plugin:utilities:alpha_channel:start
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— | plugin:utilities:alpha_channel:start [2019/04/12 13:13] (current) – created - external edit 127.0.0.1 | ||
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+ | ====== Alpha Channel ====== | ||
+ | Creates transparent overlays from pasted images or the result of a filter operation. | ||
+ | ===== Introduction ===== | ||
+ | This ImageJ plugin filter applies an Alpha Channel immediately after a paste or filter operation. The output is a blend of the original and the result of the filter/ | ||
+ | |||
+ | After running 'Alpha Channel', | ||
+ | |||
+ | {{: | ||
+ | //Note that one could also use an alpha channel image with sharp edges (binary image) and create the soft edges by a nonzero value of ' | ||
+ | |||
+ | ===== Dialog Parameters ===== | ||
+ | * The **Alpha Channel** image must have the same size as the current image and be either an 8-bit or a float (32-bit) image. A pixel value of 0 reverts to the unfiltered/ | ||
+ | |||
+ | * **Range of Alpha Channel** defines the range of the alpha channel pixels (not taking any value calibration into account). In other words, the filtered/ | ||
+ | |||
+ | The alpha channel can be modified before applying it: | ||
+ | |||
+ | * **Enlarge by** increases the area by up to 20 pixels. Enter a negative number to shrink it. See [[gui: | ||
+ | |||
+ | * **Smooth Radius** is the radius (standard deviation) of a Gaussian blur filter applied to the alpha channel. | ||
+ | |||
+ | * Use **Preview** to examine the outcome of the operation. | ||
+ | |||
+ | ===== Notes ===== | ||
+ | |||
+ | * Use this plugin immediately after the filter or paste operation. | ||
+ | * When using this plugin, it is advisable to have the "Keep multiple undo buffers" | ||
+ | * After running this plugin, undo still reverts to the state before the previous filter or paste operation. | ||
+ | |||
+ | ===== Usage ===== | ||
+ | |||
+ | * Copy {{: | ||
+ | |||
+ | * Compile with “Compile and run”. | ||
+ | |||
+ | ===== Changelog ===== | ||
+ | |||
+ | * 2008-Dec-05 V 1.0 First Version (still {{: | ||
+ | * 2013-Jun-25 V 2.0 No ' | ||
+ | |||
+ | --- // |
plugin/utilities/alpha_channel/start.txt · Last modified: 2019/04/12 13:13 by 127.0.0.1