Face and Eye detection using Opencv On Rustlang

main.rs

use opencv::{
    Result,
    prelude::*,
    objdetect,
    highgui,
    imgproc,
    core,
    types,
    videoio,
};
fn main()->Result<()>{
    let mut camera = videoio::VideoCapture::new(0, videoio::CAP_ANY)?;
    // Use the following command to find the actual location of your xml files
    //sudo find / -name haarcascade_frontalface_default.xml
    //Haarcascade for eye detection
    //let xml = "/usr/local/share/opencv4/haarcascades/haarcascade_eye.xml";
    //Haarcascade for face detection
    let xml = "/usr/local/share/opencv4/haarcascades/haarcascade_frontalface_default.xml";  
    let mut face_detector = objdetect::CascadeClassifier::new(xml)?;
    let mut img = Mat::default();
    loop{
        camera.read(&mut img)?;
        let mut gray = Mat::default();
        imgproc::cvt_color(&img, &mut gray, imgproc::COLOR_BGR2GRAY, 0)?;
        let mut faces = types::VectorOfRect::new();
        face_detector.detect_multi_scale(
            &gray, 
            &mut faces, 
            1.1, 
            10,
            objdetect::CASCADE_SCALE_IMAGE,
            core::Size::new(10, 10),
            core::Size::new(0, 0)
        )?;
        println!("{:?}", faces);
        if faces.len() > 0{
            for face in faces.iter(){
                imgproc::rectangle(
                    &mut img,
                    face,
                    core::Scalar::new(0f64, 255f64, 0f64, 0f64),
                    2,
                    imgproc::LINE_8,
                    0
                )?;
            }    
        }
        highgui::imshow("gray", &img)?;
        highgui::wait_key(1)?;
    }
    Ok(())
}

Hi Rajesh, whenever I try to run cargo run I got an error while installing opencv, any idea why it is happening
error: failed to run custom build command for opencv v0.62.0

Caused by:
process didn't exit successfully: /home/husnain/Programming/open-cv-experiment/opencv-face-detector/target/debug/build/opencv-296215c7747d2549/build-script-build (exit status: 1)
--- stdout
cargo:rerun-if-env-changed=OPENCV4_NO_PKG_CONFIG
cargo:rerun-if-env-changed=PKG_CONFIG_x86_64-unknown-linux-gnu
cargo:rerun-if-env-changed=PKG_CONFIG_x86_64_unknown_linux_gnu
cargo:rerun-if-env-changed=HOST_PKG_CONFIG
cargo:rerun-if-env-changed=PKG_CONFIG
cargo:rerun-if-env-changed=OPENCV4_STATIC
cargo:rerun-if-env-changed=OPENCV4_DYNAMIC
cargo:rerun-if-env-changed=PKG_CONFIG_ALL_STATIC
cargo:rerun-if-env-changed=PKG_CONFIG_ALL_DYNAMIC
cargo:rerun-if-env-changed=PKG_CONFIG_PATH_x86_64-unknown-linux-gnu
cargo:rerun-if-env-changed=PKG_CONFIG_PATH_x86_64_unknown_linux_gnu
cargo:rerun-if-env-changed=HOST_PKG_CONFIG_PATH
cargo:rerun-if-env-changed=PKG_CONFIG_PATH
cargo:rerun-if-env-changed=PKG_CONFIG_LIBDIR_x86_64-unknown-linux-gnu
cargo:rerun-if-env-changed=PKG_CONFIG_LIBDIR_x86_64_unknown_linux_gnu
cargo:rerun-if-env-changed=HOST_PKG_CONFIG_LIBDIR
cargo:rerun-if-env-changed=PKG_CONFIG_LIBDIR
cargo:rerun-if-env-changed=PKG_CONFIG_SYSROOT_DIR_x86_64-unknown-linux-gnu
cargo:rerun-if-env-changed=PKG_CONFIG_SYSROOT_DIR_x86_64_unknown_linux_gnu
cargo:rerun-if-env-changed=HOST_PKG_CONFIG_SYSROOT_DIR
cargo:rerun-if-env-changed=PKG_CONFIG_SYSROOT_DIR
cargo:rerun-if-env-changed=OPENCV_NO_PKG_CONFIG
cargo:rerun-if-env-changed=PKG_CONFIG_x86_64-unknown-linux-gnu
cargo:rerun-if-env-changed=PKG_CONFIG_x86_64_unknown_linux_gnu
cargo:rerun-if-env-changed=HOST_PKG_CONFIG
cargo:rerun-if-env-changed=PKG_CONFIG
cargo:rerun-if-env-changed=OPENCV_STATIC
cargo:rerun-if-env-changed=OPENCV_DYNAMIC
cargo:rerun-if-env-changed=PKG_CONFIG_ALL_STATIC
cargo:rerun-if-env-changed=PKG_CONFIG_ALL_DYNAMIC
cargo:rerun-if-env-changed=PKG_CONFIG_PATH_x86_64-unknown-linux-gnu
cargo:rerun-if-env-changed=PKG_CONFIG_PATH_x86_64_unknown_linux_gnu
cargo:rerun-if-env-changed=HOST_PKG_CONFIG_PATH
cargo:rerun-if-env-changed=PKG_CONFIG_PATH
cargo:rerun-if-env-changed=PKG_CONFIG_LIBDIR_x86_64-unknown-linux-gnu
cargo:rerun-if-env-changed=PKG_CONFIG_LIBDIR_x86_64_unknown_linux_gnu
cargo:rerun-if-env-changed=HOST_PKG_CONFIG_LIBDIR
cargo:rerun-if-env-changed=PKG_CONFIG_LIBDIR
cargo:rerun-if-env-changed=PKG_CONFIG_SYSROOT_DIR_x86_64-unknown-linux-gnu
cargo:rerun-if-env-changed=PKG_CONFIG_SYSROOT_DIR_x86_64_unknown_linux_gnu
cargo:rerun-if-env-changed=HOST_PKG_CONFIG_SYSROOT_DIR
cargo:rerun-if-env-changed=PKG_CONFIG_SYSROOT_DIR

--- stderr
=== Crate version: Some("0.62.0")
=== Environment configuration:
=== OPENCV_PACKAGE_NAME = None
=== OPENCV_PKGCONFIG_NAME = None
=== OPENCV_CMAKE_NAME = None
=== OPENCV_CMAKE_BIN = None
=== OPENCV_VCPKG_NAME = None
=== OPENCV_LINK_LIBS = None
=== OPENCV_LINK_PATHS = None
=== OPENCV_INCLUDE_PATHS = None
=== OPENCV_DISABLE_PROBES = None
=== CMAKE_PREFIX_PATH = None
=== OpenCV_DIR = None
=== PKG_CONFIG_PATH = None
=== VCPKG_ROOT = None
=== VCPKGRS_DYNAMIC = None
=== Enabled features:
=== ALPHAMAT
=== ARUCO
=== BARCODE
=== BGSEGM
=== BIOINSPIRED
=== CALIB3D
=== CCALIB
=== CUDAARITHM
=== CUDABGSEGM
=== CUDACODEC
=== CUDAFEATURES2D
=== CUDAFILTERS
=== CUDAIMGPROC
=== CUDAOBJDETECT
=== CUDAOPTFLOW
=== CUDASTEREO
=== CUDAWARPING
=== CVV
=== DEFAULT
=== DNN
=== DNN_SUPERRES
=== DPM
=== FACE
=== FEATURES2D
=== FLANN
=== FREETYPE
=== FUZZY
=== GAPI
=== HDF
=== HFS
=== HIGHGUI
=== IMGCODECS
=== IMGPROC
=== IMG_HASH
=== INTENSITY_TRANSFORM
=== LINE_DESCRIPTOR
=== MCC
=== ML
=== OBJDETECT
=== OPTFLOW
=== OVIS
=== PHASE_UNWRAPPING
=== PHOTO
=== PLOT
=== QUALITY
=== RAPID
=== RGBD
=== SALIENCY
=== SFM
=== SHAPE
=== STEREO
=== STITCHING
=== STRUCTURED_LIGHT
=== SUPERRES
=== SURFACE_MATCHING
=== TEXT
=== TRACKING
=== VIDEO
=== VIDEOIO
=== VIDEOSTAB
=== VIZ
=== WECHAT_QRCODE
=== XFEATURES2D
=== XIMGPROC
=== XOBJDETECT
=== XPHOTO
=== Detected probe priority based on environment vars: pkg_config: false, cmake: false, vcpkg: false
=== Probing the OpenCV library in the following order: environment, pkg_config, cmake, vcpkg_cmake, vcpkg
=== Can't probe using: environment, continuing with other methods because: Some environment variables are missing
=== Probing OpenCV library using pkg_config
=== Can't probe using: pkg_config, continuing with other methods because: "pkg-config" "--libs" "--cflags" "opencv4" did not exit successfully: exit status: 1
error: could not find system library 'opencv4' required by the 'opencv' crate

--- stderr
Package opencv4 was not found in the pkg-config search path.
Perhaps you should add the directory containing opencv4.pc' to the PKG_CONFIG_PATH environment variable No package 'opencv4' found , "pkg-config" "--libs" "--cflags" "opencv"` did not exit successfully: exit status: 1
error: could not find system library 'opencv' required by the 'opencv' crate

--- stderr
Package opencv was not found in the pkg-config search path.
Perhaps you should add the directory containing `opencv.pc'
to the PKG_CONFIG_PATH environment variable
No package 'opencv' found

=== Probing OpenCV library using cmake
=== cmake ninja probe command: "cmake" "-S" "/home/husnain/.cargo/registry/src/github.com-1ecc6299db9ec823/opencv-0.62.0/cmake" "-DOCVRS_PACKAGE_NAME=OpenCV" "-DCMAKE_BUILD_TYPE=Debug" "-G" "Ninja"
=== Probing with cmake ninja generator failed, will try Makefile generator, error: cmake returned an error
stdout: "-- Configuring incomplete, errors occurred!\nSee also "/home/husnain/Programming/open-cv-experiment/opencv-face-detector/target/debug/build/opencv-34eb5fa72ffd59a7/out/cmake_probe_build/CMakeFiles/CMakeOutput.log".\n"
stderr: "CMake Error: CMake was unable to find a build program corresponding to "Ninja". CMAKE_MAKE_PROGRAM is not set. You probably need to select a different build tool.\nCMake Error: CMAKE_C_COMPILER not set, after EnableLanguage\nCMake Error: CMAKE_CXX_COMPILER not set, after EnableLanguage\n"
=== cmake makefiles probe command: "cmake" "-S" "/home/husnain/.cargo/registry/src/github.com-1ecc6299db9ec823/opencv-0.62.0/cmake" "-DOCVRS_PACKAGE_NAME=OpenCV" "-DCMAKE_BUILD_TYPE=Debug" "-G" "Unix Makefiles"
=== Probing with cmake Makefile generator failed, will try deprecated find_package, error: cmake returned an error
stdout: "-- The C compiler identification is GNU 9.3.0\n-- The CXX compiler identification is GNU 9.3.0\n-- Check for working C compiler: /usr/bin/cc\n-- Check for working C compiler: /usr/bin/cc -- works\n-- Detecting C compiler ABI info\n-- Detecting C compiler ABI info - done\n-- Detecting C compile features\n-- Detecting C compile features - done\n-- Check for working CXX compiler: /usr/bin/c++\n-- Check for working CXX compiler: /usr/bin/c++ -- works\n-- Detecting CXX compiler ABI info\n-- Detecting CXX compiler ABI info - done\n-- Detecting CXX compile features\n-- Detecting CXX compile features - done\n-- Configuring incomplete, errors occurred!\nSee also "/home/husnain/Programming/open-cv-experiment/opencv-face-detector/target/debug/build/opencv-34eb5fa72ffd59a7/out/cmake_probe_build/CMakeFiles/CMakeOutput.log".\n"
stderr: "CMake Error at CMakeLists.txt:5 (find_package):\n By not providing "FindOpenCV.cmake" in CMAKE_MODULE_PATH this project has\n asked CMake to find a package configuration file provided by "OpenCV", but\n CMake did not find one.\n\n Could not find a package configuration file provided by "OpenCV" with any\n of the following names:\n\n OpenCVConfig.cmake\n opencv-config.cmake\n\n Add the installation prefix of "OpenCV" to CMAKE_PREFIX_PATH or set\n "OpenCV_DIR" to a directory containing one of the above files. If "OpenCV"\n provides a separate development package or SDK, be sure it has been\n installed.\n\n\n"
=== cmake find-package compile probe command: "cmake" "-S" "/home/husnain/.cargo/registry/src/github.com-1ecc6299db9ec823/opencv-0.62.0/cmake" "-DOCVRS_PACKAGE_NAME=OpenCV" "-DCMAKE_BUILD_TYPE=Debug" "--find-package" "-DCOMPILER_ID=GNU" "-DLANGUAGE=CXX" "-DMODE=COMPILE" "-DNAME=OpenCV"
=== Can't probe using: cmake, continuing with other methods because: cmake returned an error
stdout: "OpenCV not found.\n"
stderr: "CMake Error: Problem processing arguments. Aborting.\n\n"
=== Probing OpenCV library using vcpkg_cmake
=== Can't probe using: vcpkg_cmake, continuing with other methods because: Could not find Vcpkg tree: No vcpkg installation found. Set the VCPKG_ROOT environment variable or run 'vcpkg integrate install'
=== Probing OpenCV library using vcpkg
=== Can't probe using: vcpkg, continuing with other methods because: Could not find Vcpkg tree: No vcpkg installation found. Set the VCPKG_ROOT environment variable or run 'vcpkg integrate install', Could not find Vcpkg tree: No vcpkg installation found. Set the VCPKG_ROOT environment variable or run 'vcpkg integrate install'
Error: "Failed to find OpenCV package using probes: environment, pkg_config, cmake, vcpkg_cmake, vcpkg"

Looks like you don't have opencv insatlled in your system. If using ubuntu run sudo apt install libopencv-dev and run cargo clean && cargo build

Thank you so much brother problem is solved

https://docs.rs/opencv/latest/opencv/imgproc/fn.put_text.html
https://docs.rs/opencv/latest/opencv/core/struct.Point_.html#structfield.x

Brother I am trying to use put_text on in my program unable to figure out how to use Point in the put_text function.
here is the snippet of code I am using in my function, it will be kind of you if you help me in this function ?

use opencv::{highgui, prelude::*, imgcodecs, imgproc, Point_  Result};

pub fn image_display_write() -> Result<()> {
    let url = String::from("../image.jpeg") ;
    let mut image_color = imgcodecs::imread(&url, imgcodecs::IMREAD_COLOR)?;
    let mut i = 0 ; 
    loop {
         highgui::imshow("image", &image_color)?;
         let mut key = highgui::wait_key(1)?;
         let font = imgproc::FONT_HERSHEY_SIMPLEX;
         let company:&str="TutorialsPoint";
         imgproc::put_text(&mut image_color, company, (140+i , 250), font, 0.5, [255,255,255], 2, imgproc::LINE_AA , true)?;
         i = i + 1 ; 
         if key == 113{
            break;
        }
    } 
    Ok(())
}

If anyone is facing the same issue but on a windows 10 or 11, follow this solution.