User-directed analysis of scanned images

Abstract

Digital capture (scanning in all its forms, and digital photography/video recording), in providing virtually free temporary memory of captured information, allows users to "overgather" information during capture, and then to discard unwanted material later. For cameras and video recorders, such editing largely consists of discarding images or frames in their entirety. For scanners (and high-resolution camera/video), such editing benefits from a preview capability that provides quick and reliable user-interface tools for selecting, filtering and saving specific portions of the input. Appropriate preview user interface (UI) tools ease the accessing, editing and dispatch to desired destination (archive, application, webpage, etc.) of captured information (text, tables, drawings, photos, etc.). In this paper, we present several different means for the user-directed "rapid capture" of portions of a scanned image. Specifically, we review past, present and future preview-based UI tools that allow efficient and accurate means of capture to the user. The bases of these tools, as described herein, are user-directed zoning analysis, known as "click and select", which incorporates a bottom-up zoning analysis engine; and statistics-based region classification, which allows rapid reconfiguration of region identification and clustering. We conclude with our view of the future of UIdirected capture.

Document Analysis System for Automating Workflows

“…The per-page failure rate is thus greater than 5%, and the time for analysis is typically an order of magnitude greater than that of the method presented here. Allowing users to correct the analysis, such as is commonplace for a preview-scan workflow motif [4], is not generally acceptable for copier auto-typing. Comparatively, our method is faster (0.3 sec on the "test system") and more accurate, and is suitable for implementation in high throughput devices such as 50 ppm machines without deleteriously affecting performance or processing accuracy.…”

Layout and Content Extraction for PDF Documents

“…To find the vector graphics component blocks on the page, we had the choice of analyzing PDF directly [16] or applying document image segmentation technique in the automatic mode [18,19]. We found in a lot of cases, for vector graphics components, it was more straightforward to analyze the bitmap of the page than to follow the drawings of the path objects on the page.…”