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Adobe Photoshop - Basic Terms

Adobe Photoshop - Basic Terms. 1.01. Pixel. A pixel is a single dot of color information in a digital picture. Anything you see on your computer is comprised of millions of these dots, packed so closely you can’t tell them apart.

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Adobe Photoshop - Basic Terms

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  1. Adobe Photoshop - Basic Terms 1.01

  2. Pixel • A pixel is a single dot of color information in a digital picture. • Anything you see on your computer is comprised of millions of these dots, packed so closely you can’t tell them apart. • However, through the magic of Photoshop, I can show you an example.

  3. This appears to be a regular picture of Chris Bosh looking weird. But if I zoom in on his eye…

  4. It’s really nothing more than a collection of dots and colors That come together to form his eye!

  5. Raster • Adobe Photoshop is a raster-based program. • Something defined as “raster based” means that the picture is comprised of a grid of pixels. Each pixel in the image has a color value and all together, the pixels show the image. • Attempts to enlarge images in a raster based program means that the original pixels will increase in either size or number. A low quality picture will show its poor quality when these pixels are enlarged, as the data is being spread over a larger area and is, as a result, easier to see.

  6. Resolution • Resolution is the total number of rows and columns of pixels in an image. • An example of image resolution is “1024x768” • This means the image is 1024 pixels wide by 768 pixels tall. • The same term is used for computer monitors. • Resolution is also called: • Dots per inch (DPI) • Pixels per inch (PPI) • These two terms are used like shorthand to assess an image’s quality. • For instance, 72dpi is low resolution because only 72 pixels fit in an inch. • 300dpi is good resolution because there are more pixels (300) per inch than the 72dpi example. • With more pixels per inch, you can be certain that an image will enlarge better without looking crappy.

  7. Color Modes • Photoshop can handle files in multiple different colors, depending on your needs. • RGB – Stands for Red, Green Blue • RGB are the three channels of visible light that we can see. • All digital devices (Phones, tablets, computers, TVs) show you color in mixtures of Red, Green, and Blue. • Values of color in RGB go from 0 (black) to 255 (white)

  8. Color modes continued • CMYK is the color mode used for print. • Cyan, Magenta, Yellow, Black • In printing, CMYK mixes the four colors from above to make a color a printer can produce. • CMYK should only be used in design when the product is intended to be printed. • Colors are duller, the expectation is to be printed on white paper and enhanced by the brightness of the sheet. • RGB is designed to have vibrant colors for digital displays like smartphones, tablets, and monitors, alternatively.

  9. Layers • Photoshop works in a concept called “layers” • (This works pretty much exactly like you expect) • You can place images on their own layers, and depending on the position of the layer in the stack, you can see through one image to the other below. • When you start erasing from one picture to reveal the one underneath, you can do some pretty interesting things…

  10. We’ll just put a picture of this what’s-her-name here on the first layer…

  11. Add a picture of the… interesting-looking Ron Howard on top of her…

  12. And with a just a few minor erases, we’ve made something that will haunt our dreams.

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