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VGA Imagers in Camera Phones

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Despite a drive for higher resolution, the old standard is sticking around.

Giles Humpston, Tessera

Early cell phones had very low resolution imagers, typically 0.1 megapixels. This resulted in barely acceptable picture quality. Consequently, the imager resolution moved quickly from the common intermediate format to video graphics array (VGA), which provides three times the number of pixels and a noticeable improvement in picture quality compared with common intermediate format (Table 1). Table 1. The standard format and resolution of solid-state imagers run from QCIF, with just 25,344 pixels, up to UXGA, with 2 megapixels. Courtesy of the Video Electronics Standards...Read full article

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    Published: March 2008
    Glossary
    pixel
    A pixel, short for "picture element," is the smallest controllable element of a digital image or display. It is a fundamental unit that represents a single point in a raster image, which is a grid of pixels arranged in rows and columns. Each pixel contains information about the color and brightness of a specific point in the image. Some points about pixels include: Color and intensity: In a colored image, each pixel typically consists of three color channels: red, green, and blue (RGB). The...
    cell phonesConsumerFeaturesindustrialpixelresolution imagersSensors & Detectors

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