This is a set of OpenCV utilities that should make working with OpenCV a little easier. I forked this and added somethings for a class I taught in Spring 2018. You should probably use Adrian's library, link below.
Original Author: Adrian Rosebrock
Original Name: imutils
The preferred way to install is using pip:
pip install opencvutils
You will need both numpy and opencv3 for this to work. Use your os
package manager to install. Unfortunately this is not fast, numpy
install involves compiling things, so go grab a coffee or something
while you wait.
for macOS (please be aware, the brew people keep changing this!):
pip install numpy
brew install opencv
To submit git pulls, clone the repository and set it up as follows:
git clone https://github.com/walchko/opencvutils
cd opencvutils
pip install -e .
See the Jupyter Notebooks for examples of how to use this library. It contains a lot of common image manipulations.
You can make a video like this:
import cv2
from opencvutils.Camera import SaveVideo
shape = (240,320) # rows (height), cols (width)
sv = SaveVideo()
# you can change the default encoder using a four_cc
# string, but not all of them work!
# sv.encoder('H264')
# sv.encoder('MP4V')
# sv.encoder('x264')
sv.open(filename, shape[1], shape[0]) # order is backwards from opencv!!!
for i in range(100):
ret, img = camera.read() # grab image
sv.write(img)
sv.release()pi@raspberry ~ $ mjpeg_server.py -h
usage: mjpeg_server.py [-h] [-v] [-p PORT] [-c CAMERA] [-t TYPE]
[-s SIZE SIZE]
A simple mjpeg server Example: mjpeg-server -p 8080 --camera 4
optional arguments:
-h, --help show this help message and exit
-v, --version show program's version number and exit
-p PORT, --port PORT mjpeg publisher port, default is 9000
-c CAMERA, --camera CAMERA
set opencv camera number, ex. -c 1
-t TYPE, --type TYPE set camera type, either pi or cv, ex. -t pi
-s SIZE SIZE, --size SIZE SIZE
set size
Then you could do:
pi@raspberry ~ $ mjpeg_server.py -t pi -s 640 480
now navigate to your computer (hostname:9000) and you should see the
mjpg stream. Note, if you changed the port number with the -p arg,
then use that port number.
| Data | Version | Notes |
|---|---|---|
| 2018-07-19 | 0.9.4 | simple clean-up and updating some things |
| 2017-10-29 | 0.9.3 | bug fixes |
| 2017-04-09 | 0.9.0 | initial python 3 support |
| 2017-03-31 | 0.7.0 | refactored and got rid of things I don't need |
| 2017-01-29 | 0.6.0 | added video capture (video and images) program |
| 2016-12-30 | 0.5.3 | typo fix |
| 2016-12-30 | 0.5.1 | refactored |
| 2016-12-11 | 0.5.0 | published to PyPi |
Copyright (c) 2016 Kevin J. Walchko
Copyright (c) 2014 Adrian Rosebrock
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.