Abstract: Read image data is divided into a plurality of regions, and a histogram is generated and edges are counted for each region. Blank page detection is performed based on a variance value computed from the histogram of each region. Also, the variance between regions is computed from the edge count of each region, and blank page detection is performed according to the amount of variance. It is then determined whether the document is blank or content based on the result of detection by histogram and the result of detection by edge count.

Abstract: In a case where a background removal level is a level for removing a background, monochrome image data is generated based on color image data and then background removal processing is applied to the generated monochrome image data. In a case where the background removal level is a level for not removing the background, the background removal processing is applied to color image data and then monochrome image data is generated based on the image data having underdone the background removal processing.

Abstract: An image processing apparatus detects an edge from image data and generates edge data indicating a result of the detection, obtains a variance value of the generated edge data, and determines that the image data is data with print information when the obtained variance of the edge data is equal to or larger than a threshold and determines that the image data is data without print information when the variance is smaller than the threshold value.

Abstract: An image processing apparatus which reads an original to generate monochrome image data, comprises a determination unit configured to determine which of a first instruction to read the original using RGB sensors or a second instruction to read the original using a BW sensor is input; a reading unit configured to read the original using the RGB sensors when the determination unit determined that the first instruction is input, and read the original using the BW sensor when the determination unit determined that the second instruction is input; and a generation unit configured to generate monochrome image data by reading the original by the reading unit using the respective sensors.

Abstract: In a case where a background removal level is a level for removing a background, monochrome image data is generated based on color image data and then background removal processing is applied to the generated monochrome image data. In a case where the background removal level is a level for not removing the background, the background removal processing is applied to color image data and then monochrome image data is generated based on the image data having underdone the background removal processing.

Abstract: An image processing apparatus detects an edge from image data and generates edge data indicating a result of the detection, obtains a variance value of the generated edge data, and determines that the image data is data without print information when the obtained variance value of the edge data is equal to or larger than a threshold value and determines that the image data is data with print information when the variance value is smaller than the threshold value.

Abstract: An image processing apparatus which reads an original to generate monochrome image data, comprises a determination unit configured to determine which of a first instruction to read the original using RGB sensors or a second instruction to read the original using a BW sensor is input; a reading unit configured to read the original using the RGB sensors when the determination unit determined that the first instruction is input, and read the original using the BW sensor when the determination unit determined that the second instruction is input; and a generation unit configured to generate monochrome image data by reading the original by the reading unit using the respective sensors.