A Simple Image Labeling Tool

1. Installation
   • Install Opencv
   • Add the Absolute path to OpenCV folder containing OpenCVConfig.cmake to config_vars.txt
   • Cmake

     # In the project directory
     mkdir build/
     cd build/
     cmake ../

   • Build

     # In build/
     make

2. Run

   • Select the directory containing images to be labeled

     # In build/
     ./DisplayImage "<Directory Path containing images>/*.jpg"

   • Select Bounding Boxes or Segmentation Masks labeling following the program

   • Select the path for saving segmentation masks. The directory will be created if not existed.

Bounding Boxes Labeling

• Press "a" & "d" for the previous and next image

• Left button on Mouse for adding a point of bounding-box

• Right button on Mouse for undoing

  

  You will get a label.csv containing the coordinates. The $i$'th bounding box is composed of two points $(x_i^1, y_i^1)$, $(x_i^2, y_i^2)$.

  image name	$x_1^1$	$y_1^1$	$x_1^2$	$y_1^2$	$x_2^1$	$y_2^1$	...
  arrow.jpg	293	189	485	479	496	328	628
  text.png	40	71	82	122	91	70	130
  triangular_sign.png	224	485	322	587	327	481	415

• Press "q" for quiting the program

Semgentation Masks Labeling

• Press "a" & "d" for the previous and next image

• Press "s" & "w" for the previous and next label index

• Press "1" & "2" for the thinner and thicker brush

• Left button on Mouse for labeling a segmentation mask. Drag the mouse for larger area.

• Right button on Mouse for undoing

  

  You will get segmentation mask results like the following.

• Press "q" for quiting the program