Correction of distortion in captured images
First Claim
Patent Images
1. An image processing method comprising:
- analyzing, by an image processing apparatus, an image of a portion of text having at least one line;
detecting, by the image processing apparatus, inter-line spacing and inter-word spacing across an area of the image;
based on the detected inter-line spacing and the inter-word spacing, deriving a quadrilateral shape, the quadrilateral shape representing a deformation of the image from an undistorted image; and
modifying, by the image processing apparatus, the image to perform perspective correction based on the derived quadrilateral shape.
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Abstract
An image processing method comprises analyzing an image of a portion of text, and detecting the inter-line spacing and the inter-word spacing across the area of the image. Based on the inter-line and inter-word spacings, a quadrilateral shape is derived which represents the deformation of the text image from an undistorted image. The image is modified to perform perspective correction based on the derived quadrilateral.
23 Citations
10 Claims
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1. An image processing method comprising:
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analyzing, by an image processing apparatus, an image of a portion of text having at least one line; detecting, by the image processing apparatus, inter-line spacing and inter-word spacing across an area of the image; based on the detected inter-line spacing and the inter-word spacing, deriving a quadrilateral shape, the quadrilateral shape representing a deformation of the image from an undistorted image; and modifying, by the image processing apparatus, the image to perform perspective correction based on the derived quadrilateral shape. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A non-transitory computer readable medium comprising computer program code that when executed by a computer, causes the computer to:
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analyze an image of a portion of text having at least one line; detect inter-line spacing and inter-word spacing across an area of the image; derive a quadrilateral shape based on the inter-line spacing and the inter-word spacing, the quadrilateral shape representing a deformation of the image from an undistorted image; and modify the image to perform perspective correction based on the derived quadrilateral Shape.
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10. An image processing apparatus comprising:
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means for analyzing an image of a portion of text, the image defining an area, and detecting inter-line spacing and inter-word spacing across the area of the image; means for deriving a quadrilateral shape, the quadrilateral shape representing a deformation of the image from an undistorted image based on the inter-line spacing and the inter-word spacing; and means for modifying the image to perform perspective correction based on the derived quadrilateral shape.
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Specification