Normalized Cross-Correlation Evaluation
This page describes the methodology for using normalized cross-correlation to evaluate a region of the model.
Cross-correlation is performed on the following images:
- Model: Image of bigmap
- Truth: Image of Zmaps
Model (left), Truth (right), S/C Azimuth 0, Zenith 30deg, Sun Azimuth 90deg, Zenith 45deg:
Images are generated using the following set of dirty sumfiles at the required resolution to include:
- low and high phase
- low and moderate incidence
- full set of s/c azimuth angles (observe region from all directions).
Spacecraft |
Sun |
||
Azimuth (deg) |
Zenith (deg) |
Azimuth (deg) |
Zenith (deg) |
0 |
30 |
90 |
45 |
90 |
30 |
90 |
45 |
180 |
30 |
90 |
45 |
270 |
30 |
90 |
45 |
0 |
30 |
270 |
45 |
90 |
30 |
270 |
45 |
180 |
30 |
270 |
45 |
270 |
30 |
270 |
45 |
45 |
10 |
270 |
10 |
Images resolution is chosen from the following based on the state of the model:
- Resolution: 120cm, 75cm, 35cm, 18cm, 9cm, 5cm.
The following regions have been identified for evaluation:
Region ID |
Region Name |
Latitude (deg) |
West Longitude (deg) |
Description |
TG |
TAG Site 1 |
-10 |
350 |
Shape 4 TAG site 1 |
R1 |
Region 1 |
45 |
300 |
Region of roughness, identified from a visual inspection using Small Body Mapping Tool |
Where are the Dirty Sumfiles and Truth Images?
SUMFILES: ormacsrv1:/opt/local/spc/shape4/imageGen/DIRTYSUMFILES/
Truth .pgm files: ormacsrv1:/opt/local/spc/shape4/imageGen/PGMFILES/
Follow this link for details of the image file and bigmap naming conventions: Normalized Cross-Correlation Evaluation - Naming Conventions
Obtain Model Bigmap
Obtain the required bigmap/s from the model working directory (or back-up). A full set of bigmap .in files is stored here:
/opt/local/spc/shape4/support4/ MR1051_model_REG1_GSD5cm_width100m.in MR1052_model_REG1_GSD5cm_width20m.in MR1055_model_REG1_GSD5cm_width50m.in MR1101_model_REG1_GSD10cm_width100m.in MR1102_model_REG1_GSD10cm_width20m.in MR1105_model_REG1_GSD10cm_width50m.in MR1351_model_REG1_GSD35cm_width100m.in MR1352_model_REG1_GSD35cm_width20m.in MR1355_model_REG1_GSD35cm_width50m.in MTG051_model_TAG1_GSD5cm_width100m.in MTG052_model_TAG1_GSD5cm_width20m.in MTG055_model_TAG1_GSD5cm_width50m.in MTG101_model_TAG1_GSD10cm_width100m.in MTG102_model_TAG1_GSD10cm_width20m.in MTG105_model_TAG1_GSD10cm_width50m.in MTG351_model_TAG1_GSD35cm_width100m.in MTG352_model_TAG1_GSD35cm_width20m.in MTG355_model_TAG1_GSD35cm_width50m.in
Populate Evaluation Directory
The F6 evaluation directory is here:
cd /Volumes/Data1/spc-test/F6-evaluation/ drwxrwxr-x 173 dlambert OREX\spc 5882 Jul 20 16:06 DIRTYNOMINALS drwxrwxr-x 173 dlambert OREX\spc 5882 Jul 20 16:05 DIRTYSUMFILES drwxrwxr-x 172 dlambert OREX\spc 5848 Jul 20 16:17 SUMFILES drwxr-xr-x 14 jweirich OREX\spc 476 Jul 21 09:29 eval_F6_BBD1_TG drwxrwxr-x 14 dlambert OREX\spc 476 Jul 20 16:36 eval_F6_start -rw-r--r-- 1 dlambert OREX\spc 117 Jul 20 16:21 listSUM_120cm -rw-r--r-- 1 dlambert OREX\spc 117 Jul 20 16:22 listSUM_18cm -rw-r--r-- 1 dlambert OREX\spc 117 Jul 20 16:21 listSUM_35cm -rw-r--r-- 1 dlambert OREX\spc 117 Jul 20 16:22 listSUM_5cm -rw-r--r-- 1 dlambert OREX\spc 117 Jul 20 16:21 listSUM_75cm -rw-r--r-- 1 dlambert OREX\spc 117 Jul 20 16:22 listSUM_9cm drwxrwxr-x 4 dlambert OREX\spc 136 Jun 24 16:16 lsupport -rw-rw-r-- 1 dlambert OREX\spc 1927 Jun 23 15:12 processing.log lrwxr-xr-x 1 dlambert OREX\spc 30 Jun 24 12:27 support -> /opt/local/spc/shape4/support4 lrwxr-xr-x 1 dlambert OREX\spc 39 Jun 24 16:54 truth_PGMFILES -> /opt/local/spc/shape4/imageGen/PGMFILES
Make a subdirectory, e.g.
mkdir eval_F6_start
Populate the directory as follows:
listSUM -> ../listSUM_35cm - symbolic link to list of dirty sumfiles;
lsupport -> ../lsupport/ - symbolic link to main directory local support directory;
MAPFILES/ - directory containing model bigmap/s;
MAPLIST.TXT - file listing the bigmap to image, appended with 'END';
PGMFILES/ - directory for storage of generated .pgm files;
SUMFILES -> ../SUMFILES - symbolic link to main directory dirty sumfiles;
THUMBNAILS/ - directory for storage of generated .jpg files;
imageXcorr_results/ - directory for storage of imXcor.py output files;
truth_PGMFILES -> /opt/local/spc/shape4/imageGen/PGMFILES/ - symbolic link to truth images.
mkdir MAPFILES PGMFILES THUMBNAILS imageXcorr_results ln -s ../lsupport . ln -s ../SUMFILES . ln -s /opt/local/spc/shape4/imageGen/PGMFILES truth_PGMFILES ln -s ../listSUM_35cm listSUM printf "%s\n%s\n" "MTG105" "END" > MAPLIST.TXT
Generate Model Images
The following script has been written to automate the generation of images of a bigmap using imager_MG. It expects the user to identify an existing list of dirty sumfiles as a common line item, e.g.:
sh lsupport/makeImages_imagerMG.sh listSUM
where
cat listSUM PBF6TG3E0001 PBF6TG3E0002 PBF6TG3E0003 PBF6TG3E0004 PBF6TG3E0005 PBF6TG3E0006 PBF6TG3E0007 PBF6TG3E0008 PBF6TG3E0009
Generate thumbnails for visual inspection of the bigmap images:
while read name; do
echo $name
/opt/local/bin/convert PGMFILES/${name}_MTG105.pgm THUMBNAILS/${name}_MTG105.jpg
done < listSUM