A tight crop makes a detail larger, but it can also remove information about where that detail belongs. Choose the crop around the question being evaluated.
OpenCV's geometric image-processing guidance addresses transformations of image coordinates and regions. OpenCV — geometry.
Name the required context
For an attachment-location review, the accessory alone may not show its relationship to the body. For a surface-detail task, a closer view may be more useful. Those tasks need different inputs.
Keep the original reference
Preserve the full photograph and the crop coordinates. A reviewer should be able to trace a flagged region back to the source image. Do not let a clean cropped example imply that the system has evaluated features it never received.
Source reviewed 25 October 2026. Interpretation and original diagrams: PLUSHIP / Qunhe. Examples are illustrative.
Related reading
Resizing Can Change the Shape a Vision Model Sees
Morphological Cleanup Can Remove a Real Small Feature