Image Viewer Overview¶

Image Viewers allow you to view the images that are associated with a particular session (or experiment). You may select a project from a drop down list, then select a session in that project. The images belonging to that session appear in an Image List and the selected image is displayed in the Image View.

1 Anatomy of an Image Viewer¶

Primary Features:

Name	Description
Project Drop Down List	Projects that you own or have been shared will appear in the list. Select one to view.
Session Drop Down List	Sessions that belong to the currently selected Project will appear in the list. Select one to view.
Image List	The images belonging to the currently selected Session will appear in the Image List. The selected image will appear in the Image View. The total number of images is displayed at the top of the list.
Image View	The selected image will be displayed in the Image View. The Image View may be configured using the Image Tools controls located directly above the Image View.
Image Tools	Includes many basic image manipulation features such as filtering and Fourier Transform.

Image Viewer Screen:

 

2 Features available with all viewers¶

2.1 From the header buttons¶

1. View an aggregate summary of all the images in a session
2. Launch the Appion Image processing application
3. Launch a tool to create jpegs of all or many of the images in a session
    
   Image Viewer Header Buttons:
   

2.2 From the Image Tools panel¶

Bottom row

1. Adjust image properties
2. Mark images as hidden or exemplar

Top row

1. View a sideshow of the images in a session
2. Download individual images in mrc, tiff or jpeg format
3. View a detailed image report including mrc header information and calibrations and a comprehensive data tree to see all parameters about the image.
   
4. View the Fourier Transform of the image
5. View ACE graphs
6. View Particle Picks
7. View Leginon MSI focus and acquisition targets
8. Overlay a scale ruler
    
   Features of the Image Tools Panel:
   

2.3 Dequeue Tool: ¶

Used to remove queued targets on the image shown in the viewer and queued targets chosen on its direct descendant images. Clicking on it gives the number of active queued targets and the user can choose to remove them from the active list.

2.4 Drift Graph Tool:¶

Used to show the feature drift in a movie from frame-saving DD camera. The blue dot marks the beginning of the movie. The unit is in Angstrom.
This tool extract values from the frame alignment log of the selected aligned image.

3 Chose the right viewer for the job¶

Image Viewer applications available in Appion and Leginon web tools:

Viewer Name	Viewer Features
Image Viewer	provides a single image pane
2 Way Viewer	provides 2 image panes for viewing the same mrc file in different ways side by side
3 Way Viewer	provides 3 image panes for viewing the same mrc file in different ways
Dual Viewer	provides 2 image panes for viewing separate mrc images side by side
RCT	provides 2 images panes for viewing Random conical tilt image pairs
Tomography Viewer	provides summary of tilt series and tracking/prediction graph for Tomography images]

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