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I had asked this question on stackoverflow but now think this is a better place for it

I have python code to use OpenCV2 (3.10) to calculate the features of 2 images, match then and plot the most similar points. If I run the individual code it works and I can manually change the 2nd image file and the code will plot the matches, My problem is when I try to automate it to loop through a directory of images to compare to the 1st image I get the following error on Ubuntu 14.04, OpenCV 3.10 and Python 2.7

Besides the roughness of my code, anyone see why the loop errors out but the individual comparisons don't?

opencv/modules/core/src/stat.cpp:3749: error: (-215) type == src2.type() && src1.cols == src2.cols && (type == CV_32F || type == CV_8U) in function batchDistance

Individual Code Will match without triggering the error for every test image I supply by manually editing the 2nd image filepath value.

import sys
import cv2
import os
import numpy as np
from matplotlib import pyplot as plt

#Load the crest and create a grey version
crest = cv2.imread('Crest.png')
greyCrest = cv2.cvtColor(crest,cv2.COLOR_BGR2GRAY)

#Create the ORB Object and BruteForce
orb=cv2.ORB_create()
#Use Hamming Distance as its ORD (other algorithms would use a different distance measure)
BruteForceMatch = cv2.BFMatcher(cv2.NORM_HAMMING,crossCheck=True)
#Calculate the keypoints and descriptors for the crest
Crestkeypoints,Crestdescriptor = orb.detectAndCompute(greyCrest,None)

#
testimage = cv2.imread('OtherImage.jpg')
testkeypoints, testdescriptors = orb.detectAndCompute(testimage,None)

#Basic Idea
matches = BruteForceMatch.match(Crestdescriptor,testdescriptors)
#Sort the matches so the strongest are at the top
matches = sorted(matches, key = lambda x:x.distance)
Title = "Total Matched " + str(len(matches)) +" Plotting Top 40"
#display the top 40 matches on the plot
MatchImage = cv2.drawMatches(greyCrest,Crestkeypoints,testimage,testkeypoints,matches[:40],testimage,flags=2)
#This gets rid of the blue tint to the end image when plotting OpenCV image in Matplotlib because of the RGB ,BGR difference
plt.imshow(cv2.cvtColor(MatchImage, cv2.COLOR_BGR2RGB))
plt.title(Title)
plt.show()
#Pause for 10 Seconds so you can see the plot
plt.pause(10)
#Have to close as for some reason the figures weren't plotting correctly when I ran the code the 2nd time
plt.close('all')

Looping Code

Below is code to loop through a directory, load the image into OpenCV, calculate the keypoints and features of the image and compare it to a search image before getting the number of matches and plotting the top 40 matches

#Load the crest and create a grey version
import cv2
import os
import numpy as np
from matplotlib import pyplot as plt
    crest = cv2.imread('Crest.png')
    greyCrest = cv2.cvtColor(crest,cv2.COLOR_BGR2GRAY)

    #Create the ORB Object and BruteForce
    orb2=cv2.ORB_create()
    #Use Hamming Distance as its ORD (other algorithms would use a different distance measure)
    BruteForceMatch = cv2.BFMatcher(cv2.NORM_HAMMING,crossCheck=True)
    #Calculate the keypoints and descriptors for the crest
    Crestkeypoints,Crestdescriptor = orb2.detectAndCompute ...

I have amended a script from https://github.com/jayrambhia/Install... to try to install 2.4.13 onto a vm running 14.04 where I have sudo permissions. I'm new to openCV so any help getting this script to work would be appreciated as I have to deploy 20 vm's with OpenCV

After a few minutes of running the script returns with an error saying can't

/bin/sh: 1: cd: can't cd to /home/myaccount/setups/OpenCV/opencv-2.4.13/build

and

make[2]: *** [3rdparty/libtiff/CMakeFiles/libtiff.dir/depend] Error 2
make[1]: *** [3rdparty/libtiff/CMakeFiles/libtiff.dir/all] Error 2

The last few lines of the output is included below and the script is before that.

Any ideas why the script wont complete successfully as I need to install OpenCV on many vms

Install Script

arch=$(uname -m)
if [ "$arch" == "i686" -o "$arch" == "i386" -o "$arch" == "i486" -o "$arch" == "i586" ]; then
flag=1
else  
flag=0
fi
echo "Installing OpenCV 2.4.13"
mkdir OpenCV
cd OpenCV
echo "Removing any pre-installed ffmpeg and x264"
sudo apt-get -y remove ffmpeg x264 libx264-dev
echo "Installing unzip"
sudo apt-get -y install unzip
echo "Installing Dependenices"
sudo apt-get -y install libopencv-dev
sudo apt-get -y install build-essential checkinstall cmake pkg-config yasm
sudo apt-get -y install libtiff4-dev libjpeg-dev libjasper-dev
sudo apt-get -y install libavcodec-dev libavformat-dev libswscale-dev libdc1394-22-dev libxine-dev libgstreamer0.10-dev libgstreamer-plugins-base0.10-dev libv4l-dev
sudo apt-get -y install python-dev python-numpy
sudo apt-get -y install libtbb-dev libeigen3-dev
sudo apt-get -y install libqt4-dev libgtk2.0-dev
sudo apt-get -y install libfaac-dev libmp3lame-dev libopencore-amrnb-dev libopencore-amrwb-dev libtheora-dev libvorbis-dev libxvidcore-core-dev
sudo apt-get -y install x264 v4l-utils ffmpeg
sudo apt-get -y install libgtk2.0-dev
echo "Downloading OpenCV 2.4.13"
if ! [ -f "OpenCV-2.4.13.zip" ]; then
  wget -O OpenCV-2.4.13.zip http://sourceforge.net/projects/opencvlibrary/files/opencv-unix/2.4.13/opencv-2.4.13.zip/download
fi
echo "Installing OpenCV 2.4.13"
if ! [ -d "opencv-2.4.13" ]; then
  unzip OpenCV-2.4.13.zip
fi
rm OpenCV-2.4.13.zip
cd opencv-2.4.13
rm -rf build
mkdir build
cd build
cmake -D CUDA_ARCH_BIN=3.2 -D CUDA_ARCH_PTX=3.2 -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=/usr/local -D WITH_TBB=ON -D BUILD_NEW_PYTHON_SUPPORT=ON -D WITH_V4L=ON -D BUILD_TIFF=ON -D WITH_QT=ON -D WITH_OPENGL=ON ..
make -j$(nproc)
sudo make install
sudo sh -c 'echo "/usr/local/lib" > /etc/ld.so.conf.d/opencv.conf'
sudo ldconfig
echo "OpenCV 2.4.13 ready to be used"

Command Output

[100%] Build Java tests
Buildfile: /home/myaccount/setups/OpenCV/opencv-2.4.13/build/modules/java/test/.build/build.xml

build:

compile:
    [mkdir] Created dir: /home/myaccount/setups/OpenCV/opencv-2.4.13/build/modules/java/test/.build/build/classes
    [javac] Compiling 104 source files to /home/myaccount/setups/OpenCV/opencv-2.4.13/build/modules/java/test/.build/build/classes

jar:
    [mkdir] Created dir: /home/myaccount/setups/OpenCV/opencv-2.4.13/build/modules/java/test/.build/build/jar
      [jar] Building jar: /home/myaccount/setups/OpenCV/opencv-2.4.13/build ...