Photo on the other hand uses RGB cameras primarily and works in the RGB color space, so RGB makes more sense as a final output color space and thus the printers follow suit. This is to say nothing of inkjet and pigment systems that use numerous (mine uses 12) colors in order to fill out the color space even more evenly.
If there is a chance that an image will be reproduced in various CMYK-spaces (say, printed as a poster on a sheet fed press but also in magazines or newspapers) it might be beneficial to maintain the RGB-file and color correct there (with the proper View – Proof Setup/s), then separate from that file according to the various requirements.
Here’s how you can convert pictures from RGB to CMYK in Photoshop: Step 1: Launch the Adobe Photoshop app and open your artwork. Step 2: Navigate to the Edit menu and select Convert to Profile. Step 3: Under Destination Space, choose Working CMYK from the Profile list and hit OK.
These color values are converted to an RGB value. This results in the color value in RGB notation with rgb (255, 0, 0, 1). There is always a loss of color accuracy to be expected when converting from CMYK to another color format. Since CMYK calculates without transparency value, it is not possible to calculate an RGBA color with transparency
When converting an RGB image to CMYK, correction is done for colors outside the CMYK color gamut, hence, when converting the image many times, there is a possibility that it changes the original color to a different color. Conversion from RGB to CMYK should be done as little as possible, for the less it is done, the smaller is the possibility
How to convert RGB to CMYK. The max number of R, G, B values are 255, first of all, we divided them by 255 to become the number of 0~1, this ratio will be used in the calculation. Rc = R ÷ 255. Gc = G ÷ 255. Bc = B ÷ 255.
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convert cmyk to rgb without losing color
