If you want to play along, there’s an accompanying download containing all the images together with a project file saved at the point when the optimization of all the ptgui pro apart from the hand held nadir has been completed. Download from: Apart from the project file ptgvpt. Another shooting possibility is to tilt the horizontal row down by 10 degrees to reduce the size of the ptgui pro hole and dispense with the two down shots at right angles. In order that the blending will work properly, ptgui pro is necessary to apply masks to the three down shots.
Interface and preferences in PTGui
If you want to play along, there’s an accompanying download containing all the images together with a project file saved at the point when the optimization of all the images apart from the hand held nadir has been completed.
Download from: Apart from the project file ptgvpt. Another shooting possibility is to tilt the horizontal row down by 10 degrees to reduce the size of the nadir hole and dispense with the two down shots at right angles. In order that the blending will work properly, it is necessary to apply masks to the three down shots.
The masks have been added on the Mask tab of the supplied project files The masks look like this: Note that in the case of the handheld nadir on the right that will be used with the viewpoint option, it is necessary to mask anything that is not part of the flat plane of the paved area as these parts are likely to be badly affected by parallax effects after the viewpoint transformation.
Alternatively, if using the PTGui blender, you can adjust the blend priority of the nadir image via the Image Parameters tab to restrict the blending to a circular area in the middle of the frame, thereby excluding the outer parts of the image. If using an earlier version of PTGui Pro without the mask feature, masks can be applied to the input images as alpha channel masks using Photoshop, in which case the files must be saved as tiff, as jpeg files don’t support alpha channel masks.
The supplied project file would then need editing in a text editor to change the. An alpha channel mask tutorial can be found on my web site. Select Advanced mode on the Project Assistant tab and select the Optimizer tab. Use the Advanced mode there also: Click on the Run Optimizer button to confirm the current optimization state: Now select the numerical transform option the button to bring the nadir to centre stage: The Panorama Editor display equirectangular projection, x will look like this: Note that this transformation is optional, being mainly used for historical reasons in order to work around a problem with versions of PTGui Pro up to V7.
Viewpoint optimization then worked more reliably with the nadir at the centre of the output area. This is not strictly necessary in Version 9, but it still helps in giving a better view of the nadir area so you can see more clearly what’s going on there. Select the Mask tab and add a mask to the newly added image 9, similar to the one below. Select the Control points tab and add five points between images 7 and 9, like this: Five points should be enough, but you may add more.
Prefer to assign points on tiny spots for best accuracy. Like this: Click on the run button to optimize the nadir roughly into the right position. A poor result will be reported because it wasn’t taken on the pano head with the others: This is to be expected and is nothing to worry about, unless the maximum distance is really huge, in which case check the control points and maybe drag the nadir into approximately the right position manually.
Otherwise, just click OK.. With any luck, a good result is now reported! Occasionally, the image might not snap into good alignment at the first attempt. If that should happen, try selecting the nadir image on the Panorama Editor window click the “Edit individual images” icon , adjust the image position by dragging and also rotating right button held down , and then try another optimization.
This may sometimes need to be repeated a few times before things click into place, but I have so far never failed to get a good alignment eventually. Blending here with Smartblend on a Windows system gives an good result, with no visible joins in the nadir area. Use the “Feather: Sharp” setting with the PTGui blender. Even with viewpoint correction, there might still be some very minor stitching errors for pixel peepers to find. Adjustment of the vp nadir mask to alter the seam position may then help.
In difficult cases, I generate two full equirectangular images: You can then extract rectilinear views of the nadir area from each panorama image for merging in Photoshop, using whatever nadir patching workflow you are comfortable with.
PTGui is image stitching software for stitching photographs into a seamless. Purchase a PTGui license for: Personal use or single person businesses. A.
VIDEO: Ptgui Pro
PTGui comes in two versions: PTGui and PTGui Pro. The main difference. Tutorials. Video Tutorials If you are new to PTGui, be sure to watch our video.