Abstract: In a reading device, a light transmissive member has a front surface on which an original is placed. A peripheral member is adjacent to the light transmissive member, and includes a back surface in which a reference hole is formed. The reference hole includes a first edge and a second edge intersecting with each other. A reading sensor faces the back surface of the light transmissive member and the back surface of the peripheral member. The controller controls the reading sensor to read a reading range including the reference hole to obtain a read image, and determines a reference position in the reading range based on the read image. The reference position is determined to an intersection between the first edge and the second edge. The controller sets a reading start position based on the reference position.

Abstract: A reading apparatus, having a document placement table, a cover, a reader, and a controller, is provided. The cover has, on a facing surface thereof that faces the reader, a reference section having a first edge extending in a sub-scanning direction and a second edge extending in a main scanning direction, and a colored part on peripheries of the reference section. The colored part is colored along the first edge and along the second edge. The controller is configured to operate the reader to read the colored part and the peripheries of the colored part, detect a first position being a position of the first edge in the main scanning direction and a second position being a position of the second edge in the sub-scanning direction in an outcome of reading, and determine a reading range based on the first position and the second position.

Abstract: There is provided an image reading device in which a controller is configured to perform detecting, by executing an edge detection process, edge pixels from image data scanned by a reading device and stored in a storage, the edge pixels being pixels obtained by reading an edge of an original document. Then, it is determined whether a sequence of the detected edge pixels in a particular direction is interrupted. When interrupted, an expansion process is executed to increase the edge pixels in a particular range in a neighborhood of the detected edge pixels of the image data. Then, a particular process is performed on the image data using the edge pixels detected from the image data after the edge pixels are increased.

Abstract: There is provided an image reading device in which a controller is configured to perform detecting, by executing an edge detection process, edge pixels from image data scanned by a reading device and stored in a storage, the edge pixels being pixels obtained by reading an edge of an original document. Then, it is determined whether a sequence of the detected edge pixels in a particular direction is interrupted. When interrupted, an expansion process is executed to increase the edge pixels in a particular range in a neighborhood of the detected edge pixels of the image data. Then, a particular process is performed on the image data using the edge pixels detected from the image data after the edge pixels are increased.

Abstract: A reading device includes: a reader; and a controller. The reader is configured to read both of a sheet of paper and a card as an original. The controller is, when the card having four original corners is set as the original, configured to perform for implementing a card reading function: (a) reading; and (b) acquiring. The (a) reading reads the original with the reader to acquire original image data corresponding to an original image area having four corner regions. The (b) acquiring acquires edge information of a first original corner from the original image data to estimate a round shape of the first original corner using the edge information. The first original corner being one of the four original corners in the original.

Abstract: In a reading device, a light transmissive member has a front surface on which an original is placed. A peripheral member is adjacent to the light transmissive member, and includes a back surface in which a reference hole is formed. The reference hole includes a first edge and a second edge intersecting with each other. A reading sensor faces the back surface of the light transmissive member and the back surface of the peripheral member. The controller controls the reading sensor to read a reading range including the reference hole to obtain a read image, and determines a reference position in the reading range based on the read image. The reference position is determined to an intersection between the first edge and the second edge. The controller sets a reading start position based on the reference position.

Abstract: A reading device includes: a reader; and a controller. The reader is configured to read both of a sheet of paper and a card as an original. The controller is, when the card having four original corners is set as the original, configured to perform for implementing a card reading function: (a) reading; and (b) acquiring. The (a) reading reads the original with the reader to acquire original image data corresponding to an original image area having four corner regions. The (b) acquiring acquires edge information of a first original corner from the original image data to estimate a round shape of the first original corner using the edge information. The first original corner being one of the four original corners in the original.

Abstract: A controller executes area defining processing for defining a middle area and two side areas, and ending processing. In a case where the document leading edge extends parallel to a main scanning direction, the controller executes the ending processing for non-skewed document. In a case where the document leading edge does not extend parallel to the main scanning direction, the controller executes the ending processing for skewed document. In which, the controller determines, in the middle area and the side areas, first, second, and third change positions, respectively, at each of which a type of a target read image data line changes from document data to document cover data, determines, based on the first change position and the second change position, whether a document has a rectangular shape, and ends the reading operation based on the third change position and the determination result as to the document shape.

Abstract: An image processing apparatus has a color image, the image data being constituted by multiple pixels, each of the multiple pixels having a gradation value, and a controller, which is configured to generate a histogram of index values corresponding to brightness values of the multiple pixels constituting the image data, set an original threshold value based on the histogram which is referred to for binarization, detect a mound-shaped part, in the histogram, satisfying a particular condition, set an adjusting direction in which the original threshold value is to be adjusted, set the index value at a base on a particular direction side of a particular mound-shaped part which is one of mound-shaped parts existing on the adjusting direction side with respect to the original threshold value in the histogram as an adjusted threshold value, and apply a binarizing process to the image data using the adjusted threshold value.

Abstract: An image processing apparatus includes a controller configured to control an image scanner to generate scanned data by scanning an image recorded on a document sheet, calculate an edge intensity of each of pixels included in the scanned data, determine a binarization threshold from pixel values of particular pixels, the particular pixels being a part of the pixels included in the scanned data, each particular pixel having a density value higher than density values of surrounding pixels thereof and having an edge intensity equal to or higher than an edge threshold, and generate a binary image from the scanned data, using the binarization threshold.

Abstract: An image scanning apparatus includes a controller configured to perform a setting process to set a specific waiting time for a timer, based on a detected position of a document guide. The setting process includes, when the detected position of the document guide is a particular guide position for a first-size document sheet, setting a first waiting time as the specific waiting time for the timer, and when the detected position of the document guide is not the particular guide position, setting a second waiting time as the specific waiting time for the timer, the second waiting time being longer than the first waiting time.

Abstract: A controller executes area defining processing for defining a middle area and two side areas, and ending processing. In a case where the document leading edge extends parallel to a main scanning direction, the controller executes the ending processing for non-skewed document. In a case where the document leading edge does not extend parallel to the main scanning direction, the controller executes the ending processing for skewed document. In which, the controller determines, in the middle area and the side areas, first, second, and third change positions, respectively, at each of which a type of a target read image data line changes from document data to document cover data, determines, based on the first change position and the second change position, whether a document has a rectangular shape, and ends the reading operation based on the third change position and the determination result as to the document shape.

Abstract: An image processing apparatus has a storage configured to store image data representing a color image, the image data being constituted by multiple pixels, each of the multiple pixels having a gradation value, and a controller. The controller is configured to extract pixels, from among the multiple pixels, within a specific color range as target pixels, adjust the gradation values of the target pixels such that brightness values of the target pixels are lowered, generate a histogram of index values corresponding to quantities of the brightness values of the multiple pixels constituting the image data after the gradation values of the target pixels are adjusted, set a first threshold value based on the histogram as generated, and apply a binarizing process to the image data using the first threshold value.

Abstract: An image scanning apparatus includes a controller configured to perform a setting process to set a specific waiting time for a timer, based on a detected position of a document guide. The setting process includes, when the detected position of the document guide is a particular guide position for a first-size document sheet, setting a first waiting time as the specific waiting time for the timer, and when the detected position of the document guide is not the particular guide position, setting a second waiting time as the specific waiting time for the timer, the second waiting time being longer than the first waiting time.

Abstract: An image processing apparatus includes a controller configured to control an image scanner to generate scanned data by scanning an image recorded on a document sheet, calculate an edge intensity of each of pixels included in the scanned data, determine a binarization threshold from pixel values of particular pixels, the particular pixels being a part of the pixels included in the scanned data, each particular pixel having a density value higher than density values of surrounding pixels thereof and having an edge intensity equal to or higher than an edge threshold, and generate a binary image from the scanned data, using the binarization threshold.

Abstract: A first area, which includes a group of pixels with a first color, is specified. The first color corresponds to a color of an outline of a hole image in an image represented by image data. A second area corresponding to the hole image is determined. The second area is the first area larger than a first size when the first area is separated from four ends of the image. The second area is the first area larger than a second size when the first area is in contact with at least one of the four ends of the image. The second size is smaller than the first size.

Abstract: Image data representing an image are obtained. A quadrangular area, which is defined by a quadrangle including a group of pixels with a first color, is specified. The first color corresponds to a color of an outline of a hole image in the image. A hole orientation is specified based on positions of the group of pixels with respect to the quadrangular area. The hole orientation represents a direction that the outline of the hole image occupies. When the hole orientation is specified, a candidate area is specified by extending the quadrangular area in an extension direction. The extension direction corresponds to a direction opposite to the hole orientation and extending along one of sides of the quadrangular area.

Abstract: A first image data, binarized with a first threshold, represent a first image corresponding to a first portion of a specific image. A second image data, binarized with a second threshold different from the first threshold, represent a second image corresponding to a second portion of the specific image. A first area, which is extracted from the first image, includes pixels with a first color. The first color corresponding to a color of an outline of a hole image in the specific image. A second area, which is extracted from the second image, includes pixels with the first color. The first area and the second area are determined as a specific area corresponding to the hole image.

Abstract: An image processing apparatus has a color image, the image data being constituted by multiple pixels, each of the multiple pixels having a gradation value, and a controller, which is configured to generate a histogram of index values corresponding to brightness values of the multiple pixels constituting the image data, set an original threshold value based on the histogram which is referred to for binarization, detect a mound-shaped part, in the histogram, satisfying a particular condition, set an adjusting direction in which the original threshold value is to be adjusted, set the index value at a base on a particular direction side of a particular mound-shaped part which is one of mound-shaped parts existing on the adjusting direction side with respect to the original threshold value in the histogram as an adjusted threshold value, and apply a binarizing process to the image data using the adjusted threshold value.

Abstract: An image processing apparatus has a storage configured to store image data representing a color image, the image data being constituted by multiple pixels, each of the multiple pixels having a gradation value, and a controller. The controller is configured to extract pixels, from among the multiple pixels, within a specific color range as target pixels, adjust the gradation values of the target pixels such that brightness values of the target pixels are lowered, generate a histogram of index values corresponding to quantities of the brightness values of the multiple pixels constituting the image data after the gradation values of the target pixels are adjusted, set a first threshold value based on the histogram as generated, and apply a binarizing process to the image data using the first threshold value.