Windows & Linux GUI for marking bounded boxes of objects in images for training Yolo v3 and v2

  • To compile on Windows open yolo_mark.sln in MSVS2013/2015, compile it x64 & Release and run the file: x64/Release/yolo_mark.cmd. Change paths in yolo_mark.sln to the OpenCV 2.x/3.x installed on your computer:

    • (right click on project) -> properties -> C/C++ -> General -> Additional Include Directories: C:\opencv_3.0\opencv\build\include;

    • (right click on project) -> properties -> Linker -> General -> Additional Library Directories: C:\opencv_3.0\opencv\build\x64\vc14\lib;

  • To compile on Linux type in console 3 commands:

    cmake .

Supported both: OpenCV 2.x and OpenCV 3.x

  1. To test, simply run
  • on Windows: x64/Release/yolo_mark.cmd
  • on Linux: ./
  1. To use for labeling your custom images:
  1. To training for your custom objects, you should change 2 lines in file x64/Release/yolo-obj.cfg:

3.1 Download pre-trained weights for the convolutional layers (76 MB):

3.2 Put files: yolo-obj.cfg, data/train.txt, data/obj.names, data/, darknet19_448.conv.23 and directory data/img near with executable darknet-file, and start training: darknet detector train data/ yolo-obj.cfg darknet19_448.conv.23

For a detailed description, see:

How to get frames from videofile:

To get frames from videofile (save each N frame, in example N=10), you can use this command:

  • on Windows: yolo_mark.exe data/img cap_video test.mp4 10
  • on Linux: ./yolo_mark x64/Release/data/img cap_video test.mp4 10

Directory data/img should be created before this. Also on Windows, the file opencv_ffmpeg340_64.dll from opencv\build\bin should be placed near with yolo_mark.exe.

As a result, many frames will be collected in the directory data/img. Then you can label them manually using such command:

  • on Windows: yolo_mark.exe data/img data/train.txt data/obj.names
  • on Linux: ./yolo_mark x64/Release/data/img x64/Release/data/train.txt x64/Release/data/obj.names

Here are:

  • /x64/Release/

    • yolo_mark.cmd - example hot to use yolo mark: yolo_mark.exe data/img data/train.txt data/obj.names
    • train_obj.cmd - example how to train yolo for your custom objects (put this file near with darknet.exe): darknet.exe detector train data/ yolo-obj.cfg darknet19_448.conv.23
    • yolo-obj.cfg - example of yoloV3-neural-network for 2 object
  • /x64/Release/data/

    • obj.names - example of list with object names
    • - example with configuration for training Yolo v3
    • train.txt - example with list of image filenames for training Yolo v3
  • /x64/Release/data/img/air4.txt - example with coordinates of objects on image air4.jpg with aircrafts (class=0)

Image of Yolo_mark

Instruction manual

Mouse control

Button Description
Left Draw box
Right Move box

Keyboard Shortcuts

Shortcut Description
Next image
Previous image
r Delete selected box (mouse hovered)
c Clear all marks on the current image
p Copy previous mark
o Track objects
ESC Close application
n One object per image
0-9 Object id
m Show coords
w Line width
k Hide object name
h Help


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贡献者 9


  • C++ 98.0 %
  • CMake 0.8 %
  • Batchfile 0.8 %
  • Shell 0.4 %