First, the user selects the appropriate frame and moves the cursor to any corner of a region to be used as defining a bad region. If x or y is selected, a diagnostic message is printed on the alpha terminal indicating that definition of a new region is in progress. The program obtains the frame number from the imtool feedback and determines which image corresponds to this frame buffer. The coordinates of the box corners and the type of interpolation are appended to the appropriate bpfile for that buffer. If c is selected, the previously specified interpolation region is appended to the bad pixel file corresponding to the other image, and the region is marked on the display for the other image.
Examples See markpix for examples.
See the file imtool.colors for valid choices of the xcolor and ycolor codes. Most regions of the CCD image will require x interpolation.