Image processing apparatus, crease forming device, and folding device specifying the position of a folding line based on acquiring first image information and second image information
地域：
Tokyo
摘要
An image processing apparatus includes a processor configured to: acquire image information obtained by an image reading apparatus including an illumination unit having an uneven balance in an amount of light in a sub-scanning direction; and specify a position of a folding line in a sheet from the acquired image information. The acquiring by the processor includes acquiring first image information obtained by reading the sheet in a first state in which the folding line in the sheet is positioned in a direction intersecting the sub-scanning direction of the image reading apparatus, and second image information obtained by reading the sheet in a second state in which the sheet is directed to an opposite side to a side in the first state. The specifying by the processor includes specifying the position of the folding line in the sheet based on the first image information and the second image information.
說明書
This application is based on and claims priority under 35 USC 119 from Japanese Patent Application No. 2019-182813 filed Oct. 3, 2019.
The present disclosure relates to an image processing apparatus, a crease forming device, and a folding device.
An automatic crease forming device (hereinafter, simply referred to as a crease forming device) performs a process of forming a crease that is formed in a sheet to straightly fold the sheet at a desired position. An automatic folding device (hereinafter, simply referred to as a folding device) performs a process of folding sheets. In order to know whether a position of a crease where a sheet is creased or a position of a fold where a sheet is folded (also referred to as a folding position) is at a desired position, the sheet may be read by an image reading apparatus to detect and confirm the position of the crease or the position of the fold.
JP-A-2018-207398 discloses an image reading apparatus that includes a light receiving unit that receives reflected light from an original document, and a first light emitting unit and a second light emitting unit that are disposed upstream and downstream, respectively, with the light receiving unit interposed therebetween in a reading direction of the original document, and that compares a first image obtained by reading the original document in a state in which only the first light emitting unit emits light with a second image obtained by reading the original document in a state in which only the second light emitting unit emits light, thereby specifying a position of a fold of the original document.
權(quán)利要求
What is claimed is:1. An image processing apparatus comprising:a processor configured to:acquire image information obtained by an image reading apparatus including a light source emitting to a sheet an uneven balance in an amount of light in a sub-scanning direction, wherein the light source of the image reading apparatus is disposed underneath the sheet, wherein the light source emits to the sheet a different amount of light on a second side in the sub-scanning direction than that on a first side in the sub-scanning direction; and specify a position of a folding line in the sheet from the acquired image information, wherein the acquiring by the processor comprises acquiringfirst image information obtained by reading a surface of the sheet in a first state, using the light source, in which the folding line in the sheet is positioned in a direction intersecting the sub-scanning direction of the image reading apparatus, and an outer edge of the sheet faces toward a first main scanning direction perpendicular to the sub-scanning direction, and second image information obtained by rotating the sheet to a second state and reading the same surface of the sheet in the second state, in which the outer edge of the sheet faces toward a second main scanning direction that is opposite to the first main scanning direction, and the same surface of the sheet is read in the second state using the same light source as used in the first state, and the specifying by the processor comprises specifying the position of the folding line in the sheet based on the first image information and the second image information. 2. The image processing apparatus according to claim 1 , whereinthe first image information and the second image information are image information obtained by the image reading apparatus by moving the light source in the sub-scanning direction and receiving reflected light from the sheet. 3. The image processing apparatus according to claim 1 , whereinthe first state is a state in which a upper side of the sheet intersecting the folding line in the sheet is directed to one side, and the second state is a state in which the upper side of the sheet is directed to an opposite side to the one side. 4. The image processing apparatus according to claim 2 , whereinthe first state is a state in which a upper side of the sheet intersecting the folding line in the sheet is directed to one side, and the second state is a state in which the upper side of the sheet is directed to an opposite side to the one side. 5. The image processing apparatus according to claim 1 , whereinthe processor specifies the position of the folding line in the sheet based on a magnitude relation between brightness of the first image information and brightness of the second image information. 6. The image processing apparatus according to claim 2 , whereinthe processor specifies the position of the folding line in the sheet based on a magnitude relation between brightness of the first image information and brightness of the second image information. 7. The image processing apparatus according to claim 3 , whereinthe processor specifies the position of the folding line in the sheet based on a magnitude relation between brightness of the first image information and brightness of the second image information. 8. The image processing apparatus according to claim 4 , whereinthe processor specifies the position of the folding line in the sheet based on a magnitude relation between brightness of the first image information and brightness of the second image information. 9. The image processing apparatus according to claim 1 , whereinthe processor specifies, as the position of the folding line in the sheet, one of two positions adjacent to a first range or a second range in the sub-scanning direction based on a magnitude relation between brightness of the first image information and brightness of the second image information, the first range is a range in the first image information where brightness is equal to or greater than a predetermined value, and the second range is a range in the second image information where brightness is equal to or greater than the predetermined value. 10. The image processing apparatus according to claim 9 , whereinthe light source has a smaller amount of light on a second side in the sub-scanning direction than that on a first side in the sub-scanning direction, and when the brightness of the first image information is larger than the brightness of the second image information, the processor specifies, as the position of the folding line in the sheet, a position adjacent to the second side of the first range in the sub-scanning direction or a position adjacent to the first side of the second range in the sub-scanning direction. 11. The image processing apparatus according to claim 9 , whereinthe light source has a smaller amount of light on a second side in the sub-scanning direction than that on a first side in the sub-scanning direction, and when the brightness of the first image information is smaller than the brightness of the second image information, the processor specifies, as the position of the folding line in the sheet, a position adjacent to the first side of the first range in the sub-scanning direction or a position adjacent to the second side of the second range in the sub-scanning direction. 12. The image processing apparatus according to claim 9 , whereinthe light source has a larger amount of light on a second side in the sub-scanning direction than that on a first side in the sub-scanning direction, and when the brightness of the first image information is larger than the brightness of the second image information, the processor specifies, as the position of the folding line in the sheet, a position adjacent to the first side of the first range in the sub-scanning direction or a position adjacent to the second side of the second range in the sub-scanning direction. 13. The image processing apparatus according to claim 9 , whereinthe light source has a larger amount of light on a second side in the sub-scanning direction than that on a first side in the sub-scanning direction, and when the brightness of the first image information is smaller than the brightness of the second image information, the processor specifies, as the position of the folding line in the sheet, a position adjacent to the second side of the first range in the sub-scanning direction or a position adjacent to the first side of the second range in the sub-scanning direction. 14. The image processing apparatus according to claim 1 , wherein the folding line is a crease having one steeply inclined surface and one gently inclined surface, wherein a recess of the crease faces down to the light source. 15. The image processing apparatus according to claim 1 , wherein the folding line is a fold. 16. A crease forming device that changes a position where a crease is formed in a sheet based on the position of the crease in the sheet, which is specified by the image processing apparatus according to claim 14 . 17. A folding device that changes a folding position in a sheet based on the position of the fold of the sheet, which is specified by the image processing apparatus according to claim 15 . 18. An image processing method comprising:acquiring image information obtained by an image reading apparatus including a light source emitting to a sheet an uneven balance in an amount of light in a sub-scanning direction, wherein the light source of the image reading apparatus is disposed underneath the sheet, wherein the light source emits to the sheet a different amount of light on a second side in the sub-scanning direction than that on a first side in the sub-scanning direction; and specifying a position of a folding line in the sheet from the acquired image information, wherein the acquiring comprises acquiringfirst image information obtained by reading a surface of the sheet in a first state, using the light source, in which the folding line in the sheet is positioned in a direction intersecting the sub-scanning direction of the image reading apparatus, and an outer edge of the sheet faces toward a first main scanning direction perpendicular to the sub-scanning direction, and second image information obtained by rotating the sheet to a second state and reading the same surface of the sheet in the second state, in which the outer edge of the sheet faces toward a second main scanning direction that is opposite to the first main scanning direction, and the same surface of the sheet is read in the second state using the same light source as used in the first state, and the specifying comprises specifying the position of the folding line in the sheet based on the first image info nation and the second image information.
意見反饋
使用該功能遇到問題