media-libs/opencv Package Details

OpenCV (Open Source Computer Vision) is a library of programming functions mainly aimed at real time computer vision. Example applications of the OpenCV library are Human-Computer Interaction (HCI); Object Identification, Segmentation and Recognition; Face Recognition; Gesture Recognition; Motion Tracking, Ego Motion, Motion Understanding; Structure From Motion (SFM); and Mobile Robotics.

v4.10.0 :: 0/4.10.0 :: gentoo

Modified: Friday 06 December 07:56
License: Apache-2.0
Keywords: ~amd64 ~arm ~arm64 ~loong ~ppc ~ppc64 ~riscv ~x86
USE flags: atlas avif contrib contribcvv contribdnn contribfreetype contribhdf contribovis contribsfm contribxfeatures2d cuda cudnn debug dnnsamples doc eigen examples features2d ffmpeg gdal gflags glog gphoto2 gstreamer gtk3 ieee1394 jasper java jpeg jpeg2k lapack mkl non-free opencl opencvapps openexr opengl openmp png python qt6 quirc tbb tesseract test testprograms tiff truetype v4l vaapi vtk webp xine

v4.9.0-r2 :: 0/4.9.0 :: gentoo

Modified: Friday 06 December 07:56
License: Apache-2.0
Keywords: amd64 arm64 x86 ~arm ~loong ~ppc ~ppc64 ~riscv
USE flags: atlas contrib contribcvv contribdnn contribfreetype contribhdf contribovis contribsfm contribxfeatures2d cuda cudnn debug dnnsamples doc eigen examples features2d ffmpeg gdal gflags glog gphoto2 gstreamer gtk3 ieee1394 jasper java jpeg jpeg2k lapack mkl non-free opencl opencvapps openexr opengl openmp png python qt5 qt6 quirc tbb tesseract test testprograms tiff v4l vaapi vtk webp xine

General

atlas: Use sci-libs/atlas for blas, lapack and sparse blas routines
avif: Add AV1 Image Format (AVIF) support
contrib: Install user contributed scripts from opencv_contrib (Experimental!)
contribcvv: Enable CVV in contrib (requires Qt5)
contribdnn: Enable DNN module contrib (requires tinydnn)
contribfreetype: Enable Drawing UTF-8 strings with media-libs/freetype&media-libs/harfbuzz
contribhdf: Enable HDF module (requires sci-libs/hdf5)
contribovis: Enable OGRE vision module support (dev-games/ogre)
contribsfm: Enable SFM module (requires USE="eigen gflags glog")
contribxfeatures2d: Enables xfeatures2d and autodownload of samples in contrib
cuda: Enable NVIDIA Cuda computations support (Experimental!)
cudnn: Enable support for nVidia cuDNN library
debug: Enable extra debug codepaths, like asserts and extra output. If you want to get meaningful backtraces see https://wiki.gentoo.org/wiki/Project:Quality_Assurance/Backtraces
dnnsamples: Enable dnn caffeemodel samples
doc: Add extra documentation (API, Javadoc, etc). It is recommended to enable per package instead of globally
eigen: Enable usage of dev-cpp/eigen for computations
examples: Install examples, usually source code
features2d: Enable features2d module
ffmpeg: Enable ffmpeg/libav-based audio/video codec support
gdal: Enable support for sci-libs/gdal library
gflags: Use Google's C++ argument parsing library (dev-cpp/gflags)
glog: Use Google's C++ logging library (dev-cpp/glog)
gphoto2: Add digital camera support
gstreamer: Add support for media-libs/gstreamer (Streaming media)
gtk3: Enable x11-libs/gtk+:3 support
ieee1394: Enable FireWire/iLink IEEE1394 support (dv, camera, ...)
jasper: Use media-libs/jasper for jpeg2k support
java: Add support for Java
jpeg: Add JPEG image support
jpeg2k: Support for JPEG 2000, a wavelet-based image compression format
lapack: Add support for the virtual/lapack numerical library
mkl: Use sci-libs/mkl for blas, lapack and sparse blas routines
non-free: Enable non-free components
opencl: Enable OpenCL support (computation on GPU)
opencvapps: Enable compilation with opencvapps
openexr: Support for the OpenEXR graphics file format
opengl: Add support for OpenGL (3D graphics)
openmp: Build support for the OpenMP (support parallel computing), requires >=sys-devel/gcc-4.2 built with USE="openmp"
png: Add support for libpng (PNG images)
python: Add optional support/bindings for the Python language
python: Add optional support/bindings for the Python language
qt5: Add support for the Qt 5 application and UI framework
qt6: Add support for the Qt 6 application and UI framework
quirc: Enable qrcode decoding via media-libs/quirc
tbb: Enable multithreading with the Intel Threads Building Block (dev-cpp/tbb)
tesseract: Use Google's OCR Engine
test: Enable dependencies and/or preparations necessary to run tests (usually controlled by FEATURES=test but can be toggled independently)
testprograms: Build and install programs for testing OpenCV (performance)
tiff: Add support for the TIFF image format
truetype: Enable media-libs/freetype support for gapi module
v4l: Enable support for video4linux (using linux-headers or userspace libv4l libraries)
vaapi: Enable Video Acceleration API for hardware decoding
vtk: Build new 3D visualization module viz based on sci-libs/vtk
webp: Add support for the WebP image format
xine: Add support for the XINE movie libraries

abi_mips

n32: 64-bit (32-bit pointer) libraries
n64: 64-bit libraries
o32: 32-bit libraries

abi_s390

32: 32-bit (s390) libraries
64: 64-bit (s390x) libraries

abi_x86

32: 32-bit (x86) libraries
64: 64-bit (amd64) libraries
x32: x32 ABI libraries

cpu_flags_arm

asimddp: Use the Advanced SIMD dot product instructions
neon: Use the NEON (ASIMD) instruction set
vfpv3: Use the VFP version 3 instruction set

cpu_flags_ppc

vsx: Use the Vector Scalar Extension instruction set (POWER7 and later)
vsx3: Use the Vector Scalar Extension v.3 instruction set (POWER9 and later)

cpu_flags_x86

avx: Adds support for Advanced Vector Extensions instructions
avx2: Adds support for Advanced Vector Extensions 2 instructions
avx512_4fmaps: Use AVX-512 Fused Multiply-Accumulate Packed Single Precision instruction set
avx512_4vnniw: Use AVX-512 Vector Neural Network Instructions Word Variable Precision
avx512_bitalg: Use AVX-512 Bit Algorithms instruction set
avx512_vbmi2: Use AVX-512 Vector Bit Manipulation Instructions 2
avx512_vnni: Use vector neural network instructions for 8- and 16-bit multiply-add operations
avx512_vpopcntdq: Use AVX-512 Vector Population Count Doubleword and Quadword instruction set
avx512bw: Use AVX-512 byte- and word instructions
avx512cd: Use AVX-512 conflict detection instructions
avx512dq: Use AVX-512 double- and quad-word instructions
avx512er: Use AVX-512 exponential and reciprocal instructions
avx512f: Adds support for AVX-512 Foundation instructions
avx512ifma: Use AVX-512 Integer Fused Multiply-Add instruction set
avx512pf: Use AVX-512 prefetch instructions
avx512vbmi: Use AVX-512 vector byte manipulation instructions
avx512vl: Use AVX-512 vector-length instructions
f16c: Adds support for F16C instruction set for converting between half-precision and single-precision floats
fma3: Use the Fused Multiply Add 3 instruction set ([fma] in cpuinfo)
popcnt: Enable popcnt instruction support ([abm] or [popcnt] in cpuinfo)
sse: Use the SSE instruction set
sse2: Use the SSE2 instruction set
sse3: Use the SSE3 instruction set ([pni] in cpuinfo, NOT ssse3)
sse4_1: Enable SSE4.1 instruction support
sse4_2: Enable SSE4.2 instruction support
ssse3: Use the SSSE3 instruction set (NOT sse3/pni)

python_targets

python3_10: Build with Python 3.10
python3_11: Build with Python 3.11
python3_12: Build with Python 3.12
python3_13: Build with Python 3.13

video_cards

intel: Enable Video Acceleration API for hardware decoding for Intel cards

app-arch / bzip2 : A high-quality data compressor used extensively by Gentoo Linux

app-text / tesseract : An OCR Engine, originally developed at HP, now open source

dev-cpp / abseil-cpp : Abseil Common Libraries (C++), LTS Branch

dev-cpp / eigen : C++ template library for linear algebra

dev-cpp / gflags : Google's C++ argument parsing library

dev-cpp / glog : Google Logging library

dev-cpp / tbb : High level abstract threading library

dev-games / ogre : Object-oriented Graphics Rendering Engine

dev-java / java-config : Java environment configuration query tool

dev-lang / python : Freethreading (no-GIL) version of Python programming language

dev-libs / cudnn : NVIDIA Accelerated Deep Learning on GPU library

dev-libs / flatbuffers : Memory efficient serialization library

dev-libs / glib : The GLib library of C routines

dev-libs / imath : Imath basic math package

dev-libs / protobuf : Google's Protocol Buffers - Extensible mechanism for serializing structured data

dev-python / numpy : Fast array and numerical python library

dev-qt / qtbase : Cross-platform application development framework

dev-qt / qtconcurrent : Multi-threading concurrence support library for the Qt5 framework

dev-qt / qtgui : The GUI module and platform plugins for the Qt5 framework

dev-qt / qtopengl : OpenGL support library for the Qt5 framework (deprecated)

dev-qt / qttest : Unit testing library for the Qt5 framework

dev-qt / qtwidgets : Set of components for creating classic desktop-style UIs for the Qt5 framework

dev-util / nvidia-cuda-toolkit : NVIDIA CUDA Toolkit (compiler and friends)

dev-util / opencl-headers : Unified C language headers for the OpenCL API

media-libs / freetype : High-quality and portable font engine

media-libs / gst-plugins-base : Basepack of plugins for gstreamer

media-libs / gstreamer : Open source multimedia framework

media-libs / harfbuzz : An OpenType text shaping engine

media-libs / jasper : Implementation of the codec specified in the JPEG-2000 Part-1 standard

media-libs / libavif : Library for encoding and decoding .avif files

media-libs / libdc1394 : Library to interface with IEEE 1394 cameras following the IIDC specification

media-libs / libgphoto2 : Library that implements support for numerous digital cameras

media-libs / libjpeg-turbo : MMX, SSE, and SSE2 SIMD accelerated JPEG library

media-libs / libpng : Portable Network Graphics library

media-libs / libv4l : v4l-utils libraries and optional utilities

media-libs / libva : Video Acceleration (VA) API for Linux

media-libs / libwebp : A lossy image compression format

media-libs / openexr : ILM's OpenEXR high dynamic-range image file format libraries

media-libs / openjpeg : Open-source JPEG 2000 library

media-libs / quirc : QR decoder library

media-libs / tiff : Tag Image File Format (TIFF) library

media-libs / xine-lib : Core libraries for Xine movie player

media-plugins / gst-plugins-aom : Alliance for Open Media AV1 plugin for GStreamer

media-plugins / gst-plugins-jpeg : JPEG image encoder/decoder plugin for GStreamer

media-plugins / gst-plugins-libav : FFmpeg based gstreamer plugin

media-plugins / gst-plugins-mpeg2dec : MPEG2 decoder plugin for GStreamer

media-plugins / gst-plugins-mpeg2enc : MPEG-1/2 video encoding plugin for GStreamer

media-plugins / gst-plugins-mpg123 : MP3 decoder plugin for GStreamer

media-plugins / gst-plugins-openh264 : H.264 encoder/decoder plugin for GStreamer

media-plugins / gst-plugins-vpx : VP8/VP9 video encoder/decoder plugin for GStreamer

media-plugins / gst-plugins-x264 : H.264 encoder plugin for GStreamer

media-video / ffmpeg : Complete solution to record/convert/stream audio and video. Includes libavcodec

sci-libs / atlas : Automatically Tuned Linear Algebra Software

sci-libs / gdal : Translator library for raster geospatial data formats (includes OGR support)

sci-libs / hdf5 : General purpose library and file format for storing scientific data

sci-libs / mkl : Intel Math Kernel Library

sci-libs / opencascade : Development platform for CAD/CAE, 3D surface/solid modeling and data exchange

sci-libs / vtk : The Visualization Toolkit

sys-libs / libraw1394 : Library that provides direct access to the IEEE 1394 bus

sys-libs / zlib : Standard (de)compression library

virtual / cblas : Virtual for BLAS C implementation

virtual / glu : Virtual for OpenGL utility library

virtual / jdk : Virtual for Java Development Kit (JDK)

virtual / jre : Virtual for Java Runtime Environment (JRE)

virtual / lapack : Virtual for Linear Algebra Package FORTRAN 77 (LAPACK) implementation

virtual / lapacke : Virtual for LAPACK C implementation

virtual / opencl : Virtual for OpenCL API

virtual / opengl : Virtual for OpenGL implementation

x11-libs / gtk+ : Gimp ToolKit +