About Adobe Photoshop CS4

I'm currently using Adobe Photoshop CS4 Extended version so I just share some of the information about CS4 to you-all.For more information about others versions, you may refer to the link attached below.

ABOUT PHOTOSHOP

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

Adobe's 2003 "Creative Suite" rebranding led to Adobe Photoshop 8's renaming to Adobe Photoshop CS. Thus, Adobe Photoshop CS5 is the 12th major release of Adobe Photoshop. The CS rebranding also resulted in Adobe offering numerous software packages containing multiple Adobe programs for a reduced price. There are two versions of Photoshop: Basic and Extended, with Extended having extra features available. Adobe Photoshop Extended is included in all of Adobe's Creative Suite offerings except Design Standard, which has the Basic version.

Features

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 fromAdobe 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.

Photoshop uses color models RGB, lab, CMYK, grayscale, binary bitmap, and duotone. Photoshop has the ability to read and write raster and vector image formats such as .EPS,.PNG, .GIF, .JPEG, and Adobe Fireworks.

CS4

Photoshop CS4 features a new 3D engine allowing painting directly on 3D models, wrapping 2D images around 3D shapes, converting gradient maps to 3D objects, adding depth to layers and text, getting print-quality output with the new ray-tracing rendering engine. It supports common 3D formats; the new Adjustment and Mask Panels; Content-aware scaling (seam carving); Fluid Canvas Rotation and File display options. On 30 April, Adobe released Photoshop CS4 Extended, which includes all the same features of Adobe Photoshop CS4 with the addition of capabilities for scientific imaging, 3D, and high end film and video users. The successor to Photoshop CS3,Photoshop CS4 is the first 64-bit Photoshop on consumer computers (only on Windows – the OS X version is still 32-bit only.)

How CS4 different from others version?

Platform	Codename	Release  date	Significant changes

Universal Mac OS X, Windows xp-sp2 (sp3 recommended), Vista,7

Stonehenge

October 15, 2008

Smoother panning and zooming and fluid canvas rotation OpenGL display acceleration in Photoshop Native support for 64-bit on Windows Vista x64 Adjustments panel Auto-blending of images Masks panel Improved Adobe Photoshop Lightroom workflow Content-aware scaling Better raw image processing Extended depth of field Dramatically enhanced color correction Auto-alignment of layers New file display options (tabbed document display and n-up views) New file management and workspaces with Adobe Bridge CS4

[Sources of reference : http://en.wikipedia.org/wiki/Adobe_Photoshop]