Adobe Photoshop Tutorials – Color Space
This is another good video of photoshop showing you the color spaces in Photoshop. This video is going to teach you about the color spaces used in Photoshop and how to create fabulous art using these color spaces. While you are with color spaces, enjoy the video as well, here it is.
The term color spaces is interchangeable with the term color mode. Its simply states the color value method you are using to work with your images from RGB, CMYK, grey scale and alike. Bit depth is a measure of how much color information is content within each pixel of an image. 1 bit simply means on of off, black or white. 8 bit for color is two hundred and fifty six values of prism; 8 bit for grey scale is two hundred and fifty six of grey from light grey and all way to dark grey. We ready to grasp the whole bit thing, to remember how video game systems are rated in term of graphic capability?
Remember the old Nintendo entertainment system? That system was an 8 bit system, which is for Mario and Wolf series, looks like a jaggy boxes. Then we jumped to super 16 bit ever with the release of super Nintendo second genesis. All are certainly will be seeing more color, and more pixels. These days, video games systems are able to display so many pixels we are talking about, HD or High Definition games now, with the X-Box 360 and Playstation 3. No more little boxy guys with boxy heads, and boxy swords.
The same kind of thing applies to today’s imaging software, pixels are no longer issue. Now you can work in 32 bit mode camera and who know what’s coming down next. So one on earth do these crazy acronyms, such as RGB and CMYK for any way. Lets talk about, RGB stands for Red, Green, and Blue. These are the color displayed by your computer, and your TV. It is the combination of these three colors that provide you all the colors you see while watching movies online or a movie on your TV. Three measly colors, to get 16.7 million, trust me. I wasn’t the one who did muff on this one. When we go to my panel’s palette, I will show you. If I click on channel, you see that I have, seems like hue mode right now. What I am gonna do, is click on image, mode and I am gonna switches to RGB mode.
What we are looking at here, is our the first channel which shows three color mixed together, give us this color image. I can click on the red to see the red pixels in this image, the green pixels in an image, and the blue pixels in the image. And once again when these three are mixed we come up with RGB. Alright, lets go ahead and talk about how RGB space works.
RGB, uses, what is known a additive colors, where the tree primary colors red, green, and blue, are added together in various combinations just to give you colors on your screen. The primary use of RGB colors space is when you playing to have your graphics, games, films, website, and someone viewed only on a computer, or TV screen. RGB is not what most professional used to take a document to press. That is what our next module comes in.
CMYK stands for the four colors of in used by the printers. They are cyan, magenta, yellow, and black. The ‘K’, because ‘B’ was already spoken for in the RGB color space. In RGB, told me, it wasn’t sharing B with CMYK. Anyways, CMYK is what designers used to sends documents to professional printer’s from magazine, poster, and alike. It is the CMYK model that give the term four color printing its meaning. Once I will go back to my channels. And I will go to my Image, mode and I will go ahead, change it back to CMYK. And now we see we have four different channels here, Cyan, magenta, yellow, and black. Now the cyan is a kind of bluish. Magenta is a kind of red purplish. Yellow of course and black. And all these are mixed together to give us the our CMYK for four color printing. Quite the opposite of RGB, the CMYK model is subtractive, meaning mixing colors leads to darker colors, heading towards black, and subtracting the least colors, leading towards, black.
Now the grey scale lacks actual colors in the prism. But instead, represents 256 values of grey. Grey scale, is great to use when going for that classic vintage look or mixing part of color image with grey for emphasis on a part of an image. Lets go ahead and convert this image to grey scale. I will move this over. Image, mode, grey scale. In normal you get a warning says, hey dude want to discard this color information, are you absolutely sure or you can go ahead and say ‘Don’t show me this’, ever in your life. So I am going ahead and click ok. And we have grey scale image. Once again, it will be really nice to have, may be hemi or may be the water info color and then have rest of this, in grey to emphasis something, for ad.
As you so on, converting images from one color space from another is achieved through the image menu. I can take any image and convert it quite easily through the menu here, to go from grey scale to an index, and so on. and each one of these mode has good use. Index is usually used for web graphics, RGB as a regular screen, CMYK for printing, Lab color is the mode that, Photoshop automatically goes to when you are converting from one color mode to another. So I really don’t use this too much. We also have bitmap, which is black and white. All away black and white. Lets go ahead and see how it looks like.
I will go ahead and leave the resolution, at 72, and click ok. And now we have On or Off. There are no tones of gradient at all. Its either black or white. And its just nice, as I get this nice vintage look, or some kind of special effects. One thing I want to mention before ending this lesson, is sometimes when you are in CMYK mode, a lot of special effects filters dont appear that because the lot of the filters works with RGB. So that alarms you switch to use RGB, as you filters special effects, and then go back CMYK if you wanna to press.