 | HuginHugin is a toolkit for stitching photographs and assembling panoramas, together with an easy to use graphical front end. |
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Hugin Description
Hugin is a toolkit for stitching photographs and assembling panoramas, together with an easy to use graphical front end. Hugin is a panorama tools GUI.Goal: an easy to use cross-platform GUI for Panorama Tools.With hugin you can assemble a mosiac of photographs into a complete immersive panorama, stitch any series of overlapping pictures and much more.Main WindowThis window consists of a toolbar that provides quick access to important functions. It also contains the Images, Lens, Control Point, Optimizer and Panorama Tab, which will be explained below.Images TabImages can either be added with the Add button, or via drag and drop. To change the orientation of one or more images, select them in the list on the left. The image will be show in the preview area, and its orientation (yaw, pitch and roll values) can be edited on the left. It is possible to select multiple images at the same time. Changes in orientation will be applied to all selected images Lens TabThe lens tab looks a lot like the Images tab, except that the lens settings can be edited here. As in the Images Tab, multiselection can be used to change the parameters for multiple images. Currently only one lens is supported. The idea is that the Lens describes the process that was used to create the image. The most important parameters are the Lens type and the HFOV (Horizontal Field of View). Hugin will read the EXIF information in jpg files created by digital cameras, so usually it is filled out correctly. Photographers do not use a HFOV in degrees, but the focal length. The focal length can be entered and it will be converted to HFOV in degrees, like the panorama tool require it. The focal length entered is taken to be for 35 mm film cameras. Usually images are more or less distorted. This can be seen especially if there are long straight lines close to the image border, which are usually not completely straight but bent a little. The a b and c parameters are used to remove that distortion. They are applied radially from the image center, which can be moved by changing the d and e parameters. During image capture, it is possible that the parameters vary, that is are not the same for each image. This can have many reasons, one of the could be a scanner that cuts a way a few pixel more at one side than the other. Other parameters stay the same, like usually the a,b and c parameters (if the zoom and focus for the images is the same). The inherit checkmark means that this parameter doesn't vary between the images that were captures with that lens setting. If a parameter is inheritied it is forced to be the same for all images. When inherited parameters are optimized they are kept the same for all images, whereas parameters that are not inherited can get values specific for a single picture. Control Point TabControl Points are probably the most important thing when using panorama tools. The Tab consists of two image displays and tab bars to switch images to be editied. The bottom contains a list view where Points can be selected and some fields to edit a selected point. Points can also be selected by clicking or dragging on them in the images. It is possible to zoom out to show the full image. Adding a control point works by clicking into one image to select a point and then into the other image. If auto add is not set, the points can be moved by clicking at some other place in the images. They are added to the list of control points by pressing the right mouse button. If you press the right mouse button when only one point is slected, the point selection will be aborted. auto add adds the control point as soon as both points have been specified. Control point creation is influenced by the following checkboxes: auto fine tune hugin helps you to find the second point by looking for it in a search region (shown by a rectange around the cursor). This might not always work, but usually is reliable, if the image distortions are not too big. Try and play with it. auto add A control point is automatically added when both points are know. You won't have time to refine the selection before adding the point. auto estimate Tries to estimate the position of the second point by estimating the translation between the two images. This is very crude and probably only works for single row panoramas created from rectilinear images. All these flags can be combined. I typically use auto fine tune and auto estimate at the same time. Then hugin usually automatically selects the second point correctly. Well for single row panos that is... The images are zoomed out, the first click zooms to a temporary 100% view to give you the chance to refine your selection. Note that only the second click will trigger the auto estimate. The Fine Tune button can be used to find a better position for the point in the right image for already selected point. Contrary to auto fine tune it only looks in a very small area around the point. This function is especially useful if you moved both points by hand, but want to have fine tuned control points. Press the middle mouse button to pan the image. If you press shift key while paning, both images will move. This window supports some keyboard shortcuts: a add a new point that has been selected in both images, and the auto add is switched off. cursor keys scroll image under the mouse cursor shift + cursor keys scroll both images at the same time f fine tune currently selected control point pair. Same as the Fine Tune button Del Remove currently selected control point. 0 Zoom out to full view. 1 100% view. Mouse function Function control key + mouse movement Scroll image under cursor shift key + mouse movement Scroll both images left button Use left mouse button to select new points or drag existing points. right mouse button Add control point, if auto add is switched off middle mouse button Scroll image under cursor shift + middle mouse button Scroll both images Optimizer TabThe optimizer moves the images into the right position, so that they can be assembled into a hopefully seamless panorama. To select what the optimiser should try to estimate, use the Optimize combo box, then click the Optimize Button. If you select the "custom" setting, you can change Pano PanelOptions concerning the output panorama can be set here. Requirements: · PanoTools What's New in This Release: The last release in July 2009 introduced several major new features, but took a long time to arrive. This release follows quickly with the intention of tracking development better with more frequent releases, even so we still have some great new features and smaller improvements: Hardware accelerated stitching: · Hugin ships with nona for reprojecting and distorting photos. Nona will use multiple processors in parallel on a 'multi-core' system, but now it can use the GPU of your graphics hardware instead - Potentially many times faster and freeing your computer for other tasks. This GPU accelerated stitching is still experimental and requires a modern graphics card. Control point creator presets: · Hugin aligns images by matching features, known as 'control points'. These control points can be created manually in the Hugin Control Points tab or automatically by a 'control point creator'. Due to patent encumbrances in the USA, Hugin doesn't ship with an internal control point creator, but makes it possible to use an external tool such as Autopano-SIFT-C or Pan-o-Matic as a 'plug-in'. · Hugin now comes pre-configured with typical settings for common plug-ins and lets you add your own. Switching between tools is now simple - Even allowing you to match different parts of a single project with different plug-ins. Exposure layer fusion: · Hugin uses two related tools for joining reprojected photos together. Usually any 'bracketed stacks' are first combined with enfuse into a single image using the best exposed bits from each, then these 'exposure fused' images are 'seam blended' with enblend into the final panorama. · This works very well, but what if your camera doesn't have a bracketing mode? In this case you have to take an entire panorama, change the EV setting, then take the panorama again, so there is no guarantee any of the shots will line up into 'stacks'. Hugin now has an extra stitching mode where photos with similar exposures are grouped and seam blended into 'layers' with enblend, then these layers are 'exposure fused' into a final panorama with enfuse. Visual control points: · The last release introduced the Fast Preview window for manipulating the panorama visually in real-time - Coming soon to this window will be some great new features to help you manage every aspect of panorama creation. · This release has a taster of these new features, with a new mode to show control points in the Fast Preview window itself. EXIF metadata display: · Photos produced by digital cameras contain useful hidden metadata such as: date taken, camera model, shutter speed, aperture and focal length. In the Images tab Hugin now displays some useful metadata for the currently selected photo. Languages: · Most translations have been updated. New version naming: · It is often noted that with version numbers like 0.8.0, Hugin looked like pre-release software - In reality Hugin is very usable for anyone, from holidaymakers just wanting to stitch a single panorama, to professional photographers and scientists needing a day-to-day workhorse. · So in practice, Hugin reached version one a long time ago. With this release we are switching to a date based system similar to many other Open Source software projects. This is the second stable release this year, so we are calling it 2009.2.0, the next stable release this year will also be even-numbered 2009.4.0 and so on. Snapshots of the development trunk would have odd-numbers, e.g. 2009.3.0. Other improvements: · There are many more improvements to Hugin in this release: More options in the preferences, better error messages for when things do go wrong, fixes for lots of reported bugs, and better support for packagers on BSD, Linux, OS X and Windows. · Control point generators · Hugin doesn't yet ship with a 'Patent Free' control point generator. So you either need to pick control points manually - Not as difficult as it sounds - or install and configure one of the following control-point generators as 'plug-ins': autopano-sift-C; panomatic; match-n-shift; Autopano-SIFT; Autopano freeware version.
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