Table of Contents

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Registration workspace

Using registration workspace, users can align a source image with respect to a template image. Following diagram shows the design on this workspace:

Default behavior for this workspace is as follows:

• Top panel displays a section for selecting source and template data.
• Center panel displays a combobox to select the registration plugin. Once a plugin is selected, its GUI will be shown in the center panel.
• By default, MBAT provides the following registration methods: (* Note that API users can add other registration methods by creating registration plugins.)
  • Landmark warp

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Adding data to source and template sections

Adding from file(s)

• To add a file to the sources list, select the source data section by clicking on it. Next, click on the Plus button located between the source and the template sections. Clicking on this button will open up a file selection box using which user can specify the file to load in the source data section.
• To add a file to the template list, select the template data section by clicking on it. Select the template file as specified in the previous step.

Adding from the cart

• Open the Cart.
• To add an object from the cart to the sources list, select the source data section by clicking on it. In the cart, select the object to add and click on the Open button (arrow icon). The selected cart object will be added to the sources list.
• To add an object from the cart to the templates list, select the template data section by clicking on it. Select the cart object as specified in the previous step.

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Saving the result to the cart

• To save the result image to the cart, click on the Add to cart button.
• System should now display the result image in the cart manager.
• Users can now use this cart object for further processing in any other workspaces.

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Landmark warp

1. Applying Landmark warp to source image:
   • Click on an image in the source section to use this image as a source image.
   • Click on an image in the template section to use this image as a template image.
   • Click on the Apply button.
     • System will display both the source and template images along with other information such as filename and size in pixels.
     • Hovering the mouse on the source/template image displays X & Y co-ordinates of current location below the image.
   • Specify landmarks on both source and template images by moving the mouse over the corresponding area and clicking right mouse button (CTRL + Mouse click for Macintosh)
     • Landmarks are shown as green squares on the images.
     • To change the location of a landmark, left click on the landmark. This will change the landmark color to red. Draging the mouse to new location while keeping left button pressed will move the selected landmark to the new location.
     • At least 3 landmarks should be specified before applying any warping algorithm to the source image. The Warp button will get enabled only after at least three landmarks have been specified by the user.
   • Select registration method to be used for warping. Currently, MBAT core shows following registration methods in the drop-down box:
     • linear list squared best fit
     • Non linear spline
       • elastic pde w/ linear forces (non radial basis)
       • elastic pde w/ hyperbolic forces (non radial basis)
       • biharmonic equation (thin plate spline radial basis)
       • inverse multiquadratic radial basis
       • guassian radial basis
       • wendland radial basis
   • Click on the Warp button to apply the warp. System will apply the specified warping algorithm on the source image to produce a warped image. The warped image is displayed in the right side image display area.
2. Deleting a landmark:
   • Select the landmark to be deleted by left clicking on the landmark position.
   • Selecting a landmark activates the Delete button located on the left side of source image pane.
   • Clicking on the delete button should remove the landmark point from both the source and the template images.
   • Note that if the number of active landmark points goes below three, the Warp button is disabled by the system.
3. Zoom in/out images:
   • Select the image(/s) by clicking on the Apply Zoom checkbox located at the right bottom side of each image pane.
   • Click on zoomin/out buttons to zoom in or zoom out respectively.
4. Reseting changes:
   • Select the image(/s) by clicking on the Apply Zoom button located at the right bottom of the each image.
   • Click on the Home button to reset any zoom related changes made to the selected image.
5. Saving the warped image to cart:
   • To save the result image to the cart,click on the Add to cart button.
   • System should now display the result image in cart manager docking panel.
   • Users can now use this image for further processing in any other workspaces.
6. Saving the warped image to local file:
   • Click on the Save button to store the image to a local file.

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