98 lines
5.9 KiB
Plaintext
98 lines
5.9 KiB
Plaintext
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0//EN" "http://www.w3.org/TR/REC-html40/strict.dtd">
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<head>
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<style type="text/css">
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h1, h2, h3, h4 { padding:0px; margin:10px; }
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p { padding:0px; margin:5px; }
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img { margin: 5px; }
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</style>
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</head>
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<body>
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<h2>Tenmon help</h2>
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<p>Tenmon is intended primarily for viewing astro photos and images. It supports the following formats:
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<ul>
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<li>FITS 8, 16 bit integer and 32 bit float</li>
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<li>XISF 8, 16 bit integer and 32 bit float</li>
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<li>JPEG and PNG images</li>
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<li>CR2, NEF, DNG raw images</li>
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</ul>
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</p>
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<h3>Main windows</h3>
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<p>The main window shows the currently loaded image. On the left is the <i>Image info</i> panel which displays details about the loaded image.
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The <i>File system</i> panel shows other images in the same directory as the loaded image. At the top is the main menu and below that is the
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<i>Stretch panel</i> containing various options for auto-stretching linear image data.</p>
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<p>All panels in the interface can be moved around and/or closed. Any closed or non-visible panel can be
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re-opened through the <i>Docks</i> menu at the top.</p>
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<h3>Opening and saving images</h3>
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<p>To load an image select <i>File->Open</i> and choose the file. After a file is loaded, it becomes visible in the main image panel, and the
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<i>File system</i> panel will show the other images in the same directory.</p>
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<p>The loaded image can be exported to a different format with <i>File->Save as</i>. Any of the formats JPEG, PNG FITS and XISF can be selected.
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In the case of saving JPEG or PNG, the stretch function is applied to the saved image. FITS and XISF are saved/converted without applying the stretch.
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To open an image, you can also drag and drop it to main window.</p>
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<h3>View</h3>
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<p>The <i>View</i> menu has options to control the size and scale of displayed images:
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<ul>
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<li><i>Zoom In</i> and <i>Zoom Out</i> magnify and shrink the image. The mouse wheel can be also used to zoom freely.</li>
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<li><i>Best fit</i> auto-zooms the image to fit the current size of the window.</li>
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<li><i>100%</i> will zoom to 1:1 scale.</li>
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<li><i>Fullscreen</i> enlarges the main window to the whole screen.</li>
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<li><i>Thumbnails</i> will display small thumbnails for all images in the current directory.</li>
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</ul>
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</p>
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<h3>Stretch toolbar</h3>
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<p>This panel changes how images are displayed.
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<br><img src=":/about/stretch-panel.png"></p>
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<p>Starting on the left, there is slider scale with three adjustable points to manually control the stretch.
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<ul>
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<li>black point - all pixels with lower value (darker) than this setting will be clipped black</li>
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<li>mid point - defines the value to be stretched to 50% intensity</li>
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<li>white point - all pixels with higher value (brighter) than this will be clipped white</li>
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</ul>
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Following the slider are 5 buttons for automatic stretching:
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<ul>
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<li><i>Auto Stretch</i> automatically apply black and mid points to render the image with optimal brightness.</li>
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<li><i>Reset</i> reset three values for black, mid and white point to default.</li>
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<li><i>Invert</i> invert colors to display the image as negative.</li>
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<li><i>Super pixel CFA </i> average 2x2 pixels into one (suitable for images from colour camera).</li>
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<li><i>Apply Auto stretch on load</i> toggle automatically applying Autostretch for each image when loaded.</p>
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</ul>
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<h3>Marking images</h3>
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<p>Images can be marked in the <i>Select</i> menu. To show a list of only the marked images, use <i>Select->Show marked</i>.
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This dialog can be useful to clear marks from images. Marked images show a <b>*</b> character in the title bar of the main window.
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Marked images can be copied or moved to a selected directory with <i>File->Copy/Move marked files</i>.
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After copying or moving, the list of marked files is cleared. The list of marked files will be remembered after quitting the program.</p>
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<p>Another way to mark images is in database view where you can select rows and then select mark or unmark action in context menu. Marked
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files will be shown with bold text. Third way to mark files is from thumnails view where you can press press <i>Shift</i> and click with left
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mouse button and drag across thumbnails to mark them. Holding <i>Ctrl</i> will unmark files.</p>
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<h3>Database of FITS/XISF files</h3>
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<p>Tenmon can scan a directory of FITS/XISF files and index metadata from FITS headers into it's internal database. This allows searching and sorting images based on that metadata.</p>
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<p>To populate the database, select a directory of FITS/XISF files with <i>File->Index directory</i>.
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After the selected directory is searched, metadata parsed from the images will be stored in the database.
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To refresh the database, run <i>File->Reindex</i>. This will update any changed metadata and remove any record of
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deleted files. To index new files, simply run <i>Index directory</i> again.</p>
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<p>The database is viewed through a panel which is not visible in the default layout. To add the database panel to the view,
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toggle <i>Docks->FITS/XISF database</i>. Once visible, database panel shows the database as a table with a column for each property.
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Below the table is button to select which columns/properties are displayed.</p>
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<p>Also at the bottom of the database panel are three combo boxes and text inputs used for filtering.
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Select the property to filter on with the combo box and in the adjacent text box enter a string to search for in that property.
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<p>Wildcards:
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<ul>
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<li><b>%</b> (percent) is a wildcard representing zero or more of any characters.</li>
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<li><b>_</b> (underscore) is a wildcard for exactly one of any character.</i>
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<li>Without wildcard characters, the exact string must match.</li>
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</ul>
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</p>
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<br><img src=":/about/filter.png"><br>
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This example filters for files where: "Bias" is in the file name, the OBJECT property is "M_42" (where the underscore can be any single character), and the DATE property begins with "2022".
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</p>
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<p><small>PS: Kanji in icon means astronomy in Japanese</small></p>
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</body>
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</html>
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