OMEGA and OMEGA-EP X-TVS/Y-TVS Viewers

VISRAD supports simulating the X-TVS/Y-TVS views for specific cameras for the OMEGA and OMEGA-EP chambers.

To display the X-TVS/Y-TVS Viewer, select the View | X-TVS/Y-TVS Viewer menu item.

Camera views are changed by clicking on one of the following buttons:

The buttons (in order) show the views for the:

Narrow field camera
Wide field camera
Smart camera
HS Video camera
No camera

The selected camera name appears just above the X-TVS and Y-TVS views.

The field of views for the OMEGA and OMEGA-EP cameras are given in the table below:

Camera Name (OMEGA)	Resolution (mm/pixel) X-TVS	Resolution (mm/pixel) Y-YVS	Field of View (w x h, mm) X-TVS	Field of View (w x h, mm) Y-TVS	Array size (w x h, pixels)
Narrow	5.1046 x 5.0100	5.1203 x 4.9963	10.454 x 10.261	10.486 x 10.232	2048 x 2048
Wide	24.1196 x 24.0211	24.1371 x 24.0500	49.397 x 49.195	49.433 x 49.254	2048 x 2048
Smart	78	78	50 x 37.5	50 x 37.5	640 x 480
HS Video	10	10	12.8 x 10.2	12.8 x 10.2	1280 x 1024

Camera Name (OMEGA EP)	Resolution (mm/pixel) X-TVS	Resolution (mm/pixel) Y-TVS	Field of View (w x h, mm) X-TVS	Field of View (w x h, mm) Y-TVS	Array size (w x h, pixels)
Narrow	4.9205 x 4.9048	4.9140 x 4.9048	4.921 x 4.905	4.914 x 4.905	1000 x 1000
Wide	14.9343 x 14.9098	14.8721 x 14.8699	30.585 x 30.535	30.458 x 30.454	2048 x 2048

In the case of the Smart camera, the VISRAD view is rotated 24.9 degrees to be consistent with the actual camera orientation.

When selecting a camera button, the field of view is set to the specifications for that camera, and the Zoom factor (slider) is set to 1. The zoom can be adjusted, but note that a zoom factor of 1 corresponds to the correct field of view for the selected camera.

The X-TVS and Y-TVS views in the X-TVS/Y-TVS Viewer can be rotated 180 degrees so as to be consistent with the view seen in the OMEGA Operations room. This is done using the check box in the upper right portion of the X-TVS/Y-TVS Viewer.

For grayscale rendering, lighting in the displays can be turned Off to more accurately simulate the actual X-TVS/Y-TVS viewing. To adjust color and lighting, use the Set | Color/Lighting menu item in the X-TVS/Y-TVS Viewer. The default rendering settings for the X-TVS/Y-TVS Viewer are Grayscale and Lighting Off.

When exporting an image for one of the OMEGA X-TVS/Y-TVS Camera Views, the default number of pixels is normally the resolution of the corresponding camera.

For OMEGA and OMEGA-EP, "silhouette" images for the Narrow and Wide camera X-TVS and Y-YVS views can be generated. These images have a transparent background so that they can be overlaid on the LLE TVS. To generate these images, select the File | Export Image | 1-Bit N/W Views menu item. Characteristics of the silhouette images include:

exported images have extended areas such that 100 pixels on each side on the nominal camera views are added.
reticles are not included in the images.
the transparency of the silhouette can be adjusted in the Graphics tab (Target Positioning Viewer box) in Preferences.
the supported image format is PNG (Portable Network Graphics).
users supply file base name and folder location for export; "-nx", "-ny", "-wx", and "-wy" are appended to the base file name ( "n", "w" for Narrow/Wide cameras; "x", "y" for X-TVS/Y-TVS views).

For more information, see Overview of Target Positioning Viewers.

VISRAD 19.3.0