CeX3D Inverse - 3D Models from Photographs Automatically


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CeX3D Inverse: DOs and DONTs

The following illustrations and their descriptions help in taking pictures suitable for good 3D reconstruction with CeX3D Inverse.

To avoid blur on the images, the camera must be held still. This is best achieved by placing the camera on a tripod or on a nearby object. Using the camera's timer ensures that the camera does not move by accident. Hand-held images are fine, but it may be difficult to hold the camera still, long enough. Holding the camera against your face and using the view finder helps, but extending your arms typically leads to disaster.

To reconstruct a 3D object or scene, the images must be taken from different view points of the same object or scene. Consecutive images should be such that each image has a large area of overlap with the previous image in what they see. If pictures are taken from the same view point and looking in different directions, they may be useful for panorama stitching, but not 3D reconstruction, since this gives no 3D perspective.

To make 3D reconstruction work well, the angle between consecutive images should not be too large. However, if the camera only moves to a new position without rotating to a new angle, this may also cause problems. Therefore, the angle between consecutive images should ideally by between 5 and 40 degrees. Each point on an object or scene to be reconstructed must be visible in at least two, preferably three or more images.

Hardcore ProcessingModified: 2015-04-12
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