edithresh: Interactively Threshold (Color) Image

edithresh is an interactive tool for changing the colormaps of data objects. It supports colormap editing via thresholding. A threshold visual object is created and mapped to the screen. The threshold display includes a palette of pixels representing the values of the colormap, and a set of Lower, Upper, and Range scrollbars.

The features provided by edithresh include:

• Threshold Palette, an ordered range of vertical lines representing pixel values. Each color line represents an entry in the colormap. The leftmost color line is the first color in the colormap and the rightmost color line is the last color in the colormap.
• Lower/Upper/Range Scrollbars, reflect the lower bound, upper bound and the range of the thresholded values. The scrollbars are used to modify the colormap of a data object.
• Pixel Thresholding/Pixel Clipping, two policies of the threshold object. When pixel clipping is selected, the clipped region may be accepted or rejected. When pixel thresholding is selected, the threshold region may or may not be inverted.

Executing edithresh with the image "gull.viff" you will get

edithresh

Accesing the "Options" subform enables you to change the policy of the threshold object from Pixel Clipping to Pixel Thresholding and vice versa.

Option subform

edithresh can be executed from within cantata, or directly from the command line. To interactively process an image from the command line user interface (CLUI) type:

        edithresh -i image.filename

        edithresh -gui

GUI for edithresh

If you are interested in executing edithresh with the "gull.viff" image then click HERE