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IT Help Desk => Programming Language => Software Developers Forum => Topic started by: Yousuf.Chy on September 14, 2010, 06:05:23 PM

Title: Adobe Photoshop
Post by: Yousuf.Chy on September 14, 2010, 06:05:23 PM
Adobe Photoshop is helping people to edit images personally and also professionally since 1988. It has fifteen different versions and latest version is CS5, CS5 Extended (12.0).

Adobe Photoshop is a graphics editing program developed and published by Adobe Systems.

Early history

In 1987, Thomas Knoll, a PhD student at the University of Michigan, began writing a program on his Macintosh Plus to display grayscale images on a monochrome display. This program, called Display, caught the attention of his brother John Knoll, an Industrial Light & Magic employee, who recommended Thomas turn it into a fully-fledged image editing program. Thomas took a six month break from his studies in 1988 to collaborate with his brother on the program, which had been renamed ImagePro. Later that year, Thomas renamed his program Photoshop and worked out a short-term deal with scanner manufacturer Barneyscan to distribute copies of the program with a slide scanner; a "total of about 200 copies of Photoshop were shipped" this way.

During this time, John traveled to Silicon Valley and gave a demonstration of the program to engineers at Apple and Russell Brown, art director at Adobe. Both showings were successful, and Adobe decided to purchase the license to distribute in September 1988. While John worked on plug-ins in California, Thomas remained in Ann Arbor writing program code. Photoshop 1.0 was released in 1990 for Macintosh exclusively.


Photoshop has ties with other Adobe software for media editing, animation, and authoring. The .PSD (Photoshop Document), Photoshop's native format, stores an image with support for most imaging options available in Photoshop. These include layers with masks, color spaces, ICC profiles, transparency, text, alpha channels and spot colors, clipping paths, and duotone settings. This is in contrast to many other file formats (e.g. .EPS or .GIF) that restrict content to provide streamlined, predictable functionality.

Photoshop's popularity means that the .PSD format is widely used, and it is supported to some extent by most competing software. The .PSD file format can be exported to and from Adobe Illustrator, Adobe Premiere Pro, and After Effects, to make professional standard DVDs and provide non-linear editing and special effects services, such as backgrounds, textures, and so on, for television, film, and the Web. Photoshop is a pixel-based image editor, unlike programs such as Macromedia FreeHand (now defunct), Adobe Illustrator, Inkscape or CorelDraw, which are vector-based image editors.

Title: Re: Adobe Photoshop
Post by: Yousuf.Chy on October 04, 2011, 02:45:11 PM
The Use of Clone Stamp Tool

The clone stamp tool takes a sample of an image, which you can then apply over another image or part of the same image. Each stroke of the tool paints on more of the sample.

Example of altering an image with the cloning tool
To use the clone stamp tool:

1. Select the clone stamp tool , and do the following in the options bar:

i. Choose a brush and set brush options. (See Working with brushes.)
ii. Specify a blending mode, opacity, and flow. (See Setting options for painting and  editing tools.)
iii. Determine how you want to align the sampled pixels. If you select Aligned, you can release the mouse button without losing the current sampling  .    As a result, the sampled pixels are applied continuously, no matter how many times you stop and resume painting. If you deselect Aligned, the sampled pixels are applied from the initial sampling point each time you stop and resume painting.
iv. Select Use All Layers to sample data from all visible layers; deselect Use All Layers to sample only from the active layer.

2. Set the sampling point by positioning the pointer in any open image and Alt-clicking (Windows) or Option-clicking (Mac OS).
Note: If you are sampling from one image and applying to another, both images must be in the same color mode.

3. Drag in the image.


Photoshop Help
Title: Re: Adobe Photoshop
Post by: Yousuf.Chy on October 09, 2011, 07:03:47 PM
Using the Rectangular Marquee tool

The Rectangular Marquee tool does exactly what its name implies. It selects an area of the photo by drawing a rectangular marquee. To select a perfect square, you can hold down the Shift key as you draw the selection area.

    In the toolbox, click and hold the Elliptical Marquee tool, and from the menu, select the Rectangular Marquee tool.
    Drag to draw a rectangle over any portion of the photo.
    Press Ctrl+D to deselect.
    Hold down Shift key, draw another selection. Holding down Shift draws a perfect square, as shown in Figure 2.

    Rectangular Marquee selection


    Figure:  Rectangular Marquee selection

Source: http://www.adobe.com/designcenter/photoshopelements/articles/lrvid2322_pse.html
Title: Re: Adobe Photoshop
Post by: Yousuf.Chy on October 09, 2011, 07:11:39 PM
Using the toolbox

The first time you start the application, the toolbox appears on the left side of the screen. Some tools in the toolbox have options that appear in the context-sensitive tool options bar. These include the tools that let you use type, select, paint, draw, sample, edit, move, annotate, and view images. Other tools in the toolbox allow you to change foreground/background colors, go to Adobe Online, work in different modes, and jump between Photoshop and ImageReady applications.

For more information on the foreground and background color controls, see Choosing foreground and background colors.

Using the tool options bar

Most tools have options that are displayed in the tool options bar. The options bar is context sensitive and changes as different tools are selected. Some settings in the options bar are common to several tools (such as painting modes and opacity), and some are specific to one tool (such as the Auto Erase setting for the pencil tool).

You can move the options bar anywhere in the work area, and dock it at the top or bottom of the screen.

To display the tool options bar:

Do one of the following:

Choose Window > Options.
Click a tool in the toolbox.


Lasso options bar

To return a tool or all tools to the default settings:

Do one of the following:

Click the tool icon on the options bar, then choose Reset Tool or Reset All Tools from the context menu.
(ImageReady) In Windows or Mac OS 9.x, choose Edit > Preferences > General, then click Reset All Tools.
(ImageReady) In Mac OS X, choose ImageReady > Preferences > General, then click Reset All Tools.
To move the options bar:

Drag the options bar by the gripper bar at its left edge.

Choosing foreground and background colors

Photoshop uses the foreground color to paint, fill, and stroke selections and the background color to make gradient fills and fill in the erased areas of an image. The foreground and background colors are also used by some special effects filters.

You can designate a new foreground or background color using the eyedropper tool, the Color palette, the Swatches palette, or the Adobe Color Picker.

The default foreground color is black, and the default background color is white. (In an alpha channel, the default foreground is white, and the background is black.)

Source: Photoshop Help