in the next image we can see the cut out of the final Stitch, where the subject proportions seem to be correctly reproduced From here it’s already possible to note the validity of calculations, because the image seem to be substantially correct. the reconstruction of the correct image as it appears in the “Panorama Editor” window. the cut out of the interested zone on the original image In the above images, we have summarized the complete procedure to correct the image perspective. The “a” and “c” values are usually zero, so I haven’t optimized them.Ĭoncerning the “Field of View” of the lens, I preferred to maintain the previously set up value (unchecked option-box), as I do for “Shift” values (theoretically equal to zero) In this example, I checked only “b” parameter, that specifies the barrel/pincushion distortion value of used lens (Nikon AI-P 45mm f/2.8), actually unknown. The principle is always the same: we will not optimize the parameters we exactly know, but we will find automatically with PTGui those unknown and uncertain, checking the corresponding option-box. In the list “ lens parameters ”, instead, we have to specify which lens parameters need to be optimized. In our example, we checked “Image 0” that is the unique image in the project. Usually, all control points included in the project are utilized, so we check all option-boxes.
In the list “ use control points of ” we have to specify which control points use. In fact, the default value of all parameters is zero. For example, if I was sure to have put the camera aligned to the XY planes (with a spirit level), I wouldn’t optimized the relative parameters but I would have maintained Roll=0 and Pitch=0. In the Optimizer advanced mode, it’s possible to select individually which parameters optimize automatically and which that haven’t to be optimized, maintaining in this manner the assigned value for default.Ĭoncerning the camera pointing parameters (Yaw, Pitch, Roll), I decided to optimize all of them, because during the shoot the camera was rotated on all the three axis (in particular it was pointed to the up/left and lightly rotated). Passiamo adesso al pannello "Optimizer", che stavolta dovremo utilizzare con l' interfaccia avanzata : Nel pannello "Panorama settings" si deve solamente impostare la proiezione rettilineare (Rectilinear -flat). Now we go to the advanced interface of the “Optimizer” panel : In the panel “Panorama settings” we have only to set the rectilinear projection (Rectilinear -flat). Poor or not well distribuited control points will lead in higher calculation errors. To obtain an exact calculation, we have to enter more horizontal and vertical lines covering all the image. The same thing is for CP2, 5 and 6 (horizontal) and for CP3 and 4 (vertical). CP1, for example, defines an horizontal line which ends are indicated in the two windows.
#Ptgui always on tip windows
The front side of S.Miniato a Monte church helps a lot us in this operation, thanks to the abundance of ortogonal references.Īs you can see, PTGui opens two windows (also if the image is one) and the reference points are entered one for each image. The entered control points don’t define - as previously told - the correspondence points between images, but straight lines that actually are placed vertically or horizontally.
#Ptgui always on tip upgrade
In this new version there are also some code optimizations, so that we advice the upgrade also to people who are not interested on above mentioned news. EXIF data are read also by TIFF files (in addition to JPGs), that is a very useful function for people who shoot in RAW format and subsequently converts in TIFF format: in this way, the focal length of utilized lens and the sensor size are imported automatically. on Tools/Options/Directories&Files we can configure until 5 drives/folders at the same time for temporary files, to greatly expand the storage space
support for PSB Photoshop output format, which permits to realize very large dimensions images, until 300.000x300.000 pixel, exceeding the previous barrier of 4G byte as maximum dimension for an image Added some notes about compatibility with PTgui 7.īefore starting, we would like to present some news included in the last release of PTGui, the 5.7 issued on March 2006: In this article I analyze some of the PTgui's advanced functions: t1 and t2 control points, the Optimizer advanced mode and finally the panorama creation with the various “Layers “ output options.
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