Valid selections are listed in the file imtool.colors . The markpix2 task is a version of markpix intended for use on two images simultaneously. A box is drawn around the indicated regions, with different colors for x and y interpolations, and the coordinates are saved on the output file for use with pppfixpix . The user provides the name of the images image1 and image2 on which to locate bad regions and the name of the output files bpfile1 and bpfile2 to list the bad regions. Otherwise, the output files are initialized upon marking of the first bad regions.
Subsequent input is read from the image cursor.
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.