<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Strict//EN"> <html><head> <link rel="stylesheet" type="text/css" href="cmunipack.css"> <title>Making master-dark frame</title> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> </head><body><div class="main_head"><p class="head"><a href="index.html">C-Munipack 1.2</a> / <a href="node006.html">User's manual</a></p><h1>Making master-dark frame</h1></div><p>The master-dark frame is an image made of several dark images. The dark image is used in a process of CCD image calibration. To reduce a noise of a result, it is advisory to make a number of raw dark frames and combine them into one correction frame. The Master-dark tool in the Muniwin program provides a simple method how to do that.</p><p>Clear the table of source files. Click on the <tt>Files</tt> -> <tt>Clear files</tt> item in the main menu.</p><p>Add raw dark frames to a table using the <tt>Files</tt> -> <tt>Add folder</tt> item or the <tt>Files</tt> -> <tt>Add files</tt> item. See the chapter Redution of CCD frames for details. Always combine files of the same exposure duration only.</p><p>Make a copy source files. Click on the <tt>Files</tt> -> <tt>Fetch/convert files</tt> item in the main menu.</p><p>Click on the <tt>Files</tt> -> <tt>Master-dark frame</tt> item. A new dialog appears. In the dialog, specify whether all files shall be processed or only the selected ones. Confirm the dialog by the <tt>OK</tt> button. In the following dialog select a directory and enter the name of output file where a new master-dark frame shall be saved to. Press the <tt>Save</tt> button.</p><p>When a task is finished, a new preview window appers. A new master-dark frame is displayed in the window.</p></body></html>
