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| − | === Image from pieper on Tuesday, August 08, 2006 at 4:26PM ===
| + | <big>'''Note:''' We are migrating this content to the slicer.org domain - <font color="orange">The newer page is [https://www.slicer.org/wiki/Slicer3:VisualBlog_Extension here]</font></big> |
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| − | A number of things have come together to allow the new prototype editor module:
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| − | * the label map layers are enabled
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| − | * lookup table support in the layer logic
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| − | * a new set of 2D UI widgets
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| − | * generalized painting infrastructure, which is based on requests and feedback from NA-MIC Core 3 users and other users of Slicer2
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| − | ** paint brush has a 'threshold' option in which the label map only gets painted if the background intensity is in a specified range
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| − | ** paint brush optionally won't overpaint existing voxels
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| − | ** 'eye dropper' mode allows you to start painting with the label value where you first clicked (so you don't need to go to the UI to change the label color as often).
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| − | ** all painting operations can happen on arbitrarily transformed volumes. This allows the painting plane to be aligned with the major axis of a structure like the hippocampus
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| − | ** background layers are interpolated to current screen resolution (not limited to nearest neighbor sampling as in slicer2's draw mode)
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| − | ** painting is performed using a circular brush with a diameter selected by the user. this makes it easier to follow the contours of curved biological structures.
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| − | ** the cursor is turned off on mouse down and reappears on mouse up so you can see the exact pixels you are drawing (a circle around the cursor location indicates the mouse location)
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| − | A few limitations make this still a 'prototype' including:
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| − | * there's no convenient way to save your label maps volumes (except as dicom)
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| − | * the color map is currently random
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| − | * only label numbers 0-255 will show as distinct colors
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| − | * no hot keys for frequently used operations
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| − | * brush radius is in screen space units rather than RAS (means that the brush is effectively getting bigger and smaller as you zoom in and out)
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| − | * the paint algorithm is implemented inefficiently and can be slow when painting large numbers of pixels
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| − | * much of the code is written in tcl - new vtk classes are needed to implement the functionality more efficiently.
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