Creating 3D Models from Fingerprint, Shoeprint, and Other Trace Images

3D_fingerprint_App is a small Windows application that converts 2D images of traces into 3D relief models for printing or visualization. It was originally designed for fingerprints but can also be used with shoeprints and other types of trace images. The app loads common image formats (TIFF, JPEG, PNG, BMP), converts them to grayscale, and uses the image resolution (DPI or pixels/cm) to set the correct physical scale in millimetres. Through a simple interface, the user can crop the image, adjust contrast, choose whether dark areas become raised or recessed, smooth the relief, mirror the image, and set the base thickness, maximum relief height, and an overall scale factor. The final physical size (width, height, thickness) is shown before export, and the model can be saved as STL or OBJ for use in standard 3D printing.