panoramic cameras

Note

MicMac does not currently have an optical bar camera available, which means that it is not currently possible to process KH-4/A/B or KH-9 panoramic camera imagery using MicMac.

To process these images, you will need to install NASA’s Ames Stereo Pipeline (ASP), which can be used for further processing.

resampling using the frame

Unlike with the KH-9 Mapping Camera, for KH-4/A/B and KH-9 panoramic camera images, there are no réseau markers available to help resample the images. Instead, spymicmac.resample.crop_panoramic() can be used to first rotate the image based on the detected locations of either rail marks (for KH-4 images) or “wagon wheel” marks (for KH-9 PC images), though not all cameras will have these marks.

Then, the (rough) image border is detected, using spymicmac.image.get_rough_frame():

the image is then cropped to this border and, optionally, re-sampled to a smaller size:

In both cases, if the image is from the aft camera (as determined by the filename), then the image is rotated by 180° before being saved to the disk.

If you have a rough idea of where the image border is (using the left, right, top, and bottom coordinates), you can also use spymicmac.resample.crop_from_extent() to resample the image. This is especially useful for cases where one part of the image is over dark water, for example.

next steps

Once the images have been resampled, and you have done any desired radiometric pre-processing, you can follow the ASP Examples for the relevant image type in order to georeference the images and extract a DEM. spymicmac.asp has a number of functions available for generating the necessary files for ASP processing.