Edge enhancement by unsharp masking using liquid-crystal displays

摘要

A new method for real-time edge enhancement is presented. The method is based on the capacity of liquid-crystal displays to generate a contrast-reverted replica of the image displayed on it. When the negative replica is defocused and it is superposed to the original image (displayed in a second liquid-crystal display), one obtains an image with enhanced second derivatives. The proposed technique resembles the classical (photographic) unsharp masking method, but unlike the time-consuming photographic implementation, it can be applied in real-time. The proposed method is potentially interesting for image processing in areas such as microscopy, industrial edge inspection, etc. Validation experiments are presented.View full textDownload full textKeywordsimage processing, edge enhancementRelated var addthis_config = { ui_cobrand: "Taylor & Francis Online", services_compact: "citeulike,netvibes,twitter,technorati,delicious,linkedin,facebook,stumbleupon,digg,google,more", pubid: "ra-4dff56cd6bb1830b" }; Add to shortlist Link Permalink http://dx.doi.org/10.1080/09500340.2010.493244