright and smooth originals are maintained, and the large-area brightness is uniform, clean and bright in the pre-press processing. On the basis of the above, pay attention to the integrity of the picture, the middle tone or the dark tone part should be appropriately colored, in order to maintain or properly emphasize the contrast of the picture tone, so that the overall picture remains bright and flat, complete and dark and not too frivolous. Copy effect.
5. In the color processing, it is necessary to maintain the inherent characteristics of the overall color of the smooth original. Therefore, in prepress processing, the amount of color of the basic colors in the main color tone system of the screen should be appropriately increased, so that the entire screen achieves relative saturation and real effects in color configuration and color usage.
6. On the basis of maintaining the smoothness of the original, the texture and the color, it is necessary to make the total tone of the yellow, magenta and cyan versions longer, which is beneficial to improve the overall contrast of the picture and the contrast of the color, and to enhance the stereoscopic image. Visual effects of sense, perspective and space.
7. Pay attention to emphasize the contrast of the picture. In the prepress processing, we must consciously emphasize the brightness of the picture, especially the bright and sub-bright to be bright, and some small bright spots can be absolutely net, in order to maintain the clear and pleasing effect inherent in the smooth original. The dark part must be darkened to keep the picture stable.
In short, before the prepress processing, it is necessary to fully analyze and study the smooth manuscript. By grasping its characteristics, we should give full play to the advanced functions such as “creative light” of the desktop system equipment, and make efforts to avoid weaknesses in specific operations. Improve the production and reproduction level of the smooth original.