The pixel is the smallest and most minute unit of a digital image and is present in an immeasurable number to form a complete image. Each pixel is a homogeneous unit of color that, in sum and with a significant color variation, results in a more or less complex image. They can have three or four color elements to choose from: red, green and blue or magenta, yellow and cyan.
The pixels of an image are easily observable when you proceed to zoom in on it, since this allows you to observe in greater detail the pixels that have been used to compose the image. All pixels are square or rectangular and can be colored, white, black or gray in different shades. The possible color combinations are endless and have become highly developed compared to early digital images that lacked smoothness and reality.
There are two different systems of using colors. The bitmap is the more primitive of the two since it admits only a maximum variation of 256 colors, each pixel having one byte. On the other hand, images that have true color use three bytes per pixel and this triples the result of possible variations, exceeding 16 million color options and consequently giving the image greater reality.
The history of the pixel goes back to the beginning of the 30’s when the concept began to be used for the cinema. The term pixel referred to an image element or “picture element”. It is also understood by many as the smallest cell that makes up the complex system that can become a digital image. This idea was coined in the 70s and also applied to television before computers.
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