Table of Contents
Arguments for ReadImage and Show
ReadImage
ReadImage reads a single image file. Besides the required file name, it has three optional arguments and a flag:
| Argument | What it does | More |
|---|---|---|
| bands | Picks out specific spectral bands from the image | Spectral Band Arguments |
| window | Reads only a rectangular window of the image | Window Arguments |
| multipage | Picks one image from a multiple-image TIFF file, such as a multiband GIMP file. Images are numbered from 0, the default | |
| calibration | Calibrates the data as it is read, using the calibration file in the image's folder | Read Calibrated Images |
Creating a calibration file is part of the Advanced level. Calibration works only on single-band image files, and if “calibration” is checked but there is no calibration file, the job stops.
Show
Show displays the image in its own window. It has three optional arguments and a flag:
| Argument | What it does | Default |
|---|---|---|
| scale bands | Adjusts the contrast of each band separately, or of all bands together | separately |
| window | A window whose data is used to adjust the contrast | the full image |
| title | A title written at the top of Show's display window | Untitled |
| linked | Zooms and moves this image together with any other “linked” images; see Linked Images | off |
When an argument is unchecked, its default is used, which is the first choice offered.
If another module is connected after Show, Show passes its input image to it unchanged. For the controls in Show's window, see Show – The Display Window.
All argument dialog boxes have a Help button (question-mark icon). Selecting it opens the instruction window for the module.