ADOBE Photoshop Software It is the most comprehensive and popular  photo editor/image editor. It’s primary purpose is to...
Images, Pixels and Resolutions Image is made up of a grid of colored  squares called pixels. Each pixel in a computer im...
Screen Pixels and Image Pixels If you view an image in a zoom ration of  100%, this means that you can see one pixel in  ...
Three primary attributes of aPhotoshop image related to Pixels: File Size (Pixel dimension)– It is a measure of how  many...
Remember that, . . . . Lowering pixel dimensions values can be  dangerous because what you’re really doing is  throwing w...
Ideal and Acceptable SettingsType of Job   Ideal Resolution   Acceptable Setting
Image Formats Images refer to a whole range of picture  elements, including scanned picture and  photographs, icons, illu...
Types of Image Formats JPEG stands for Joint Photographs  Experts Group. It is very popular image  format because it can ...
Types of Image Formats PNG stands for Portable Network  Graphics and is a new format that supports  both 8-bit and 24-bit...
Types of Image Formats GIF stands for Graphics Interchange  Format. It supports 8-bit color and it is a  common image for...
Types of Image Formats BMP is Bit Mapped Picture. It is a  standard Microsoft Windows image format  that uses the extensi...
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Computer graphics adobe photoshop 1

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Computer graphics adobe photoshop 1

  1. 1. ADOBE Photoshop Software It is the most comprehensive and popular photo editor/image editor. It’s primary purpose is to make changes to photographic images that you somehow managed to get on disk, CD graphic collections, internet or other sources.
  2. 2. Images, Pixels and Resolutions Image is made up of a grid of colored squares called pixels. Each pixel in a computer image is perfectly square, arranged on a perfect grid, and colored uniformly. Each pixel is one color and one color only.
  3. 3. Screen Pixels and Image Pixels If you view an image in a zoom ration of 100%, this means that you can see one pixel in your image for every pixel displayed by your monitor. At 200% zoom factor magnifies the image pixels twice their previous size so that one image pixel measures two screen pixels tall and two screen pixels wide. The zoom factor has nothing to do with the size at which your image will print – it affects only how your image looks on screen. If you want to see your image on-screen at its approximate print size, choose Actual Pixels.
  4. 4. Three primary attributes of aPhotoshop image related to Pixels: File Size (Pixel dimension)– It is a measure of how many pixels the image contains. If an image has 256 pixels wide and 384 pixels, the total is 98,304 pixels. Resolution – It refers to the number of pixels that print per inch. Usually an image has a resolution of 180 pixels per inch (ppi). It determines how tightly the pixels are packed when printed Dimension – It is the physical width and height when printed, as measured in inches, centimeters and your unit of choice. You can calculate the dimension by dividing the number of pixels by the resolution. (256 pixels/180 pixels per inch = 1 3/8 inches wide.)
  5. 5. Remember that, . . . . Lowering pixel dimensions values can be dangerous because what you’re really doing is throwing way pixels and deleting pixels means removing details in the image. When you raise the Pixel Dimensions values, Photoshop adds pixels by averaging the preexisting pixels (process called interpolation). Image resulting to softening and never results in the miraculous reconstruction of detail. Ideally, more pixels you have, the greater image detail and more disk space the image consumes.
  6. 6. Ideal and Acceptable SettingsType of Job Ideal Resolution Acceptable Setting
  7. 7. Image Formats Images refer to a whole range of picture elements, including scanned picture and photographs, icons, illustrations, drawings and simple animation. It is also important to consider how quickly or slowly an image can be downloaded form the Internet by the browser. The more pictures, the downloading is slower.
  8. 8. Types of Image Formats JPEG stands for Joint Photographs Experts Group. It is very popular image format because it can support 8-bit or 24- bit color. JPEG files are smaller in size than other image files, because JPEG uses a higher compression ratio. Most image files downloadable from the Internet are in JPEG format
  9. 9. Types of Image Formats PNG stands for Portable Network Graphics and is a new format that supports both 8-bit and 24-bit color. PNG is open standard, which means that anyone is free to use it. The PNG file is recognize by the .png
  10. 10. Types of Image Formats GIF stands for Graphics Interchange Format. It supports 8-bit color and it is a common image format. There are three forms of GIF. (plain GIF, Transparent GIF and Animated GIF) TIFF stands for Tagged Image File Format, which is commonly used to exchange documents between different computer platforms. TIFF has an extension name.tif TIFF supports 1,4,8,24 bits per pixel.
  11. 11. Types of Image Formats BMP is Bit Mapped Picture. It is a standard Microsoft Windows image format that uses the extension name.bmp. It can support 1, 4, 8, 24 bits per pixel. These files are usually created using Microsoft Paint and Paintbrush programs and are used for the wallpaper in Windows. The standard browsers do not currently support this file type.

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