Detecting Upscaled Source Video

Detecting Upscaled Source Video

Techniques are disclosed for estimating a source resolution of image data presented to a system. According to these techniques, input image data may be converted to a domain of frequency coefficients. Each coefficient may represent content of the input image along a respective pair of frequencies ex...

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Hauptverfasser: Francis, Paul A, Lin, Yu Chieh, Makower, David
Format: Patent
Sprache:eng
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ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
PICTORIAL COMMUNICATION, e.g. TELEVISION
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
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creator Francis, Paul A
Lin, Yu Chieh
Makower, David
description Techniques are disclosed for estimating a source resolution of image data presented to a system. According to these techniques, input image data may be converted to a domain of frequency coefficients. Each coefficient may represent content of the input image along a respective pair of frequencies extending in two dimensions. For each set of frequency coefficients having a common frequency in one of the dimensions, zero crossings of coefficient values may be detected. The zero crossings may be counted at each frequency position in the second dimension. An estimate of the input image's source resolution may be estimated from a comparison of the zero crossings. For video, this process may be performed across images of an input video sequences.
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According to these techniques, input image data may be converted to a domain of frequency coefficients. Each coefficient may represent content of the input image along a respective pair of frequencies extending in two dimensions. For each set of frequency coefficients having a common frequency in one of the dimensions, zero crossings of coefficient values may be detected. The zero crossings may be counted at each frequency position in the second dimension. An estimate of the input image's source resolution may be estimated from a comparison of the zero crossings. 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subjects ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
PICTORIAL COMMUNICATION, e.g. TELEVISION
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
title Detecting Upscaled Source Video
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