Merge pull request #1141 from samsalway/ssa-sequoia-tifs

Script to prepare TIFs captured by Parrot Sequoia

contrib/sequoia/README.md

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+# Prepare TIFs from Parrot Sequoia
+
+The Sequoia captures five images per shot, an RGB JPG and four single band TIFs, but only the JPG contains GPS Exif tags. To use the single-band TIFs for multispectral mapping/analysis it’s useful (not technically required) to have them also contain GPS Exif tags.
+
+This script will copy the GPS Exif tags from the RGB JPG file to the four TIFs of the same shot.
+
+## Requirements
+* [exiv2](https://www.exiv2.org/)
+
+## Usage
+Run the script from a directory of images captured by Sequoia.
+```
+./prepare-tifs.sh
+```

contrib/sequoia/prepare-tifs.sh

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+#!/bin/sh
+
+# Rename - remove timestamp
+for img in IMG_*.*; do
+	newname=`echo $img | sed -r "s/IMG_[0-9]+_[0-9]+_//"`
+	mv $img $newname
+done
+
+# Copy GPS Exif tags from *RGB.JPG to .TIF images
+for rgb in *_RGB.JPG; do
+	for band in GRE NIR RED REG; do
+		tif=`echo $rgb | sed s/_RGB.JPG/_$band.TIF/`
+		exiv2 -PEVk --grep GPS $rgb > $rgb.tags
+		exiv2 -m $rgb.tags $tif
+		rm $rgb.tags
+	done
+done
+
+# Move into subfolder per band
+for band in RGB GRE NIR RED REG; do
+	mkdir $band
+	mv *_$band.* $band/
+done