opencv
opencv-python と opencv-contrib-pythonが競合を起こすらしい． 解決策は，いったん両方をアンインストールしてから，再度 opencv-contrib-python のみをインストール． pip uninstall opencv-python pip uninstall opencv-contrib-python pip install open…
OpenCVで実装されているArucoに関するメモ．あくまでもPython．Versionは4.0.0.21テスト チュートリアルに書いてある内容＋α． dictionary(マーカのセット)は2種類1. predefined dictionary: あらかじめ用意されているマーカ2. custom dictionary: 自作するd…
[code lang='python']import cv2video = cv2.VideoCapture('input.mp4')num_frames = int(video.get(cv2.CAP_PROP_FRAME_COUNT))fps = video.get(cv2.CAP_PROP_FPS)width = int(video.get(cv2.CAP_PROP_FRAME_WIDTH))height = int(video.get(cv2.CAP_PROP_FR…
ArUco is a fiducial marker tracking method against occlusion published in Pattern Recognition in 2014. ArUco was integrated into OpenCV modules. This blog post is to know its definition, how-to-use, etc. for my works. ArUco provides three …
I was looking for a way to install OpenCV and OpenCV contrib for Python 3 with Anaconda. The following commands are what I found and succeeded to install but with pip not with Anaconda. pip install opencv-python pip install opencv-contrib-…
[code lang='python'] -- coding: utf-8 -- import os import numpy as np import glob import cv2 def generate_points_3d(rows, cols, square_size): """ prepare object points as ( 0, 0, 0), (1square_size, 0, 0), (2square_size, 0, 0), ... *1 img =…
This stackoverflow post gives us the answer!! OpenCV for python installed on Linux (Ubuntu) by anaconda outputs GTK+2.x related error as OpenCV Error: Unspecified error (The function is not implemented. Rebuild the library with Windows, GT…
See here. conda install -c anaconda opencv
OpenCV-Pythonチュートリアルの和訳を2.5年ぶりに更新． 和訳は以前と同じURLからアクセス可能です． ソースはgithubからgitlabに移行しました． 誤訳，変な訳があればgitlabにイシュー登録してもらえるとハッピーです．
OpenCV installation on Windows via Anaconda with conda -c conda-forge opencv makes import error like ImportError: DLL load failed: access denied. The solution is to use pip instead as pip install opencv-python.
With default CMakeLists.txt, we cannot compile OpenCV-Python with OpenCV 3.2.0 because 1. add_subdirectory() for python2 do not work appropriately 2. add_subdirectory() for python3 do not work appropriately 3. CMakeLists.txt in the root di…
OpenCV flags have a little bit different names when using with python. The name CV_FLAGNAME is set as cv2.FLAGNAME. For instance, CV_CALIB_CB_ADAPTIVE_THRESH is defined as cv2.CALIB_CB_ADAPTIVE_THRESH.
PYTHON2_EXECUTABLE: /opt/anaconda/anaconda2/bin/python2.7 PYTHON2_INCLUDE_DIR: /opt/anaconda/anaconda2/include PYTHON2_INCLUDE_DIR2: PYTHON2_LIBRARY: /opt/anaconda/anaconda2/lib/libpython2.7.so PYTHON2_LIBRARY_DEBUG: PYTHON2_NUMPY_INCLUDE…
cmakeのバージョンを3.1.3以上にする howto With QTのチェックを外す
Please use OpenCV 3.1.0 prebuilt binary provided at github, not at sourceforge. The one provided at sourceforge has some problem. Double clicking the exe file, I got an error message saying that can not open file "***/opencv-3.1.0.exe" as …
If PYTHON2_NUMPY_INCLUDE_DIRS is not found, python bindings for python2.7 is not generated. Couldn't compile with FFMPEG=ON. Turned off the flag. BUILD_opencv_python2=ON BUILD_opencv_python3=ON OPENCV_EXTRA_MODULES_PATH="CONTRIB_DIR/module…
OpenCV-Python always crashed when I used highgui related functions. With Spyder, we can see only kernel crash, so I had no idea what happened. When I ran a problem from terminal, I got an error message that This application failed to start…
OpenCV 3.1.0をPython 2.7から使うためのインストール手順 OpenCVのインストールはめんどくさいのでプレビルトライブラリを使う．opencv_contribの便利機能を使いたい場合は自前でコンパイルする必要がある． 前提条件: Anacondaを使ってPython2.7がインスト…
研究室の学生のためにOpenCV-Python Tutorialsの和訳を試みる．githubでチュートリアルのソース1式が公開されているので，このファイルを翻訳→内部ネットワークに公開という手順でいこう．
install anaconda install python packages download OpenCV 3.0.0 source compile OpenCV 3.0.0 with BUILD_opencv_python2 ON (BUILD_opencv_python3 may work with python 3 but I didn't try yet) With default settings, OpenCV package for python 2 i…
English notes is below the Japanese one. OpenCV 3.0.0をPython 2.7から使うためのインストール手順 Pythonのインストール Python-OpenCVを動かすには，Python本体に加えて少なくともNumPy, MatPlotLibのインストールが必要． 1.1. Anacondaのインストール…
OpenCV ver. 3.0 was released. I tried to compile OpenCV with VTK again and again and finally could compile it. The key was compile VTK with BUILD_SHARED_LIBS on compile OpenCV with VTK That's it!!
Intel TBB （Threading Building Blocks)のインストールMulti coreを使うためのライブラリ？Download/Stable versionのページから最新のバージョン(tbb30_20110315oss)を選ぶ．http://threadingbuildingblocks.org/file.php?fid=77該当するOSのファイル(tbb3…
致命的なバグを発見．mat = cvCreateMat(3, 3, CV_32F);mat =|0.0 1.0 2.0||3.0 4.0 5.0||6.0 7.0 8.0|とすると，行ベクトル，列ベクトルを取り出す関数はcvGetRowとcvGetColvec = cvCreateMat(1,3,CV_32F);として，実行すると，cvGetRow(mat, vec, 0) -> |0…
