PascalVOC-Resizer

A tool written in C#.NET to resize annotated images in PascalVOC format (with zero-pixel padding). I developed this tool to match the 300x300 size of mobilenet ssd. This tool resizes (stretch to fit) images to a defined size (e.g. 300x300). Aspect ratio is not changed -> Gaps are filled with zeros

Original image

Resized image

Libraries

This project is using -EmguCV (https://github.com/commandlineparser/commandline) -CommandLine (https://github.com/commandlineparser/commandline)

How to use

Example

This example uses a

• Image-directory (D:\Wagon-mit-Containern-PascalVOC-export\JPEGImages)
• XML-Annotation directory (D:\Wagon-mit-Containern-PascalVOC-export\Annotations)
• Output-directory (D:\wagon_mit_containern)
• Image width of 300 pixels
• root-directory name "wagons" (which is defined in the annotation xml file) -> this is optional!

ImageResizer.exe -i "D:\Wagon-mit-Containern-PascalVOC-export\JPEGImages" -x "D:\Wagon-mit-Containern-PascalVOC-export\Annotations" -o "D:\wagon_mit_containern" -w 300 -r wagons

This example uses a

• Image-directory with annotation xml-files (D:\Wagon-mit-Containern-PascalVOC-export\JPEGImages)
• Output-directory (D:\wagon_mit_containern)
• Image width of 300 pixels
• root-directory name "wagons" (which is defined in the annotation xml file) -> this is optional!

ImageResizer.exe -i "D:\Wagon-mit-Containern-PascalVOC-export\JPEGImages" -o "D:\wagon_mit_containern" -w 300 -r wagons

This example uses a

• Image-directory with annotation xml-files (D:\Wagon-mit-Containern-PascalVOC-export\JPEGImages)
• Output-directory (D:\wagon_mit_containern)
• Image width of 400 pixels
• Image height of 300 pixels
• root-directory name "wagons" (which is defined in the annotation xml file) -> this is optional!

ImageResizer.exe -i "D:\Wagon-mit-Containern-PascalVOC-export\JPEGImages" -o "D:\wagon_mit_containern" -w 400 -h 300 -r wagons

Arguments:

You can see the arguments by running ImageResizer:

PS C:\Users\lkathke\Desktop\PascalVOC-Resizer> ImageResizer.exe
ImageResizer 1.0.0.0
Copyright ©  2019

ERROR(S):
  Required option 'i' is missing.
  Required option 'o' is missing.
  Required option 'w' is missing.

  -i           Required. The input directory (jpg and xml files are in there)

  -x           (Default: ) XML input directory (optional, if not set, using the same directory for images)

  -o           Required. The output directory

  -w           Required. The Image width

  -h           (Default: -1) The Image height

  -r           (Default: ) The root directory to write in the xml file

  --help       Display this help screen.

  --version    Display version information.

To-Do's

• Images in portrait aspect ratio do not work (only landscape)