Method and device for improving the visibility especially of thin lines
AssigneeNXP B.V.
InventorsVolker Blume, Stephan Gross
Life of this patent
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Abstract
The invention relates to a method and a device to detect thin lines of an incoming signal, especially of an image or video signal, comprising the steps of: analysing the incoming signal, calculating the first derivative of the incoming signal (52), analysing and marking the crossing of zero of the fust derivative (53), analysing the direction of the zero crossing (54) and coding the direction into the zero-signal, eliminating noise and invalid alternating sequences to identify the existence of a thin line.
Claims9
Method for detecting thin lines of an incoming signal, comprising the steps of:
- analysing the incoming signal;
- calculating a first derivative of the incoming signal;
- analysing and marking a crossing of zero of the first derivative;
- analysing a direction of the zero crossing and coding the direction into the zero-signal, and
- eliminating noise and invalid alternating sequences to identify an existence of a thin line.
Electronic device for detecting thin lines of an incoming signal, comprising:
- means for analyzing the incoming signal;
- means for calculating a first derivative of the incoming signal;
- means for analyzing and marking a crossing of zero of the first derivative;
- means for analyzing a direction of the zero crossing and coding the direction into the zero-signal;
- and
- means for eliminating noise and invalid alternating sequences for identifyin an existence of a thin line.
Dependencies are inferred from the claim text.