Photoshop

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Eng. Soraya Elsayed Ahmed


Photoshop • Photoshop is a graphic editing program developed and published by Adobe Systems. • Adobe products : – Photoshop, Illustrator, and InDesign. – After Effects And Priemere – Dreamwaver – Flash Builder


Photoshop History •1987 •1990 •2002 •2003 •2005 •2007 •2008 •2010

Thomas Knoll Adobe Adobe Adobe Adobe Adobe Adobe Adobe

Display Photoshop 1 Photoshop 7 Cs (8) Cs2(9) Cs3(10) Cs4(11) Cs5(12)

Grayscale images


• Computer graphics can be classified into two distinct categories: raster graphics and vector graphics. It is simple to convert from vector graphics to raster graphics, but going the other way is harder.


Two Kinds of Computer Graphics Raster

Vector

Composed of pixels

Composed of paths

Become pointy as it is scaled up

Remains smooth at any size

partially overcome with the use of "antialiasing Require higher resolutions


much brighter

Two Kinds of Color RGB

CMYK

Use light to display color

Use printing inks.

Use RGB For Screen Displays

CMYK For Print

Display color as a result of light being transmitted (added)

Display color as a result of light being absorbed (subtracted) by the printing inks. As more ink is added, less light is reflected.

The total absence of light would be perceived as black.

The total absence of ink the resulting light being reflected (from a white surface) would be perceived as white.

Computers generally display RGB using 24-bit color.

colors are represented as percentages

Therefore there are 16,777,216 possible colors (256 reds x 256 greens x 256 blues) in the 24-bit RGB color model.

Once an image has been converted from RGB to CMYK and brought into printable gamut, the extra RGB data will be lost.



List of Raster graphics editors

List of vector graphics editors

Adobe Photoshop

Adobe Illustrator

Microsoft Paint

Adobe Fireworks (Macromedia Fireworks)

Corel Paint Shop Pro

Adobe Flash (Macromedia Flash)

Corel Photo-Paint

Adobe FreeHand (Macromedia FreeHand) CorelDraw


Color Depth • Color "depth" is defined by the number of bits per pixel that can be displayed on a computer screen. Data is stored in bits. Each bit represents two colors because it has a value of 0 or 1. The more bits per pixel, the more colors that can be displayed. Examples of color depth are shown in the following table: • Color Depth No. of Colors 1 bit color 2 4 bit color 16 8 bit color 256 24 bit color 16,777,216


File Extensions •

JPEG - Joint Photographic Experts Group - Used for photographic (continuous tone) images. Unlike GIF files the JPEG format can take advantage of the full spectrum of colors available to your monitor. The JPEG format also uses compression for smaller files and faster downloads. However, unlike the compression method used in GIF files, the JPEG compression is "lossy" which means it discards data in the process. Once a file is saved in JPEG format the data is permanently lost. If you want all the image data available for future use, save the image using no compression or "lossless" compression and make JPEG copies from it. GIF - Graphics Interchange Format - Images using a fixed color palette (limited to only 256 colors - not the full spectrum of colors available to your monitor). The GIF format uses compression for smaller files and faster downloads. This format is best for images with solid colors or areas of uniform color such as illustrations and logos. TIFF - Tagged-Image File Format - Used for bitmaps only. The TIFF format is supported by virtually all graphics applications. EPS - Encapsulated PostScript® - A file format used for both vector graphics and bitmaps.


list of some of the things Photoshop CS is capable of:


Painting with different colors


Straightening Your Images


Blurring


Replacing colors


Darkening Images


Adding colors to Black & white images


Smudge


Remove blemish, marks, spots & blotch


Changing eye color


Changing Hair Color


Whitening Teeth


Whitening Eyes


Removing Red Eyes


Removing Wrinkles


Sharpen images.


Fix images with poor color or lighting conditions


Repair old photographs


Removing Background Items From Photos


Adding text


Removing People From Photos



Editing Images


Removing undesired things


Convert Images to Grayscale


Reveal parts of an image hidden in shadow.


Adjust Hue And Saturation


Making edits on the perspective planes


Applying Filters to images


Using Layer Styles


Make patterns


Blending Photos


Create Logos for comanies


Bussiness Cards


Web Page Design


Animation


3D images


Workspace switcher Application Bar Control Panel Tabbed Document window

Tools Panel

Adjustment panel

Collapse to icon button


Turn static files into dynamic content formats.

Create a flipbook
Issuu converts static files into: digital portfolios, online yearbooks, online catalogs, digital photo albums and more. Sign up and create your flipbook.