gtmaker

gtmaker is a desktop application for image annotation, specifically designed for creating ground truth data for computer vision and machine learning projects. It provides an intuitive interface for marking objects in images with precise geometric shapes.

Key Features

• Rectangle Annotation — Draw bounding boxes by clicking and dragging on images to define object locations.
• Contour Annotation — Create polygonal shapes by placing points and closing loops for detailed object outlines.
• Image Adjustment — Pan images using space key + drag and zoom with mouse scroll for precise annotation placement.
• Save/Load Functionality — Export annotations and reload previous work from saved directories.

Philosophy

gtmaker focuses on simplicity and efficiency, providing essential annotation tools without unnecessary complexity to streamline the data preparation workflow.