Use Isosurface to extract and measure a feature is easy and convenient, but it only works on very clean dataset, with very limited capability. Measure the propellant volume by segmentation ¶ Save the project, choose autosave to save your customized colormap, and any new data you created for that matter. If you want to save this colormap you just edited, click spot 10 to invoke the save file dialog, save to a new name, inside your project file folder.Ĭlick spot 11 to switch to data range view, drag the three black triangles (see screen shot below) to change the colormap applying range. For any type of key point, left click to select, drag to move, and right click to delete.Ĭlick on spot 6 and 7, to set color (RGB) for min-max color key points.Ĭlick anywhere underneath color bar, in area 8, to add a new color key point, edit color details in key point edit panel.Ĭlick anywhere in the graph area 9, to add a new opacity key point, edit opacity details in key point edit panel.Įxplore the colormap editor more, see the visualization updates. There are two types of key points: color and opacity. You can edit data value, color (RGB) and opacity (alpha, A) at a selected key point. For later steps, refer to the screenshot below for spots to click on.Ĭlick on spot 1 and 2, to edit min-max value, same effect with step #2.Ĭlick on spot 3 and 4, to set color for data value out of min-max limit.Ĭlick on spot 5, to expand the key point edit panel. First change Colormap lookup to rgba, then click the Edit button in Colormap item, choose Options->Edit colormap., the Colormap Editor window will open, drag it around and resize Avizo window layout so we can easily edit the colormap and see the rendering updates. Now let’s customize the colormap to what we really want for this dataset. Play with different properties settings, try to understand how they reflect to the rendering changes. In Properties panel, look for Alpha scale item, set value to 0.25. In Properties panel, look for Colormap lookup item, change from rgba to alpha. There are two text input boxes where you can set the data value limit (min,max) for volume rendering computation, set min value to 27000, press enter in keyboard, see the rendering changes. In Properties panel of Volume Rendering module, look for Colormap item, click the Edit button, choose volrenWhite.am as the default colormap. Make the visualization smaller by zooming out a bit, volume rendering is computationaly expensive, less visualization pixels may speed up the rendering for you. Hide the Orthoslice module in project view network, so we only look at the volume rendering itself. Visualize the bullet structure using Volume Rendering ¶Īttach Display->Volume Rendering module to the bullet data object. Next time you can just open the project and the visualization network will be restored. Right click on data object icon and save data as Avizo format (.am), so next time you don’t need to input the file information again.Īttach Measure->Histogram module to the bullet data object, click Apply, a histogram window will show up, which tells you the data value distribution of the bullet dataset.Ĭhoose the ortho projection mode, use the measure tool (top layer tool icons, look for the ruler shaped icon) to measure the diameter and height of the cartridge in pixels, multiply by pixel size (55 µm)Ĭompute the volume as: bullet-volume = pi * radius * radius * heightįile->Save Project As, to save the project. Attach Display->orthoslice to visualize (left-click to choose the data object, then right click to choose the orthoslice module). A data object icon will appear in the object pool. Launch Avizo 7, file->Open data as, choose the bullet binary dataset, click open, in the popup window, choose RAW data, click ok, input correct dataset inforamtion (243x243x227, z-fastest, little endian), click ok to load data into Avizo. Measure the cartridage volume using manual measuring tools ¶
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