VISAT Help - Image View

Image View

The image view displays the sample values of raster datasets such as bands and tie-point grids as an image.

In VISAT 3.0, the handling and inspection of products has been tremendously enhanced. Be sure to get acquainted with the concept of the Navigation Window and the GUI enhancements. Note that the image view window now has scrollbars. So, if you adjust the size of the image view, you are also able to change the visible part of the image by moving the scrollbars.
In the bottom right corner of the image view window, there is a small button: . A click on this button will adjust the magnification of the image to fit into the window. This has the same effect like using the "Zoom All" icon of the Navigation Window.
Besides this, there are two new important tools to navigate through an image and to inspect pixels in detail:

Multiple Windows of the same band

It is now possible to open more than one window of the same band to have several views on the band. This can be done by right-clicking on the band name in the Product Scene View. The windows will be numbered according to their appearance:

Context Menu

When you right-click the mouse over the image view a popup menu comes up:

Entries:

Copy Pixel Info to Clipboard - copies all sample values at the current pixel position, their names and physical units (which you also can see in the pixel view) to the clipboard
Delete Shape - deletes the current geometric shape from this image view, if there is any
Export Displayed Image - exports the current image to an image file format (JPEG, PNG, TIFF, BMP)
Export ROI Overlay - exports the current ROI overlay from this image view as a bitmask image
Export Color Legend - exports an image of the color legend
Export KML - exports the current Image to a KML file supported by Google Earth
Show ROI Overlay - toggles the visibility state of the ROI overlay
Export ROI pixels - export pixel values of a ROI to clipboard or file
Show Graticule Overlay - toggles the visibility state of the graticule overlay
Show Pin Overlay - toggles the visibility state of the pin overlay
Create Subset from View - opens a new product subset dialog, with predefined spatial subset scene by the actual image view

Note: The Copy Pixel Info to Clipboard command copies information as tabulator-separated text into the clipboard and may therefore be pasted directly into a spreadsheet application (e.g. MS Excel).

RGB Image Support

On creating an RGB image view you are prompted to select or create a RGB-Profile. You have also the possiblity to create new and change existing profiles in the user preferences.

Note: The band to be used for each of the channels in the current RGB image view can be changed at any time in the Contrast Stretch / Color Palette window.