Detecting a folded page in a digital image of a scanned document

A computer implemented method for detecting a folded page in a digital image, the method comprising:

• scanning, by a document scanning device, a document to generate a digital image of that document;
• and
• a processor executing machine readable program instructions which, when executed, configure the processor to:
• receive the digital image from the document scanning device;
• divide the digital image vertically into a plurality of vertical segments and then dividing the vertical segments into a plurality of horizontal segments;
• generate, for each horizontal segment, a horizontal edge profile by summing values of pixels in each column of a horizontal edge to obtain a single row matrix;
• generate, for each vertical segment, a vertical edge profile by summing values of pixels in each row of a vertical edge to obtain a single column matrix;
• determine, based on an amount of 2-D cross correlation between the horizontal edge profile and the vertical edge profile generated for each image segment, whether a page fold exists in the retrieved digital image;
• and
• in response to the page fold existing in the digital image, communicate a message to a display device that the page fold has been detected.

A system for detecting a folded page in a digital image, the system comprising:

• a document scanner to generate a digital image of a document;
• and
• a processor executing machine readable program instructions which, when executed, configure the processor to:
• receive the digital image from the document scanner;
• divide the digital image vertically into a plurality of vertical segments and then dividing the vertical segments into a plurality of horizontal segments;
• generate, for each horizontal segment, a horizontal edge profile by summing values of pixels in each column of a horizontal edge to obtain a single row matrix;
• generate, for each vertical segment, a vertical edge profile by summing values of pixels in each row of a vertical edge to obtain a single column matrix;
• determine, based on an amount of 2-D cross correlation between the horizontal edge profile and the vertical edge profile generated for each image segment, whether a page fold exists in the digital image;
• and
• in response to the page fold existing in the digital image, communicate a message to a display device that the page fold has been detected.

A computer implemented method for detecting a folded page in a digital image, the method comprising:

• scanning, by a document scanning device, a document to generate a digital image of that document;
• and
• a processor executing machine readable program instructions which, when executed, configure the processor to:
• receive the digital image from the document scanning device;
• divide the digital image horizontally into a plurality of horizontal segments and then dividing the horizontal segments into a plurality of vertical segments;
• generate, for each horizontal segment, a horizontal edge profile by summing values of pixels in each column of a horizontal edge to obtain a single row matrix;
• generate, for each vertical segment, a vertical edge profile by summing values of pixels in each row of a vertical edge to obtain a single column matrix;
• determine, based on an amount of 2-D cross correlation between the horizontal edge profile and the vertical edge profile generated for each image segment, whether a page fold exists in the digital image;
• and
• in response to the page fold existing in the digital image, communicate a message to a display device that the page fold has been detected.

A system for detecting a folded page in a digital image, the system comprising:

• a document scanner to generate a digital image of a document;
• and
• a processor executing machine readable instructions which, when executed, configure the processor to:
• receive the digital image from the document scanner;
• divide the digital image horizontally into a plurality of horizontal segments and then dividing the horizontal segments into a plurality of vertical segments;
• generate, for each horizontal segment, a horizontal edge profile by summing values of pixels in each column of a horizontal edge to obtain a single row matrix;
• generate, for each vertical segment, a vertical edge profile by summing values of pixels in each row of a vertical edge to obtain a single column matrix;
• determine, based on an amount of 2-D cross correlation between the horizontal edge profile and the vertical edge profile generated for each image segment, whether a page fold exists in the digital image;
• and
• in response to the page fold existing in the digital image, communicate a message to a display device that the page fold has been detected.