Adobe Photoshop

Adobe Photoshop is probably the most widely known and commonly used graphics software in the world. In fact it is now so widely known that that the term Photoshop is used as a s verb to describe the act of altering a digital image. Photoshop is fundamentally a pixel editing program. While it has a number of vector editing tools fully featured vector editing is better done with a program such as Adobe Illustrator. By editing the RGB values and position of individual pixels and image can be retouched or altered in a large variety of ways.

See the Adobe Photoshop and Photoshop Techniques categories for more articles.

This video pushes Photoshop further in to the collective consciousness of the general public. Enjoy!
http://www.collegehumor.com/moogaloop/moogaloop.swf?clip_id=1944668&fullscreen=1

Pixel-based images

Pixel-based images, also referred to as Raster graphics or Bitmaps a made up of small squares or dots known as pixels. A pixel (pixel-element) is the smallest editable element in a pixel-based image. A pixel-based image may be stored as a number of file formats such as a jpeg, png, gif, tiff or psd. Unlike Vector based imagery, pixel-based imagery is resolution dependent and can not be scaled up without loosing quality. Resolution is typically measured by the number of pixels per inch (ppi). The higher the number of pixels per inch the higher the image quality will be and the larger the file size will become. Each pixel in an image has a position on the document and an RGB value. By altering the RGB values and positions of various pixels in an image using a pixel editing program such as Adobe Photoshop, we can retouch and alter an image in a vast variety of ways. All digital photographs are pixel-based as are the majority of of images within a web page.

This video takes an imaginary journey into the land of the pixel:

http://www.dailymotion.com/swf/video/xcv6dv
PIXELS by PATRICK JEAN.
Uploaded by onemoreprod. – Watch original web videos.