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Color conversion between different ICCs of the printer

2017-07-16

ICC is an internationally-accepted color management system. It is a set of standards that are compatible with various color input and output terminals in order to reduce the color difference and the trueness of color conversion.

Color conversion between different ICCs of the printer

   ICC is an international universal color management system. In order to reduce the color difference and the color difference caused by color conversion, a set of standards compatible with various color input and output terminals is specified; in the photo printer and UV printer or other devices, the color is There are four ways to switch between different ICCs.

Here are:

Perceived, Relative Hue, Saturation, Absolute Hue (found in the photoshop color management panel and converted to profile panel).

perceptualrendering intent

This is the most commonly used conversion method. This method changes all colors in the source device's color space while keeping all colors invariant, but leaves all colors in the overall sense unchanged.

This is because our eyes are more sensitive to the interrelationships between colors and are less sensitive to the absolute value of the colors. It is more suitable for the relatively small CMYK color gamut conversion of the RGB color gamut of the sedan.

Simple understanding: It can be called overall compression. The advantage is that the contrast between all the colors on the image can be maintained.

The disadvantage is that every color on the image changes, and you can often see the overall image become lighter.

It stays bright but the colors are inaccurate.


(media-relative colorimetric rendering intent)

Relative chromaticity is to accurately replicate all colors in a good domain, crop out the colors outside the gamut, and convert the cropped colors to their closest reproducible colors. The relative chroma reproduction intent is a better choice than the perceived rendering intent for image copying because it retains more of the original color. Suitable for conversion between ICCs where the color gamut is not too different, such as: Japanese prepress CMYK's ICC is converted to U.S. ICC.

Simple understanding: try to meet the original. The advantage is that most colors do not change, but the disadvantage is that the individual colors that go beyond the color gamut change greatly.

(saturation rendering intent)

This method tries to maintain the vividness of the color without much concern for the accuracy of the color. It maps the most saturated color in the source device's color space to the most saturated color in the target device. This method is suitable for copying of various charts and other business graphics, or for making maps marked with color height or depth, as well as cartoons and comics.

(ICC-absolute colorimetric rendering intent )

Absolute chromaticity does not map the white point of the source device's color space to the white point of the target device's color space. If the white color of the source device's color space is blue, and the white color of the target device's color space is slightly yellow, when using the absolute color reproduction intent, it will add some blue ink to the output white area to simulate the original white color. The absolute color reproduction intention is mainly designed for proofing, and the purpose is to simulate the copying effect of the final output device on another proofing device.

Simple understanding: simulation paper white, white changes greatly. Not suitable for general routine conversion

It is only used in very few situations and you don't need to master it.

Conversions between different ICCs must comply with these four conversion methods.

At the same time, when we convert an image's ICC file, it is best to look at the different transformation methods to bring about changes to the image.

Select the most suitable conversion method for existing images

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