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Pixel Purfect

Re-touching The World, One Image At A Time

A pixel (short for picture element, using the common abbreviation "pix" for "picture") is a single point in a graphic image. Each such information element is not really a dot, nor a square, but an abstract sample. With care, pixels in an image can be reproduced at any size without the appearance of visible dots or squares; but in many contexts, they are reproduced as dots or squares and can be visibly distinct when not fine enough. The intensity of each pixel is variable; in color systems, each pixel has typically three or four dimensions of variability such as red, green, and blue, or cyan, magenta, yellow, and black.

The art of retouching involves manipulating attributes of individual pixels in a manner that is both professionally acceptable and visually pleasing while maintaining a believability that the subconscious mind will accept.


Where everyone learns Photoshop - National Association of Photoshop Professionals