A common step between 2 and 12 megapixels
Five megapixels, typically about 2448 by 2048 pixels, is a widely used resolution for inspection and measurement: enough pixels for small features over a moderate field, on sensor formats that standard C-mount lenses cover. Cameras in this class differ in shutter type, sensor format and frame rate.
- Divide the field of view by the pixel count to get the size of one pixel on the object, and allow several pixels across the smallest feature.
- Choose a global shutter for moving parts; a rolling shutter suits stationary scenes.
- Match the lens to the sensor format and pixel size of the model, and the interface to the frame rate and cable length you need.
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