ndisplay -- Display a science image and overlay DQ flags
ndisplay image frame
Display a science image and overlay its associated DQ flags. Originally written for NICMOS images, ndisplay can be used for any HST dataset using the multi-extension FITS format for storing SCI, ERR, and DQ arrays. This is a script that simply calls the IRAF display task to display the science image and then calls the markdq task to mark the DQ flags on the displayed image. All parameters for those two tasks can be used to control the display characteristics, such as intensity transfer function and colors of the marked DQ flags.
The input image name to this task must be that of the science image to be displayed. The name of the associated DQ image will be derived from the science image name.
- Science image to be displayed and marked with DQ flags.
- The frame or image plane number of the display to load.
1. Display the science image in the calibrated file n3t502cur_cal.fits and overlay its associated DQ flags:
cl> ndisplay n3t502cur_cal 1
2. Display the science image from imset 3 of the intermediate Multiaccum file n3t502cur_ima.fits and overlay its DQ flags:
cl> ndisplay n3t502cur_ima[sci,3] 1
Author: Howard Bushouse, SSG/SSB