#!/bin/bash
#
# RunBundler.sh
#   copyright 2008 Noah Snavely
#
# A script for preparing a set of image for use with the Bundler 
# structure-from-motion system.
#
# Usage: RunBundler.sh [image_dir]
#
# The image_dir argument is the directory containing the input images.
# If image_dir is omitted, the current directory is used.
#

# Set this variable to your base install path (e.g., /home/foo/bundler)
BASE_PATH="TODO"

if [ $BASE_PATH == "TODO" ]
then
    echo "Please modify this script (RunBundler.sh) with the base path of your bundler installation.";
    exit;
fi

EXTRACT_FOCAL=$BASE_PATH/bin/extract_focal.pl

MATCHKEYS=$BASE_PATH/bin/KeyMatchFull
BUNDLER=$BASE_PATH/bin/bundler
SIFT=$BASE_PATH/bin/sift
TO_SIFT=$BASE_PATH/bin/ToSift.sh

IMAGE_DIR="."

if [ $# -eq 1 ]
then
    echo "Using directory '$1'"
    IMAGE_DIR=$1
fi

# Rename ".JPG" to ".jpg"
for d in `ls -1 $IMAGE_DIR | egrep ".JPG$"`
do 
    mv $IMAGE_DIR/$d $IMAGE_DIR/`echo $d | sed 's/\.JPG/\.jpg/'`
done

# Create the list of images
find $IMAGE_DIR -maxdepth 1 | egrep ".jpg$" | sort > list_tmp.txt
$EXTRACT_FOCAL list_tmp.txt
cp prepare/list.txt .

# Run the ToSift script to generate a list of SIFT commands
echo "[- Extracting keypoints -]"
rm -f sift.txt
$TO_SIFT $IMAGE_DIR > sift.txt 

# Execute the SIFT commands
sh sift.txt

# Match images (can take a while)
echo "[- Matching keypoints (this can take a while) -]"
sed 's/\.jpg$/\.key/' list_tmp.txt > list_keys.txt
$MATCHKEYS list_keys.txt matches.init.txt

# Generate the options file for running bundler 
mkdir bundle
rm -f options.txt

echo "--match_table matches.init.txt" >> options.txt
echo "--output bundle.out" >> options.txt
echo "--output_all bundle_" >> options.txt
echo "--output_dir bundle" >> options.txt
echo "--variable_focal_length" >> options.txt
echo "--use_focal_estimate" >> options.txt
echo "--constrain_focal" >> options.txt
echo "--constrain_focal_weight 0.0001" >> options.txt
echo "--estimate_distortion" >> options.txt
echo "--run_bundle" >> options.txt

# Run Bundler!
echo "[- Running Bundler -]"
rm -f constraints.txt
rm -f pairwise_scores.txt
$BUNDLER list.txt --options_file options.txt > bundle/out
