Optical lenses often introduce "barrel" or "pincushion" distortions, making pixels near the edges of the image represent different physical sizes than pixels in the center.
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There is no fixed "pixel value in mm²" — it depends entirely on your image's . Below is a practical guide to understanding and calculating mm² per pixel . pixel value mm2
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In healthcare, MRI, CT, and X-ray scans save data in the DICOM format. These files contain embedded tags that specify exact physical dimensions: Below is a practical guide to understanding and
Understanding Pixel Value to mm2m m squared Conversion: A Guide to Digital Image Measurement
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If your image metadata gives:
