Json2PascalVoc

Json2PascalVoc is a Python library for converting some special Json strings to PascalVOC format XML files.

Installation

Use the package manager pip to install Json2PascalVoc.

pip install Json2PascalVoc

Or download package from GitHub

Usage

from Json2PascalVoc.Converter import Converter

myConverter = Converter()
# returns a Converter Object
myConverter.convertJsonToPascal("data.json")
# Converts Json to PascalVOC XML and saves the XML file to the related file path

An example data.json file is :

{
   "data":[
      {
         "annotation":{
            "folder":"class1",
            "filename":"_ADC0362.jpg",
            "path":"~/Desktop/Dev/data/foo/train/class1/_ADC0362.jpg",
            "source":{
               "database":"Unknown"
            },
            "size":{
               "width":1500,
               "height":1500,
               "depth":3
            },
            "segmented":0,
            "object":[
               {
                  "name":"class1",
                  "pose":"Unspecified",
                  "truncated":0,
                  "difficult":0,
                  "bndbox":{
                     "xmin":579,
                     "ymin":584,
                     "xmax":924,
                     "ymax":1120
                  }
               },
               {
                  "name":"class1",
                  "pose":"Unspecified",
                  "truncated":0,
                  "difficult":0,
                  "bndbox":{
                     "xmin":120,
                     "ymin":400,
                     "xmax":1150,
                     "ymax":800
                  }
               }

            ]
         }
      },
      {
         "annotation":{
            "folder":"class1",
            "filename":"_ADC0373.jpg",
            "path":"~/Desktop/Dev/data/foo/train/class1/_ADC0373.jpg",
            "source":{
               "database":"Unknown"
            },
            "size":{
               "width":1500,
               "height":1500,
               "depth":3
            },
            "segmented":0,
            "object":[
               {
                  "name":"class1",
                  "pose":"Unspecified",
                  "truncated":0,
                  "difficult":0,
                  "bndbox":{
                     "xmin":487,
                     "ymin":558,
                     "xmax":798,
                     "ymax":942
                  }
               }
            ]
         }
      }
   ]
}

Notes:

1- "data" array of Json can contain multiple "annotation" objects for different images.

2- "annotation" objects can contain multiple "object" attributes for multi object detecting in a single image.

3- PascalVOC formatted XML files are saved to the path that is given in "annotation.path" for each image/"annotation"

The output XML for an image is like :

<?xml version="1.0" encoding="UTF-8"?>
<annotation>
   <folder name="folder">class1</folder>
   <filename name="filename">_ADC0362.jpg</filename>
   <path name="path">~/Desktop/Dev/data/foo/train/class1/_ADC0362.jpg</path>
   <source>
      <database name="database">Unknown</database>
   </source>
   <size>
      <width name="width">1500</width>
      <height name="height">1500</height>
      <depth name="depth">3</depth>
   </size>
   <segmented name="segmented">0</segmented>
   <object>
      <name name="name">class1</name>
      <pose name="pose">Unspecified</pose>
      <truncated name="truncated">0</truncated>
      <difficult name="difficult">0</difficult>
      <bndbox>
         <xmin name="xmin">579</xmin>
         <ymin name="ymin">584</ymin>
         <xmax name="xmax">924</xmax>
         <ymax name="ymax">1120</ymax>
      </bndbox>
   </object>
   <object>
      <name name="name">class1</name>
      <pose name="pose">Unspecified</pose>
      <truncated name="truncated">0</truncated>
      <difficult name="difficult">0</difficult>
      <bndbox>
         <xmin name="xmin">120</xmin>
         <ymin name="ymin">400</ymin>
         <xmax name="xmax">1150</xmax>
         <ymax name="ymax">800</ymax>
      </bndbox>
   </object>
</annotation>

Contributing

Pull requests are welcome. For major changes, please open an issue first to discuss what you would like to change.

License

MIT