The program is designed for sewing continuous seamless panoramic image of a series of original photographs. Thus, as a rule, are performed sequentially 3 basic steps:
1.converting raw pictures taken normal lens or lens fish-eye, to a form suitable for binding, ie, bring to a cylindrical or spherical projections;
2. proper crosslinking, i.e. odinikovyh combination of elements that are related to the general area of the image, and
3. mixing of adjacent images to equalize their brightness, contrast and color tone.
It is not our aim of describing their methods of working with various programs linking. To do this, there are instructions and guidance. Our task - to become more familiar with the properties and characteristics of such programs on the example of a few of them. emphasize again that if the original pictures are made in compliance with all the conditions, which were discussed in previous articles (kachestvennoy lens, a tripod, level, and t . etc.), virtually any program linking would do well with its task. In practice, however, the implementation of these requirements is not always possible, and in this case, the cross-linking takes on correcting errors in panoramas caused by assumptions in the selection of equipment and shooting deviations from the ideal scenario.
Therefore, the program is characterized by cross-linking is not the way it handles the 'perfect' shots, and how she copes with all kinds of errors on the images ('barrel', vignetting, slopes, uneven exposure, color, etc.)The first modern program designed for stitching panoramas from individual photos should be considered QuickTime VR Authoring Studio, released in 1997, the corporation Apple Computers. Since then, the number of programs stitching panoramas on the market, exceeded three decades.
Most of such programs has their algorithms based automatic stitching, which are based on detection of contrast of picture elements on the original images. Some of the programs carried out stitching on the markers that will put the user in the adjacent images, followed by a combination of marked points on the resulting panorama (PanaVue Image Assembler) . Usually before starting work on cross-linking is necessary to specify the focal length of the lens, with which the survey was conducted.This can be done either by directly entering a numerical value or choose the type of camera with the lens of the available in the program simple database.
Several programs can independently carry out refinement of these focal lengths (Panorama Factory ,PixMaker Pro) . There are programs that allow stitching panoramas presented several rows of the original pictures (still the same (PanaVue Image Assembler , REALVIZ Stitcher, etc.). Virtually all of the programs allow you to specify the type of future panorama - a flat or circular. Most programs will generate not only the resulting stitched panoramic image but also HTML-code which is suitable for direct placement on the page and allows you to play a single panorama using immediately placed the program-viewer (usually Java-applet), or access the matching plug-in (plug-in) browser.
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