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In considering the effect of sensor size, and its effect on the final image, the different magnification required to obtain the same size image for viewing must be accounted for, resulting in an additional scale factor of / where is the relative crop factor, making the overall scale factor / (). Considering the three cases above:
Pixels per inch (or pixels per centimetre) describes the detail of an image file when the print size is known. For example, a 100×100 pixel image printed in a 2 inch square has a resolution of 50 pixels per inch.
A device-independent pixel (also: density-independent pixel, dip, dp) is a unit of length.. A typical use is to allow mobile device software to scale the display of information and user interaction to different screen sizes.
The image sensors in digital cameras contain pixels, each of which measures the amount of incoming light. The pixel format of the image sensor dictates or determines the color depth (often referred to as bit depth), color filter array filtering patterns that are used by the sensor, and the method by which pixel information is stored ( packed ...
Pixel aspect ratio 1:1 Pixel aspect ratio 2:1. A Pixel aspect ratio (often abbreviated PAR) is a mathematical ratio that describes how the width of a pixel in a digital image compared to the height of that pixel. Most digital imaging systems display an image as a grid of tiny, square pixels.
In graphic, web design, and user interfaces, a "pixel" may refer to a fixed length rather than a true pixel on the screen to accommodate different pixel densities. A typical definition, such as in CSS, is that a "physical" pixel is 1 ⁄ 96 inch (0.26 mm). Doing so makes sure a given element will display as the same size no matter what screen ...
Drawing showing the relative sizes of sensors used in most current digital cameras. Advanced Photo System type-C (APS-C) is an image sensor format approximately equivalent in size to the Advanced Photo System film negative in its C ("Classic") format, of 25.1×16.7 mm, an aspect ratio of 3:2 and Ø 30.15 mm field diameter.
Like any resampling operation, changing image size and bit depth are lossy in all cases of downsampling, such as 30-bit to 24-bit or 24-bit to 8-bit palette-based images. While increasing bit depth is usually lossless, increasing image size can introduce aliasing or other undesired artifacts.