diff --git a/Dockerfile b/Dockerfile
index d2ad3aa..1755e7d 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -8,6 +8,7 @@ ENV DEBIAN_FRONTEND noninteractive
 RUN apt-get -y install unzip
 RUN apt-get -y install cmake
 RUN apt-get -y install g++
+RUN apt-get -y install git
 
 # set Kakadu distribution version and unique serial number 
 ARG KDU_SOURCE_NAME=v8_2_1-00462N
@@ -45,12 +46,29 @@ RUN apt-get install -y libvips-tools
 # install bc
 RUN apt-get -y install bc
 
-# Install dependencies:
+# Install python dependencies:
 WORKDIR /usr/src/iiif-htj2k/src
 RUN apt-get -y install python3-pip
 COPY ./src/requirements.txt ./
 RUN pip install -r ./requirements.txt
 
+# install openjpeg
+RUN apt-get -y install libopenjp2-tools
+
+# upgrade cmake
+RUN pip install --upgrade cmake
+# update G++ to version 10
+RUN apt-get -y install build-essential
+RUN apt install -y gcc-10 g++-10 cpp-10
+RUN update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-10 100 --slave /usr/bin/g++ g++ /usr/bin/g++-10
+# install grok
+WORKDIR /usr/src/
+RUN git clone https://github.com/GrokImageCompression/grok.git
+WORKDIR /usr/src/grok/build
+RUN cmake ..
+RUN make
+RUN make install
+
 # Copy the repo
 WORKDIR /usr/src/iiif-htj2k
 COPY --chmod=755 ./src ./src
diff --git a/convert/convert.sh b/convert/convert.sh
index 129279a..5faad98 100755
--- a/convert/convert.sh
+++ b/convert/convert.sh
@@ -22,14 +22,14 @@ format=$3
 logs_directory=$4
 echo "Input pattern: ${in_ptn}"
 
-number_of_encode_cycle_iterations=10
+number_of_encode_cycle_iterations=3
 
 # setup log files
 date_for_filename=`date +"%Y-%m-%d-%H-%M-%S_%N"`
 log_filename="$logs_directory/$format.${date_for_filename}.log.txt" 
 
 # write header to log file
-printf "input_filepath,input_filename,width,height,format," > $log_filename
+printf "input_filepath,input_filename,width,height,number_of_components,input_size_in_bytes,format," > $log_filename
 for encoding_cycle_iteration in $(seq 1 $number_of_encode_cycle_iterations); do
     printf "encode_time_in_seconds_iteration_%d," $encoding_cycle_iteration >> $log_filename 
 done
@@ -42,9 +42,11 @@ for in_path in $in_ptn/*.{tif,TIF}; do
     echo "Converting $in_fname to $format format..."
     width=$(vipsheader -f Xsize $in_path)
     height=$(vipsheader -f Ysize $in_path)
+    number_of_components=$(vipsheader -f bands $in_path)
+    uncompressed_file_bytes=$(du -sb ${in_path} | cut -f1) 
 
     # add initial log entries
-    printf "%s,%s,%s,%s,%s," $in_path $in_fname $width $height $format >> $log_filename
+    printf "%s,%s,%s,%s,%s,%s,%s," $in_path $in_fname $width $height $number_of_components $uncompressed_file_bytes $format >> $log_filename
 
     # start timer
     let duration_all_iterations_nanoseconds=0