Hands are typically not an issue, because you make sure you don't have your hands in front of the lens when you do this. They simply cover up the tripod area with a round logo image. Some folks don't bother with tripod erasure. If you set the tripod down on a relatively featureless "floor", you may not even need the clean plate shot, and can just use the patch tool to erase the tripod. There are a variety of other techniques, without PTGui, to do the final erasure of the tripod or the blank area left from masking, such as mapping out the cube faces with a tool like Pano2VR or Hugin, or adjusting the pitch -90º to put the "hole-in-the-floor" in the center of the pano where there's the least distortion, and then using Photoshop/Gimp cloning or patch or content-aware fill or masks/layers to erase the tripod. PTGui also lets you specify mask areas before stitching to help eliminate most of the tripod and any potential ghosts/clones (assuming you have enough overlap to provide "clean plate"). The viewpoint correction can take into account the moving of the camera's viewpoint and the tilt downwards to cover the floor. ![]() I use the viewpoint correction tool in PTGui and the "clean plate" shot to cover where the tripod went, as I don't have to leave the stitcher and go into Photoshop to "fix" the nadir. Then, after you've shot everything, you take the camera off the tripod, or move the tripod and tilt it, to get a "clean plate" area where the tripod was, and then use that to patch over the area in the panorama. This allows you to have enough "clean plate" to use masks and layers to erase most of the panohead's vertical arm so that the tripod is in a relatively small circular area of the cube face. Most of the tripod and panohead can be eliminated from the pano by simply shooting two nadir (straight down) shots, taken 180º apart in rotation. Erasing the tripod is a combination of shooting and post-processing techniques. (See: How are virtual tour photos taken?). ![]() Actually, most of the 360x180 panos you see are created by taking multiple images and stitching them together as panoramas.
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