RCT node set-up » History » Revision 8
Revision 7 (Anchi Cheng, 07/05/2013 02:48 PM) → Revision 8/12 (Anchi Cheng, 07/05/2013 03:33 PM)
h1. RCT node set-up h2. Acquisition Settings that is unique to this node: * Move Type: *Must be stage position or modeled stage position* * [[Iterative Stage Movement]] Option is ON * Navigator Acceptable Tolerance should be set so that sufficient overlap between tilt pairs can be achieved. h2. Testing feature finding algorithm The default values in the RCT node may not work for your sample, trials should be made to optimize the parameters. The good parameters should find hundreds, but not thousands of features in your untilted image for good results. 1. Presets Manager> send the preset used in "Centered Square" to scope at the center of a square. 2. RCT/toolbar> Click on the "acquire" button at the far right to acquire a test image of which the feature finding algorithm will be applied after the acquisition. 3. RCT> Check the result of the numbers of feature found. A few hundred but not thousands would be a good settings. 4. RCT/Settings> Adjust Min Feature Size (most sensitive) and/or Max Feature Size or the filters and then repeat 2 and 3 to get better results. !good_feature_finding.png! !good_feature_finding_tilted.png! Example of a good feature finding: There 5. Target templates are good number of features. In addition, applied to the obvious features, valid raster points to create the center of most holes in final acquisition and focus targets. The template can be constant, meaning that it is defined relative to the 3x3 hole patterns are identified. As a result, many of the features image coordinate. The template can also be consistently identified after convolved with the distorting of tilting. !bad_feature_finding.png! !bad_feature_finding_tilted.png! raster Example of a bad feature finding: Even though points which will create multiple targets, each defined relative to the number coordinate of features are in the hundreds, the obvious features are not found because both Min and Max Feature Sizes are set too small. As a results, most features are lost after tilting (right panel) and unrelated features are found instead. valid raster points. * Min/Max Feature Size: if < 1, it means faction of the image area. If > 1, number of pixels. * List of Tilts to Collect are in the order of data collection * RCT node has its own drift monitoring after each tilt at the transformed focus target position. Therefore, drift threshold and drift preset need to be defined. _see also [[RCT run protocol from a user]]_ ______ [[Summary of this application - MSI-RCT|< Summary of this application]] | [[Presets for MSI-RCT applications|Presets for MSI-RCT applications >]] ______