Convert PNG to PTS

Understanding PNG and PTS file formats

PNG (Portable Network Graphics) is a widely used raster image format known for its lossless compression and support for transparency. It is commonly used for web graphics, digital photos, and images requiring high quality.

PTS files, on the other hand, are typically associated with landmark annotation data in computer vision and facial recognition tasks. A PTS file is a plain text file that stores coordinates of key points (landmarks) on an image, often used for training or evaluating machine learning models.

How to convert PNG to PTS

Converting a PNG image to a PTS file is not a direct image-to-image conversion. Instead, it involves annotating the PNG image by marking specific points of interest (such as facial landmarks) and saving their coordinates in the PTS format.

This process is typically done using image annotation software that supports exporting to the PTS format. The steps generally include:

1. Open your PNG image in an annotation tool.
2. Manually mark the required landmarks or points on the image.
3. Export or save the annotation as a PTS file.

Recommended software for PNG to PTS conversion

The best software for this task is LabelMe or dlib's imglab tool. Both are popular for creating landmark annotations and exporting them in PTS format.

• LabelMe: A web-based annotation tool. After annotating, you can export the points and convert them to PTS format using a script.
• dlib imglab: A command-line tool specifically designed for facial landmark annotation. It can export directly to PTS format.

For dlib imglab:

1. Install dlib and imglab.
2. Run imglab and open your PNG image.
3. Annotate the landmarks.
4. Export using File → Export → PTS.

Summary

Converting a PNG to a PTS file involves annotating landmarks on the image and exporting their coordinates. Use tools like dlib imglab or LabelMe for accurate and efficient conversion.