TAILIEUCHUNG - Photoshop cs5 cho nhiếp ảnh gia part 20

Sửa chữa màu: The Tab / HSL Grayscale L HS / Grayscale tab (HS L là viết tắt của hue, độ bão hòa, và độ sáng) là một công cụ rất trực quan cung cấp khả năng tinh chỉnh từng nhiều màu sắc trên một loạt các thông số. | The Color Noise Reduction sliders reduce color noise the unexpected color variations that often appear. Although this noise is most common in the darker tonalities it can also sometimes be seen as green and magenta blobs in areas that should be neutral gray and as rainbow artifacts in the highlights. Again zoom to a 100 or 200 view of the areas demonstrating problems with noise and move the sliders to reduce the color variations. Make the minimum adjustment necessary to decrease the noise. The Color slider determines the amount of color noise reduction to apply. The Color Detail slider enables you to refine the color noise reduction that is applied to thin detailed color edges. Higher settings will retain more color detail in the edges but may cause more color noise to remain. At lower settings more color noise suppression is applied but this may result in thin edges becoming desaturated or in color bleeding. We tend to use the Color Noise Reduction sliders in ACR to remove as much color noise as possible when noise is an issue. 114 Photoshop ONLY CHAPTER 3 ADOBE CAMERA RAW Correcting Color The HSL Grayscale Tab The HSL Grayscale tab HSL is short for hue saturation and luminance is a very visual tool offering the ability to fine-tune each color range on a variety of parameters. For example you can modify the yellows so that they are closer to orange or closer to green. You can also adjust the saturation of the yellows and then the luminance or lightness darkness of them. This means you can make subtle or not-so-subtle adjustments to individual color ranges in your image without affecting other colors. When you click the Hue Saturation or Luminance subtabs the eight color range sliders change to gradients as shown in Figure indicating how moving the slider will change the appearance of the colors. You set each color individually. Figure By using the HSL controls Ellen Ehe-tuned the colors in this sunflower image. Clicking the Saturation or Luminance tabs .

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