Full color advance.

A bit brighter note: If a picture looks different when printed on the screen, agrees with the color something is wrong. "Color Photo" explains how to get the maximum quality of his pictures can bring out.

 

Photography is not as simple as ever: record, edit on the computer, and then ... The big surprise: The expression in the photo has a color on the computer and the little fellow saturation. Responsibility is the color, or rather the lack of an accurate color, and perhaps the wrong color.

Indeed, always a color to use, though often not the best: There is no input from the user's operating system manages the equipment and the corresponding color.

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Is there no color, it uses basically the lowest common denominator, the "sRGB" color. A perfectly acceptable solution for those who are already in JPEG format photographs and any red-eye or a crooked horizon correct. But if you are on maximum quality and the best possible color emphasis should not be satisfied.

Background color

From the photo to print many devices come with as many different color is used. Remedy to create color, the colors of each device and define the transformation into independent Zwischenfarbräume it. They come with the standard profile of the ICC (International Color Consortium) to be used? ICC profiles mentioned. The operating system must be prepared for each device in the processing chain such a profile, so that a reproducible color can be reached.

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Color Photo 1 / 2009

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Two such profiles, everyone has seen that already in the depths of his camera has dug settings: sRGB, short for Standard RGB, and AdobeRGB, the larger space, which can display more colors. Both are so-called device-independent color spaces. They do not describe the gamut of a digital camera or a monitor, but are for the exchange between devices with different colors thought. As the name suggests, color, both on the color with the three basic colors red, green and blue. Mixed together showed all three colors white.

sRGB - the lowest common denominator

The variety of devices with their respective colors makes compromises inevitable. The sRGB color makes for the bulk of computer users Least problems. It contains all the colors that everyone should be able to monitor display. There is also every color in the position, all defined by sRGB colors on paper.

The problem is: Fotoprintere can usually considerably more color. And as good as any current monitors surpass the gamut of sRGB far. Digital cameras are distinguished in the theory once more colors on a monitor and printer can represent. Only Apple's Safari browser dominates the other dealing with color longer. The open-source Mozilla Firefox browser may be in the new version also? However, users must explicitly color in a confusing configuration interface on. In the best case, with more color photos in programs without color simply too little from saturated. In the worst case, the true color is no longer agree with the target. Those who are not aware of color busy getting in the use of different color than sRGB trouble sooner or later.

FARBMANAGEMENT - LEXICON

Farbabtrennung

How many colors in the image with smaller color actually lost, it is proof of the capabilities of Photoshop quite simple test. They shoot a RAW image that as many rich colors. Then the RAW 16-bit RGB Prophoto image opened in Photoshop. The Gamut warning in the View menu shows there is gray, where the colors of the set target color can not be displayed. In the jargon of this phenomenon is called "clipping"? because the colors would be cut. As the target color is defined
Then for comparison once again AdobeRGB and sRGB. Both are widely available colors are not mapped. AdobeRGB has especially in orange, but also some green and yellow problems. For further compounded sRGB orange and blue tones to the nichtdarstellbaren colors.

Calibrate

No matter how great the color is? a binding means the color is not. It requires only a correct configuration of the monitor. However, the Monitor also fehleranfälligste device in the processing chain. Because the manufacturer cheaper, in itself good monitors are seeking to expand in the exhibition rooms of Media Markt and Co with überschärften and oversaturated images hervorzustechen. For professional monitors certainly looks different, but few are willing to Matt comparatively small slices for 1000 euro and more to purchase. However, the trouble with a lot of photographs drawn from the monitor to look reliably. Remedy the calibration of the monitor. Previously this was expensive special hardware is required, now manages the already quite adequate affordable devices such as the Spyder 3 Pro for about 150 euros. The included software sets the white point of the monitor largely automatically and adjusts it to the ambient light. For many monitors are on top of manual settin!
gs in circulation. They are, however, with caution, because even two monitors of the same type a different color behavior. Moreover, such attitudes do not take into account that the ambient light changes again.

CMYK - RGB

Cameras and scanners to digitize their records in RGB color space by mixing the three basic colors red, green and blue, which together result in white. Monitors and projectors also set to RGB. The print edition is on the other hand, the operating principle color with the basic colors cyan, magenta, yellow and black used. Black is just a practical and would complement purely arithmetically not necessary because, together, a mixture of rich CMY Black revealed. In practice this is not ideal because of the colors on a non-ideal base hardly possible. Many types of paper do not tolerate any color 300-percent (100 percent per color). Moreover, the additive mixture of black comparatively expensive, because you will need the triple ink.
The Unbuntanteil of mixed colors can be replaced in print, depending on the saturation of up to 100 percent black job.

Colors according to figures: CIE L * a * b *

The Commission Internationale de l? Éclairage (CIE, in English: International Commission on Illumination) 1931, developed the CIE XYZ color space, the totality of human-perceivable color density. The now common CIE L * a * b *- color of 1976 is based on CIE XYZ? the distances between the colors are, however, unlike its predecessor the human Sehempfinden lookalike. L * a * b * consists of a dedicated channel brightness L * and the two color a * (red-green axis) and b * (blue-yellow axis). The distances between the primary colors are balanced and can therefore easily calculated. Brightness or color does not influence each other, so L * a * b * color space as a reference for some colorspace conversion from RGB to CMYK, and also in ICC profiles used. In addition, the support many image editing programs, including Adobe Photoshop, in the internal color of CIE L * a * B * back. Losses occur during the conversion in the CIE L * a * b * not to, since it contains all colors of RGB !
and CMYK contains. The only drawback is that no device directly to the color can play. CIE L * a * b * is necessarily device-independent and needs for playback in RGB (monitor) or CMYK (print) will be changed. For the daily work is the L * a * b *- space not as a whole only a few programs with images in L * a * b * can handle? even if their color under the surface in the same color settings.

The professional image-editing program Photoshop, Adobe recommends sRGB for Web / Internet "as well as in the" Universal applications. " For AdobeRGB advises manufacturers on the other hand, only in the press? meant is the professional color printing. Who, like most users, not in the press works from Adobe will allow more or less the sRGB color space as a working reference. But this is not always optimal, because the colors of the few small color can hardly play for corrections and cut many colors, both in print and on the monitor would simply.