Interactive Exploration with Image Viewer App

View, explore, and edit images interactively using the Image Viewer app

Use the Image Viewer app to view and explore images. Image Viewer includes tools that you can use to examine image pixels in detail, crop an image, and measure distances between pixels. Use the imtool function to launch Image Viewer.

If you want to interact with a large image using Image Viewer, then you may notice that zooming and panning actions can be slow, or the image may not load. If this happens, create a reduced resolution data set (R-Set) to improve performance. You can use Image Viewer to navigate an R-Set image the same way you navigate a standard image.

Apps

Image Viewer

View and explore images

Functions

expand all

Open Image Viewer App

imtool Open Image Viewer app

Explore Images Using Image Viewer Tools

`imageinfo`	Image Information tool
`imcontrast`	Adjust Contrast tool
`imdisplayrange`	Display Range tool
`imdistline`	Distance tool
`impixelinfo`	Pixel Information tool
`impixelinfoval`	Pixel Information tool without text label
`impixelregion`	Pixel Region tool
`immagbox`	Magnification box for image displayed in scroll panel
`imoverview`	Overview tool for image displayed in scroll panel

Set Image Display Preferences

`iptgetpref`	Get values of Image Processing Toolbox preferences
`iptprefs`	Display Image Processing Toolbox Preferences dialog box
`iptsetpref`	Set Image Processing Toolbox preferences or display valid values

Reduce Resolution of Large Data Sets

`isrset`	Check if file is valid R-Set file
`openrset`	Open R-Set file and display R-Set
`rsetwrite`	Create R-Set file from image file
`imtool`	Open Image Viewer app

Topics

Interact with Images Using Image Viewer App

You can display, explore, and process images interactively with Image Viewer app.

Explore Images with Image Viewer App

You can use navigation aids to magnify and pan across images. You can also see an overview of the entire image with a rectangular overlay that indicates the current region in view.

Get Pixel Information in Image Viewer App

You can display information about the location and value of individual pixels or small neighborhoods of pixels. This information updates as you move the pointer over the image.

Adjust Image Contrast in Image Viewer App

You can adjust image contrast by manipulating the histogram of intensity values or by setting the window and level.

Crop Image Using Image Viewer App

You can extract, or crop, a rectangular region of the image. You can fine tune the size and position of the crop region.

Measure Distance Between Pixels in Image Viewer App

You can measure the length of a line segment drawn between two pixels. You can refine the position of the line segment and make multiple measurements.

Get Image Information in Image Viewer App

You can get information about the image dimensions, class, image type, and file metadata.

Manage Display Preferences

You can view and edit preferences to control how images are displayed on your screen by default.