Full body/head scanning capture tips
Modified on: Wed, 3 Jun, 2020 at 6:26 PM
- For full body capturing scenarioo we advice to use some kind of camera rig (or several camera that will take images simultaneously to reduce as much is possible person moving), main problem usually caused by low effective resolution, person movements (that cause additional noise in point cloud and false alignment).
- Each photo should effectively use the frame size: object of interest should take up the maximum area. In some cases portait camera orientation should be used.
- Good lighting is required to achieve better quality of the results, yet blinks should be avoided. It is recommended to remove sources of light from camera fields of view.
- Pay attention to the depth of field - as sharp as possible throughout the depth of the subject.
- Preferably shoot using a fixed lens with focal length. For multi - camera rigs (studios) try to use minimal number of different camera and lens models.
- The object should contrast against the background; blinks from the background on the object surface should be avoided. Starting from 0.9 version Metashape (PhotoScan) has Mask by background feature, that allows automasking for fized cameras, providing that "empty" shots for every camera are taken without the present of the object of interest. The background should be kept unchanged during object shooting.
- For single camera scanning scenario during shooting, move the camera along the spiral or circular tracks, providing the necessary overlap and paying special attention to the blind spots (hands, ears, nose, clothing details).
- For single camera scanning scenario it is recommended to take a comfortable position in which a person can stay for a long time in a stationary position.
- Hair is difficult for reconstruction, using well textured hat (for example, knitting) is recommended. If a scanned person has lush curly hair, it is recommended to remove them in a tail or put under headdress.
- It is highly recommended to avoid light-absorbing (black), monotonous (without texture/pattern), reflective clothing. Materials with distinguishable and irregular patterns are preferred, e.g. knitting, jeans and etc.
- Remove the glasses if the scanned person wears them.
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