PyOpenCV | Python OpenCV Samples | Computer Vision library
kandi X-RAY | PyOpenCV Summary
kandi X-RAY | PyOpenCV Summary
Python + OpenCV Samples.
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Top functions reviewed by kandi - BETA
- Detect images using haar cascade .
PyOpenCV Key Features
PyOpenCV Examples and Code Snippets
Community Discussions
Trending Discussions on PyOpenCV
QUESTION
I have a tarball containing tiff files. I am trying to read them without extracting and saving them. Here is what I have:
...ANSWER
Answered 2018-Dec-11 at 16:55I think you get a "bytes object" if you do a read()
on the result of tar.extract file()
. Then you can convert that to a Numpy ndarray
and use OpenCV imdecode()
to unpack the TIF format from the memory buffer into an image.
This code works for me - though I seem to alternate between reading 266 byte useless files and TIF images from my tarfile - I don't know why that is but if you don't get them, you can just remove the if
statement that checks for useless 266 byte files!
QUESTION
I installed pyOpenCV on my raspberry pi using the pre-built binary from here. It doesn't seem to work at all. I wrote this little script to test:
...ANSWER
Answered 2018-Jul-16 at 10:40Build OpenCV from scratch gives your more control over the choice of modules like CUDA version or which BLAS library to use.
It could be quite troublesome and slow to build OpenCV on a Raspberry Pi, I believe. Therefore I would suggest trying pre-built packages through channels like sudo apt-get install python-opencv
or pip. You can test them pretty quickly and they are easy to be removed even if they don't work.
If you really wanted to build from scratch, the site that you have mentioned should work. If you don't want virtual environment, just skip all the steps that involves virtual environment. Installation commands that work inside a virtual environment should work outside it too.
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Install PyOpenCV
You can use PyOpenCV like any standard Python library. You will need to make sure that you have a development environment consisting of a Python distribution including header files, a compiler, pip, and git installed. Make sure that your pip, setuptools, and wheel are up to date. When using pip it is generally recommended to install packages in a virtual environment to avoid changes to the system.
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