Transcription of How to calculate image resolution - SDM Mag
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How to calculate image resolution - SDM Mag
2009 Theia TechnologiesPage1of9 How to calculate image resolutionThe detail in an image is determined by resolution . The shorter the lens focal length, the widerthe field of view. Greater than about 90 most lenses start to show curved, barrel distortedimages that compress the image atthe edges. Rectilinear lenses such as those using TheiaTechnologies Linear Optical Technology don t exhibit barrel distortion and thus maintainimage resolution out to the edge of the definitionsResolution has many definitions; no onedefinition is correct for all situations. I ll list only thedefinitions relevant to the video surveillance industry 1: resolution can be expressed as the number of TV lines or pixels of the imagesensor used to record an image .
At the image sensor resolution is expressed as line pairs per millimeter (lpm) commonly used by lens designers and optical engineers. As the total number of pixels on an image sensor increases, the pixel size gets smaller and requires a higher quality lens to achieve best focus. These high quality lenses, including those manufactured by Theia ...
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