Image Viewer Plugin

Viewer plugin for high dimensional images in the ManiVault visual analytics framework.

git clone git@github.com:ManiVaultStudio/ImageViewerPlugin.git

Drag & drop an image data set from the data hierarchy into an open viewer or right-click a the data hierarchy item and select View -> Image Viewer. You can add multiple images to an image viewer instance and change their visibility and layering order.

Image viewers with open setting panel and single-channel colormapped images (left), a false color RGB image (right top) and a 2D colormapped image (right bottom). Each viewer shows a different high-dimensional image with several dozen data channels.

Next to layering, the image viewer is also capable of automatically layouting image datasets side-by-side (see gallery below). To achieve this, select multiple image datasets from the data hierarchy, right click View -> Images and select from either:

• Grid layout: images are arranged in a grid
• Horizontal: images are layed out left-to-right
• Vertical: images are arranged bottom-to-top-to
• Stacked: images are layered on top of each other (identical to adding multiple images via drag & drop)

Features

• Colormapping by dimension/channel:
  • Mono: Using a one-dimensional colormap
  • Duo: Using a two-dimensional colormap
  • RGB/HSL/LAB: map any data channel to any of the respective color space dimensions
  • Adjust brightness and contrast of each mapped dimensions
• Zoom and pan navigation
• Value interpolation: Nearest Neighbor and Bilinear
• Selections:
  • Automatically synchronize selections (default) or delay global notification until manual selection is finished
  • Several selection types: Rectangle (default), Lasso, Brush and Polygon
• Creating subsets: Create subset from selection
• Multiple layers:
  • View multiple image data sets
  • Adjust transparency individually
• Inspect pixel values of all currently rendered channels

Keybindings

Selection

• R Rectangle (default)
• L Lasso
• B Brush, circular: Mouse wheel adjusts the radius
• P Polygon: left-click to add a vertex, right-click to finish
• S Sample: single pixel, opens pixel value inspection overlay
• Shift Add to selection (while pressed)
• Control Remove from selection (while pressed)

Navigation

• Spacebar Switch to navigation when in selection mode (while pressed)
• Mouse grab Pan
• Mouse wheel Zoom
• D Zoom around selection
• Z Reset zoom to overview

Gallery

Have a look at the wiki for more showcases of the image viewer's feature set.

Select multiple images in the data hierarchy to open them side-by-side (left), e.g. in a grid (right)...

...or horizontal (left) as well as vertical (right)

Sample pixel values (left) and multiple imaged stacked (right)