Ophto

Repo for all information regarding the ophthalmoscope concept.

OpenCV (3.1.0) + Python2.7+ Bindings Installation & Setup Guide:

1- Update firmware \ remove unnecessary packages:-

sudo apt-get update
sudo apt-get purge wolfram* libreoffice*
sudo apt-get upgrade
sudo apt-get dist-upgrade
sudo rpi-update
sudo reboot

2- Download required OpenCV packages:-

Download essential & optimization libraries:-

sudo apt-get install build-essential cmake pkg-config
sudo apt-get install libjpeg8-dev libjasper-dev libpng12-dev
sudo apt-get install libgtk2.0-dev
sudo apt-get install libavcodec-dev libavformat-dev libswscale-dev libv4l-dev
sudo apt-get install libxvidcore-dev libx264-dev
sudo apt-get install libatlas-base-dev gfortran python2.7-dev
sudo apt-get install libgtkglext1 libgtkglext1-dev

Download/Install pip & numpy:-

cd ~
sudo wget https://bootstrap.pypa.io/get-pip.py
sudo python get-pip.py
sudo pip install numpy
sudo pip install --upgrade numpy

Download OpenCV (ver3.1.0) + extra modules:-

cd ~
sudo wget -O opencv.zip https://github.com/opencv/opencv/archive/3.1.0.zip
sudo unzip opencv.zip
sudo wget -O opencv_contrib.zip https://github.com/opencv/opencv_contrib/archive/3.1.0.zip
sudo unzip opencv_contrib.zip

3- Compile & build:-

TBB and OpenMP are enabled to improve FPS.

cd ~/opencv-3.1.0/
sudo mkdir build
cd build/
sudo cmake \
-D CMAKE_BUILD_TYPE=RELEASE \
-D BUILD_TBB=ON \
-D WITH_TBB=ON \
-D WITH_OPENMP=ON \
-D WITH_OPENGL=ON \
-D CMAKE_INSTALL_PREFIX=/usr/local \
-D INSTALL_C_EXAMPLES=OFF \
-D INSTALL_PYTHON_EXAMPLES=ON \
-D BUILD_EXAMPLES=ON \
-D OPENCV_EXTRA_MODULES_PATH=~/opencv_contrib-3.1.0/modules ..

Use 2 cores to insure proper installation and avoid build errors.

sudo make -j2
sudo make install
sudo ldconfig

3- Enable PiCam/Webcam multithreading (improve FPS) + add mirror effect:-

sudo pip install imutils

- Enable PiCam and test

enable the camera in the interfacing option (5)

sudo raspi-config

then test output after reboot

raspistill -o output.jpg

Mirror effect:-

$ sudo nano /usr/local/lib/python2.7/dist-packages/imutils/video/pivideostream.py

  class PiVideoStream:
          def __init__(self, resolution=(480, 368), framerate=32, vf=False, hf=False):
                  # initialize the camera and stream
                  self.camera = PiCamera()
                  self.camera.resolution = resolution
                  self.camera.framerate = framerate
                  self.camera.vflip = vf
                  self.camera.hflip = hf

When initializing use PiVideoStream(hf=True).start()

NOTE: Installation and setup can take from 75mins to 4hrs. Plan your time accordingly.