Aspect Ratio

Aspect Ratio refers to the ratio between an image’s height and width. In standard definition TV systems it is 4:3. Differing mediums such as television, HDTV, and film, use different aspect ratios. Within computer graphics, it refers to the shape of an individual pixel in a digital image.

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For High Definition TV the aspect ratio is 16:9 which gives a much wider view. This format also allows for much higher defintion images to be displayed.

Most security cameras today are still using a 4:3 format in standard definition cameras. Now with the introduction of megapixel cameras the size of the images can be greatly adjusted because of the vast amount of data a megapixel camera can produce. HD is a type of megapixel camera. All HD cameras are megapixel but not all megapixel cameras are HD. HD video format is 1280 x 720 or 1920 x 1080 for number of pixels. Megapixel cameras can offer many different formats.

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