Overscan Detection in Digitized Analog Films by Precise Sprocket Hole Segmentation

Historian: A Large-Scale Historical Film Dataset with Cinematographic Annotation

“…However, this dataset lacks due to the limited number of available samples as well as the missing temporal shot information. Historical film documentaries provide unique challenges, such as damaged film reels [8,12], or overscan areas [8,22] (e.g. sprocket holes, frame lines).…”

“…Our investigation focuses on standard movements such as pans, tilts, dollies, trucks, tracks, pedestals, and zooms. Additionally, sprocket holes and the frame window of several analog film formats (16mm and 35mm) are marked for cropping the overscan areas [8,22]. The dataset includes 98 annotated historical film documentaries (1440 by 1080 pixels, 24fps).…”

“…The overscan artifacts are masked to provide researchers the possibility to work with both cropped and uncropped films. Researchers may also be interested in working on automatic overscan detection tasks [22]. The annotation procedure is done manually by using the Visual Object Tagging Tool (VOTT) 4 .…”

“…Polygons are drawn to overlap as accurately as possible with the Sprocket Holes (SH). The bounding box coordinates for the frame window are selected by considering the most inner points of the SHs for 16mm film reels, while the most outer point of the SHs are selected for 35mm reels [22]. For all films showing overscan artifacts, one annotation block containing the segmented sprocket holes (Polygons) as well as the final frame window (Bounding Box) is added.…”

The digital resurrection of Margaret Thatcher: Creative, technological and legal dilemmas in the use of deepfakes in screen drama

“…This work synthesised film deterioration effects and applied it to existing footage, then trained a network to remove this degradation. Other approaches can detect and remove specific artefacts for historical footage (Helm and Kampel, 2020) or noise in images (Yuzhi et al, 2020).…”