39 lines
4.4 KiB
HTML
39 lines
4.4 KiB
HTML
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml">
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<head>
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<title>Luminance HDR User Manual — Creating HDR images — Editing Tools</title>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<link href="style.css" rel="stylesheet" type="text/css" />
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<body>
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<h2>Using Editing Tools</h2>
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<br />
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Within Editing Tools it is possible to do some manual editing activities before performing the hdr merge.<br /><br />
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<!--IMG src="images/EditingTools-2.jpeg" alt="Editing Tools" width="800" height="468" align="middle" border="0"--><br />
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<p><IMG src="images/editingtools-1.png" width="600" /></p>
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Using the arrow buttons shown in the bottom right part of the window you can shift the editable image to better align it.<br />
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Press <strong>shift</strong> to shift the image by 10 pixels, <strong>control</strong> to shift by 50 pixels and <strong>shift+control</strong> to shift by 100 pixels.<br />
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Use the visualization mode combo box on the upper left of the window to help you with the alignment. The best mode for aligning the images is <strong>Difference (E-P)</strong> where the difference between the editable and reference images is shown.<br />
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After aligning the images you can crop them drawing a selection box and clicking on the <strong>crop</strong> button. Then you can save them for future use, all the relevant <em>EXIF</em> data will be saved as well.<br />
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Now, if needed, you can proceed removing the ghosting artefacts resulting from moving objects in the scene. You have two options: manual and auto anti-ghosting.
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The auto anti-ghosting is pretty straightforward, just click on the <strong>Auto anti-ghosting</strong> check box and select a threshold value. Clicking on the <strong>Recompute</strong> button a series of patches is computed and visualized so that you can actually see how well the "ghost" it will be removed.<br />
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The patches must cover all the affected <em>"ghosting area"</em> but, especially with misaligned images, it is possible that some patches will cover even anaffected areas. If this happens you can increase the threshold and recompute the patches again or you can manually add or remove patches just clicking on the image on the position you want a patch to be removed or added (clicking on a patch will remove it). Once you are done you can click <strong>next</strong> to close <strong>Editing Tools</strong> and continue with HDR merging.<br /><br />
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<!--IMG src="images/EditingTools-0.jpeg" alt="Anti-ghosting Patches" width="800" height="468" align="middle" border="0"--><br />
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<p><IMG src="images/editingtools-2.png" width="600" /></p>
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If you prefer it is possible to manually draw a mask over the "ghost" using a <em>lasso</em> or a <em>brush</em>. To access the manual anti-ghosting feature click on the <strong>Anti-ghosting</strong> button. New options to work with the mask will then appear, you can chose the size of the brush, the mask <em>strength</em> (draw the mask semi-transparent), if to add or remove the mask while drawing. You can also save a previously created mask and apply it again to another image.<br />
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You now must select the <em>good image</em> from the list, the <em>good image</em> is the one that will be left unchanged after ghost removal.
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Keep in mind that you must draw a mask even on the <em>good image</em>. Basically all the pixels that change in <strong>all</strong> images must be covered by a mask. The <strong>Difference (E-P)</strong> visualisation mode will help you discovering the ghost affected areas of the scene.<br />
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The image below shows and example of a mask covering just a part of the <em>ghost</em>.<br /><br />
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<!--IMG src="images/EditingTools-1.jpeg" alt="Manual Anti-ghosting" width="800" height="468" align="middle" border="0"--><br />
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<p><IMG src="images/editingtools-4.png" width="600" /></p>
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<div align="center">Example of anti-ghosting mask</div>
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<!--IMG src="images/Ghost-0.jpeg" alt="Ghost in HDR" width="800" height="433" align="middle" border="0"--><br />
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<p><IMG src="images/editingtools-5.png" width="600" /></p>
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<div align="center">Final HDR without ghost removal</div><br />
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<!--IMG src="images/NoGhost-0.jpeg" alt="Final HDR with no ghost" width="800" height="433" align="middle" border="0"--><br />
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<p><IMG src="images/editingtools-6.png" width="600" /></p>
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<div align="center">Final HDR after performing manual anti-ghosting</div>
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</body>
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</html>
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