[python] dlib installation on Windows 10

I want to use dlib with python for image recognition. I have the python app running great with OpenCV on Windows 10, but when I want to install dlib from the cmd it gives me this following error :

error: Cannot find cmake, ensure it is installed and in the path. You
can install cmake using the instructions at https://cmake.org/install/
You can also specify its path with --cmake parameter.

What should I do?

My command prompt error

This question is related to python image-processing dlib

The answer is

Install Dlib from .whl

Dlib 19.7.0

pip install https://pypi.python.org/packages/da/06/bd3e241c4eb0a662914b3b4875fc52dd176a9db0d4a2c915ac2ad8800e9e/dlib-19.7.0-cp36-cp36m-win_amd64.whl#md5=b7330a5b2d46420343fbed5df69e6a3f

You can test it, downloading an example from the site, for example SVM_Binary_Classifier.py and running it on your machine.

Note: if this message occurs you have to build dlib from source:

dlib-19.7.0-cp36-cp36m-win_amd64.whl is not a supported wheel on this platform

Install Dlib from source (If the solution above doesn't work)

Windows Dlib > 19.7.0

  1. Download the CMake installer and install it: https://cmake.org/download/
  2. Add CMake executable path to the Enviroment Variables:

    set PATH="%PATH%;C:\Program Files\CMake\bin"

    note: The path of the executable could be different from C:\Program Files\CMake\bin, just set the PATH accordingly.

    note: The path will be set temporarily, to make the change permanent you have to set it in the “Advanced system settings” ? “Environment Variables” tab.

  3. Restart The Cmd or PowerShell window for changes to take effect.

  4. Download the Dlib source(.tar.gz) from the Python Package Index : https://pypi.org/project/dlib/#files extract it and enter into the folder.
  5. Check the Python version: python -V. This is my output: Python 3.7.2 so I'm installing it for Python3.x and not for Python2.x

    note: You can install it for both Python 2 and Python 3, if you have set different variables for different binaries i.e: python2 -V, python3 -V

  6. Run the installation: python setup.py install

Linux Dlib 19.17.0

sudo apt-get install cmake

wget https://files.pythonhosted.org/packages/05/57/e8a8caa3c89a27f80bc78da39c423e2553f482a3705adc619176a3a24b36/dlib-19.17.0.tar.gz

tar -xvzf dlib-19.17.0.tar.gz

cd dlib-19.17.0/

sudo python3 setup.py install

note: To install Dlib for Python 2.x use python instead of python3 you can check your python version via python -V

Follow these steps:

  • pip install cmake
  • Install Visual Studio build tools from here.
  • In Visual Studio 2017 go to the Individual Components tab, Visual C++ Tools for Cmake, and check the checkbox under the "Compilers, build tools and runtimes" section.
  • pip install dlib

As you can see many answers above, But i would like to post a quick solution which works for sure in Anaconda3. I haven't chosen Visual Studio as it consumes lot of memory.

Please follow the below steps.

Step 1:
Install windows cmake.msi and configure environment variable
Step 2:
Create a conda environment, and install cmake using the below command.
pip install cmake
Step 3:
conda install -c conda-forge dlib

Note you can find few other dlib packages, but the above one will works perfectly with this procedure.

dlib will be successfully installed.

You need to install Cmake.

dlib is an c++ libary with python bindings. It needs to be builded first. My guess is this will happen automatically once you have installed Cmake

Effective till now(2020).

pip install cmake
conda install -c conda-forge dlib

You have to install cmake as the error tells you.

you can follow this instructions https://www.learnopencv.com/install-dlib-on-windows/

or directly install cmake from here https://cmake.org/download/

Once cmake is installed pip install dlib should work.

I had vstudio building tools installed whe I did my test.

Choose dlib .whl file according to your installed python version. For example if installed python version is 3.6.7 , 64bit system or if python is 3.5.0 32 bit then choose dlib-19.5.1-cp36-cp36m-win_amd64.whl and dlib-18.17.100-cp35-none-win32.whl respectively.

Bolded text says the python supporting version.

Download wheel file from here or copy the link address

pip install dlib-19.5.1-cp36-cp36m-win_amd64.whl

for above method .whl file shoud be in the working directory


Below link for python3.6 supporting dlib link, for python 3.5 u can replace with dlib 35.whl link

pip install https://files.pythonhosted.org/packages/24/ea/81e4fc5b978277899b1c1a63ff358f1f645f9369e59d9b5d9cc1d57c007c/dlib-19.5.1-cp36-cp36m-win_amd64.whl#sha256=7739535b76eb40cbcf49ba98d894894d06ee0b6e8f18a25fef2ab302fd5401c7

Simple and 100% working trick

(Make sure you install cmake)

My Anaconda python ver : 3.6.8 (64 bit) | OS :Windows 10

python -m pip install https://files.pythonhosted.org/packages/0e/ce/f8a3cff33ac03a8219768f0694c5d703c8e037e6aba2e865f9bae22ed63c/dlib-19.8.1-cp36-cp36m-win_amd64.whl#sha256=794994fa2c54e7776659fddb148363a5556468a6d5d46be8dad311722d54bfcf

enter image description here

You can use vcpkg to install dlib.

If you don't have vcpkg, you can get it here (Read Quick Start)

After you got vcpkg, run:

vcpkg install dlib:x64-windows

Just a quick update on what has worked for me (two years later). Davis King has provided two ways to add the latest python dlib (19.17.0) to any python environment in Windows 10 for me. Note, I run several Linux configs in Oracle VirtualBox but Windows 10 is my native OS which has access to the Nvidia GPU so i need an install on Windows 10. (Cannot access the GPU - easily - through VirtualBox).

First - the easiest:

pip install dlib

and the website link: https://pypi.org/project/dlib/

And then it can be easily be build from sources. Download from https://pypi.org/simple/dlib/ and follow instructions on http://dlib.net/compile.html.

Also, just found another way to access with Visual Studio 2019 (or 2017). Use vcpkg - see link https://vcpkg.readthedocs.io/en/latest/

I built dlib 19.17 on Windows 10 with CMake and it worked fine but then I found vcpkg and now the dlib libraries are integral to the Visual Studio. I no longer need to add all the external links to C++ and the linker.The version in vcpkg is currently 19.16-1 and it is built with full CUDA support.

Hope this helps others..

After spending a lot of time, this comment gave me the right result.


  1. Download Python 3.6.8 and install, make sure you add it to PATH.

  2. Install NumPy, scipy, matplotlib and pandas in your pc/laptop with this command in command prompt:-

    pip install numpy

    pip install scipy

    pip install matplotlib

    pip install pandas

  3. Go to https://pypi.org/project/wheel/#files and right click on filename wheel-0.33.6-py2.py3-none-any.whl (21.6 kB) and copy link address. Then go to your pc/laptop, open command prompt and write this command "python -m pip install" after this command space first then paste the link copied. After install successful go to next step.

  4. Then go this link, https://pypi.org/simple/dlib/ and right click on filename "dlib-19.8.1-cp36-cp36m-win_amd64.whl" then copy link address. Then open command prompt and do the same as step 2 which is, write this command "python -m pip install" after this command space first then paste the link copied. then the dlib will be installed successfully.

  5. After that, type python and enter, then type import dlib to check dlib is installed perfectly. the you can proceed to install face recognition.py which suite for python 3.6.

So basically I have been searching the solution for two days. I tried everything

  • Installing Cmake
  • Adding path
  • installing dlib from the links mentioned in the answers
  • Installing ## Heading ## numpy, scipy, matplotlib, pandas
  • etc etc etc


After installing MS VS C++ I ran command pip install dlib and it is working like a charm. BEST OF LUCK

Link to download Visual Studio C++


I have recently installed dlib on python 3.7. First I have installed cmake from anaconda navigator (cmake version 3.14.0) Next i installed visual studio 2019 and installed Desktop development with C++ . Then I do pip install dlib and now its working

If you're trying to install dlib on Windows 10 with Visual Studio 2019, then first perform:

pip install cmake

And set it in the environment variable. After that, make sure that you have the latest version of Visual Studio SDK installed. After that, perform:

pip install dlib

I hope this solves the problem

It is basically a two-step process:

  1. install cmap
pip install cmap
  1. install dlib
pip install https://pypi.python.org/packages/da/06/bd3e241c4eb0a662914b3b4875fc52dd176a9db0d4a2c915ac2ad8800e9e/dlib-19.7.0-cp36-cp36m-win_amd64.whl#md5=b7330a5b2d46420343fbed5df69e6a3f

1.use python 3.6.9 version

2.first install cmake.

conda install -c anaconda cmake
  1. use these command to install dlib

pip install https://pypi.python.org/packages/da/06/bd3e241c4eb0a662914b3b4875fc52dd176a9db0d4a2c915ac2ad8800e9e/dlib-19.7.0-cp36-cp36m-win_amd64.whl#md5=b7330a5b2d46420343fbed5df69e6a3f

None of the answers worked for me. This is what worked Assuming you have anaconda python 3.7 installed

1) Dowload and install cmake(make sure to check the option to add cmake to system path during installation to avoid manually doing later) Download from this link cmake download

2) conda install -c conda-forge dlib

Install dlib in Windows

download dlib from https://github.com/davisking/dlib.git

download camke from https://cmake.org/download/

Extract cmake and configure it as Environment variable to the extracted path my it was C:\Users\admin\Downloads\cmake-3.8.1-win32-x86\cmake-3.8.1-win32-x86\bin

Now extract dlib zip file and go to dlib folder

Follow this commands

cd dlib/test
mkdir build
cd build
cmake ..
cmake --build . --config Release

Now go to Release folder which would be at dlib\test\build\Release and execute this command dtest.exe --runall

This process takes time as cmake compiles all C++ files so stay clam. Enjoy!!!

Questions with python tag:

programming a servo thru a barometer Is there a way to view two blocks of code from the same file simultaneously in Sublime Text? python variable NameError Why my regexp for hyphenated words doesn't work? Comparing a variable with a string python not working when redirecting from bash script is it possible to add colors to python output? Get Public URL for File - Google Cloud Storage - App Engine (Python) Real time face detection OpenCV, Python xlrd.biffh.XLRDError: Excel xlsx file; not supported Could not load dynamic library 'cudart64_101.dll' on tensorflow CPU-only installation Upgrade to python 3.8 using conda Unable to allocate array with shape and data type How to fix error "ERROR: Command errored out with exit status 1: python." when trying to install django-heroku using pip How to prevent Google Colab from disconnecting? "UserWarning: Matplotlib is currently using agg, which is a non-GUI backend, so cannot show the figure." when plotting figure with pyplot on Pycharm How to fix 'Object arrays cannot be loaded when allow_pickle=False' for imdb.load_data() function? "E: Unable to locate package python-pip" on Ubuntu 18.04 Tensorflow 2.0 - AttributeError: module 'tensorflow' has no attribute 'Session' Jupyter Notebook not saving: '_xsrf' argument missing from post How to Install pip for python 3.7 on Ubuntu 18? Python: 'ModuleNotFoundError' when trying to import module from imported package OpenCV TypeError: Expected cv::UMat for argument 'src' - What is this? Requests (Caused by SSLError("Can't connect to HTTPS URL because the SSL module is not available.") Error in PyCharm requesting website How to setup virtual environment for Python in VS Code? Pylint "unresolved import" error in Visual Studio Code Pandas Merging 101 Numpy, multiply array with scalar What is the meaning of "Failed building wheel for X" in pip install? Selenium: WebDriverException:Chrome failed to start: crashed as google-chrome is no longer running so ChromeDriver is assuming that Chrome has crashed Could not install packages due to an EnvironmentError: [Errno 13] OpenCV !_src.empty() in function 'cvtColor' error ConvergenceWarning: Liblinear failed to converge, increase the number of iterations How to downgrade python from 3.7 to 3.6 I can't install pyaudio on Windows? How to solve "error: Microsoft Visual C++ 14.0 is required."? Iterating over arrays in Python 3 How do I install opencv using pip? How do I install Python packages in Google's Colab? How do I use TensorFlow GPU? How to upgrade Python version to 3.7? How to resolve TypeError: can only concatenate str (not "int") to str How can I install a previous version of Python 3 in macOS using homebrew? Flask at first run: Do not use the development server in a production environment TypeError: only integer scalar arrays can be converted to a scalar index with 1D numpy indices array What is the difference between Jupyter Notebook and JupyterLab? Pytesseract : "TesseractNotFound Error: tesseract is not installed or it's not in your path", how do I fix this? Could not install packages due to a "Environment error :[error 13]: permission denied : 'usr/local/bin/f2py'" How do I resolve a TesseractNotFoundError? Trying to merge 2 dataframes but get ValueError Authentication plugin 'caching_sha2_password' is not supported Python Pandas User Warning: Sorting because non-concatenation axis is not aligned

Questions with image-processing tag:

Convert np.array of type float64 to type uint8 scaling values dlib installation on Windows 10 OpenCV - Saving images to a particular folder of choice How do I increase the contrast of an image in Python OpenCV OpenCV & Python - Image too big to display TypeError: Image data can not convert to float Extracting text OpenCV c++ and opencv get and set pixel color to Mat cv2.imshow command doesn't work properly in opencv-python How does one convert a grayscale image to RGB in OpenCV (Python)? inverting image in Python with OpenCV Resize image in PHP Displaying Image in Java Convert image from PIL to openCV format Show an image preview before upload How to plot a 2D FFT in Matlab? How to view .img files? OpenCV - Apply mask to a color image Image Processing: Algorithm Improvement for 'Coca-Cola Can' Recognition image processing to improve tesseract OCR accuracy How to get a pixel's x,y coordinate color from an image? OpenCV C++/Obj-C: Detecting a sheet of paper / Square Detection How do I find Waldo with Mathematica? Is there a way to detect if an image is blurry? Converting an OpenCV Image to Black and White Combining Two Images with OpenCV Converting Numpy Array to OpenCV Array How to Apply Mask to Image in OpenCV? Recommendation for compressing JPG files with ImageMagick Resize image proportionally with MaxHeight and MaxWidth constraints converting a base 64 string to an image and saving it How to merge a transparent png image with another image using PIL How can I sharpen an image in OpenCV? How to fill OpenCV image with one solid color? How to scale a BufferedImage Simple and fast method to compare images for similarity How to resize an image with OpenCV2.0 and Python2.6 Peak detection in a 2D array Gaussian filter in MATLAB Convert an image to grayscale Fast Bitmap Blur For Android SDK c# Image resizing to different size while preserving aspect ratio Mean filter for smoothing images in Matlab Convert RGB to Black & White in OpenCV Face recognition Library How to crop an image using C#? Converting RGB to grayscale/intensity UIImage: Resize, then Crop What is the best java image processing library/approach? How to store file name in database, with other info while uploading image to server using PHP?

Questions with dlib tag:

dlib installation on Windows 10