Methods and systems for real-time image-capture feedback
First Claim
Patent Images
1. A method for image acquisition, said method comprising:
- obtaining a preview-frame image;
extracting a first image feature from said preview-frame image, wherein said extracting said first image feature comprises;
determining a top-boundary line of a document region;
determining a bottom-boundary line of said document region;
determining a left-boundary line of said document region;
determining a right-boundary line of said document region;
determining a horizontal vanishing point;
determining a vertical vanishing point;
determining a first distance between said horizontal vanishing point and a center point associated with the center of said preview-frame image; and
determining a second distance between said vertical vanishing point and said center point;
interpreting said first image feature in relation to a first acquisition factor; and
rendering an overlaid preview-frame image comprising a first cue associated with said first acquisition feature.
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Abstract
Aspects of the present invention are related to systems and methods for providing real-time feed-back cues in an image acquisition process. An overlaid preview-frame image may be rendered comprising cues associated with acquisition factors. A cue may indicate whether, or not, an acquisition-factor value falls within a range of acceptable values. Image features may be extracted, from a preview-frame image, and interpreted to determine acquisition-factor values and their acceptability.
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Citations
25 Claims
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1. A method for image acquisition, said method comprising:
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obtaining a preview-frame image; extracting a first image feature from said preview-frame image, wherein said extracting said first image feature comprises; determining a top-boundary line of a document region; determining a bottom-boundary line of said document region; determining a left-boundary line of said document region; determining a right-boundary line of said document region; determining a horizontal vanishing point; determining a vertical vanishing point; determining a first distance between said horizontal vanishing point and a center point associated with the center of said preview-frame image; and determining a second distance between said vertical vanishing point and said center point; interpreting said first image feature in relation to a first acquisition factor; and rendering an overlaid preview-frame image comprising a first cue associated with said first acquisition feature. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A method for image acquisition, said method comprising:
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obtaining a preview-frame image; extracting a plurality of image features from said preview-frame image, wherein said extracting said plurality of image feature from said preview-frame image comprises; determining a top-boundary line of a document region; determining a bottom-boundary line of said document region; determining a left-boundary line of said document region; determining a right-boundary line of said document region; determining a horizontal vanishing point; determining a vertical vanishing point; determining a first distance between said horizontal vanishing point and a center point associated with the center of said preview-frame image; and determining a second distance between said vertical vanishing point and said center point; interpreting said plurality of image features in relation to a plurality of acquisition factors, thereby determining an acquisition-factor value for each of said acquisition factors in said plurality of acquisition factors; determining, for each of said acquisition-factor values, if said acquisition-factor value is satisfactory; when each of said acquisition-factor values is satisfactory, acquiring a first image; and when, at least one of said acquisition-factor values is not satisfactory, rendering an overlaid preview-frame image comprising a plurality of cues associated with said acquisition-factor values. - View Dependent Claims (25)
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Specification