This is mainly used when proofing colors. In other words, use Abs Col when trying to get one printer to look like another printer - including perhaps the darker white of the original for example if proofing a newsprint.
Relative Colorimetric tries to reproduce colors with as little desaturation as possible. Out of gamut colors are moved to the nearest point within gamut.
Unlike Abs Col, colors are all scaled to the white point of the destination color space. With Perceptual, colors are generally desaturated in order to preserve their perceived relationship.
This can make for very smooth transitions between colors. For example, the bluish-white color gray is not replaced by paper white. Situations when exact colors are needed and visible borders are not distracting. Absolute Colorimetric. Pure Primaries - Uses pure colorants, free from contaminating colorants that are introduced when color management tries to match the appearance of a color on image systems with different color capabilities.
Note: If you experience tone reproduction problems, use the Photographic setting. Rendering intent Best used for Equivalent ICC rendering intent Photographic - Typically results in less-saturated output than presentation rendering when printing out-of-gamut colors.
Image, Contrast, and Perceptual Presentation - Creates saturated colors but does not match printed colors precisely to displayed colors. Saturation, Graphics Relative Colorimetric - Provides white point transformation between the source and destination white points. Relative Colorimetric Absolute Colorimetric - Provides no white point transformation between the source and destination white points. Absolute Colorimetric Pure Primaries - Uses pure colorants, free from contaminating colorants that are introduced when color management tries to match the appearance of a color on image systems with different color capabilities.
When source content is made up of one or two process colorants, they remain as one or two process colorants in the final print.
This rendering intent does not achieve colorimetric accuracy, and content is not expected to match that of other print systems. Pure Primaries. Therefore, the driver changes those out-of-gamut colors to colors it can actually hit. The method it uses to do this is a Rendering Intent. You can see it in the Photoshop CS3 print window see the accompanying image sample.
If you open up that drop-down menu you will see there are four options…. Perceptual: The Perceptual Rendering Intent is a good option for photographers. When using this option, the driver will take the out-of-gamut colors and move them to the closest in-gamut colors, which is a good thing. It will then shift the in-gamut colors so the relationship between all the colors remains the same. The Perceptual Rendering Intent will change that blue to a blue that it can hit.
However, it will also change the red even though it could reproduce it because it is in gamut so that the relationship between the red and blue is maintained. Most color gamuts get larger when you go to lighter colors. Therefore, in order to bring colors in gamut and maintain relationships the Perceptual Rendering Intent will often lighten or de-saturate the image. It is the best rendering intent for printing transitions and gradients because its main goal is to preserve the color relationships.
Therefore, a gradient moving from dark blue to light blue will appear smooth with this rendering intent. Relative Colorimetric: The Relative Colorimetric Rendering Intent is also a good option for photographers, but it comes with certain risks.
Relative Colorimetric will also move the out-of-gamut colors to the closest in-gamut color. However, it will not change any of the in-gamut colors. The Relative Colorimetric Rendering Intent will also change that blue to the closest blue it can hit, but it will not change the red that is in gamut.
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