Hugin panorama4/16/2023 ![]() ![]() Screenshot showing the selection of a conspicuous triplet of stars as a control point in two different images featuring the same part of the sky. Once satisfied, proceed to the next pair of images by clicking on the arrow button (“next image pair”) in between the two drop-down lists. It is important to include some control points near the edge of the image, where lens distortions are usually largest. Make sure that you select at least ten control points, covering as much of the image as possible. Once the control point has been correctly identified by Hugin, proceed in the same manner by selecting another suitable control point. If not, simply use the “undo” function in the menu and try again. Hugin should now automatically identify and mark the same control point in the right-hand image as well. Then click on the same structure in the right-hand image. Hugin will then zoom in on that region and allow you to adjust the position of the box marking the control point, if necessary. In other words, any object with bright, compact, and unique structures will usually be suitable.Ĭhoose your first structure, preferably one near the centre of the image (or the overlap region between the two images), and click on it in the left-hand image. Useful structures typically include isolated, bright stars, close pairs or triplets of equally bright stars, compact star clusters, bright gas nebulae, etc. In order to identify control points common to both images you will need to identify suitable and conspicuous structures that the algorithm can easily identify in both images. Then select the first image from the drop-down list on the left-hand side and the second image from the list on the right-hand side. To begin the process, navigate to the “Control Points” tab. This is the most time-consuming part of the entire process and can take more than an hour if a larger number of images (> 20) needs to be stacked. ![]() Therefore, control points will have to be set manually in every single image. When dealing with astrophotos, however, the automatic control point algorithm will usually fail, because there are too many stars in the image that all look the same and will confuse the algorithm. When stitching a terrestrial panorama, Hugin can automatically find such structures, called “control points”. In order for Hugin to know how to correct and shift the individual images, the software needs to identify individual structures that are visible in all images. ![]() Ensure that only images showing the same part of the sky are loaded. Alternatively, you can go to the “Images” tab and click the “Add individual images.” button. Once Hugin has started, navigate to the tab labelled “Assistant” and click on the “Load images.” button to load all your images into the software. This allows the alignment and stacking of images that were taken without a tracking mount. In principal, Hugin can also correct, shift, and rotate the individual exposures. This is useful whenever several exposures of the the same region of the sky need to be stacked in an attempt to create a single image with high signal-to-noise ratio and high dynamic range. This page explains how to stack astrophotos with the panorama stitching software Hugin. I will keep this page online, though, in the hope that some of the information may still be useful. Note: The instructions on this page have already become obsolete as a result of significant changes in the user interface of Hugin. Website of Tobias Westmeier - Astronomy - Stacking Astrophotos with Hugin Website of Tobias Westmeier Navigation ![]()
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