Removing burned-in text from moving video frames was once a labor-intensive manual task requiring VFX artists to clone pixels frame-by-frame. Today, deep learning neural networks combine optical character recognition (OCR) with spatio-temporal video inpainting algorithms to automate text removal seamlessly.
Step 1: Text Detection with OCR & Bounding Boxes
The first phase relies on deep learning Optical Character Recognition (OCR) engines like EasyOCR or CRAFT (Character Region Awareness for Text Detection). The model scans video frames to detect text character boundaries, returning pixel coordinate bounding boxes for every detected word or subtitle line.
Step 2: Spatio-Temporal Motion Tracking
Unlike static images, video text exists across time. Optical flow algorithms calculate vector displacement between adjacent frames (t-1, t, t+1) to ensure the bounding box mask tracks camera motion and object movement without visual jitter.
Step 3: Neural Background Inpainting
Once masked, neural inpainting networks (such as ProPainter or OpenCV Navier-Stokes inpainting) sample unmasked background pixels from past and future frames to synthesize realistic textures behind the erased text.