Image processing apparatus and folding device
An image processing apparatus includes a processor configured to: acquire image information obtained by reading a folded sheet with an image reading device in a state where the folded sheet is unfolded; acquire first and second distances in the image information, the first and second distances being distances from first and second positions to a predetermined reference of the sheet, respectively, the first and second positions on a folding line of the sheet being separated by a predetermined distance; and detect an inclination of the folding line of the sheet based on the first and second distances.
1. An image processing apparatus comprising:
a processor configured to:
acquire image information obtained by reading a folded sheet with an image reading device in a state where the folded sheet is unfolded;
acquire first and second distances in the image information, the first and second distances being distances from first and second positions to a predetermined reference of the sheet, respectively, the first and second positions on a folding line of the sheet being separated by a predetermined distance; and
detect an inclination of the folding line of the sheet based on the first and second distances.
2. The image processing apparatus according to claim 1 , wherein
the predetermined reference is first and second reference positions on a first side of the sheet, and
the processor is configured to:
acquire the first and second distances in the image information, the first and second distances being distances from the first and second positions to the first and second reference positions, respectively; and
detect the inclination of the folding line with respect to the first side of the sheet based on the first and second distances.
3. The image processing apparatus according to claim 2 , wherein
the first and second positions are located on second and third sides of the sheet, respectively, the second and third sides being opposite to each other,
the first and second reference positions are located at first and second ends of the first side, respectively,
a distance from the first position to the first reference position located on the second side which is closer to the first position than the third side is the first distance, and
a distance from the second position to the second reference position located on the third side which is closer to the second position than the second side is the second distance.
4. The image processing apparatus according to claim 3 , wherein the sheet includes a solid fill pattern at a folded position.
5. The image processing apparatus according to claim 3 , wherein the sheet includes information for guiding an orientation of the sheet when the sheet is read by the image reading device.
6. The image processing apparatus according to claim 2 , wherein the sheet includes a solid fill pattern at a folded position.
7. The image processing apparatus according to claim 6 , wherein the sheet includes information for guiding an orientation of the sheet when the sheet is read by the image reading device.
8. The image processing apparatus according to claim 2 , wherein the sheet includes information for guiding an orientation of the sheet when the sheet is read by the image reading device.
9. The image processing apparatus according to claim 1 , wherein
the predetermined reference is first and second reference images formed on the sheet, and
the processor is configured to:
acquire the first and second distances in the image information, the first and second distances being distances from the first and second positions to the first and second reference images, respectively; and
detect the inclination of the folding line with respect to the first and second reference images based on the first and second distances.
10. The image processing apparatus according to claim 2 , wherein
a position where the folding line intersects a virtual line extending from the first reference position on the first side of the sheet in a direction perpendicular to the first side is the first position,
a position where the folding line intersects a virtual line extending from the second reference position on the first side of the sheet in the direction perpendicular to the first side is the second position, and
the processor is configured to detect an inclination amount of the folding line with respect to the first side of the sheet based on a distance between the first and second reference positions.
11. The image processing apparatus according to claim 9 , wherein
the first and second reference images are formed with a gap between the first and second reference images, and
the processor is configured to detect the inclination of the folding line with respect to a virtual or existing connection line connecting the first and second reference images.
12. The image processing apparatus according to claim 11 , wherein the sheet includes a solid fill pattern at a folded position.
13. The image processing apparatus according to claim 11 , wherein the sheet includes information for guiding an orientation of the sheet when the sheet is read by the image reading device.
14. The image processing apparatus according to claim 11 , wherein
a position where the folding line intersects a virtual line extending from the first reference image in a direction perpendicular to the connection line is the first position,
a position where the folding line intersects a virtual line extending from the second reference image in the direction perpendicular to the connection line is the second position, and
the processor is configured to detect an inclination amount of the folding line with respect to the connection line based on a distance between the first and second reference images.
15. The image processing apparatus according to claim 9 , wherein the sheet includes a solid fill pattern at a folded position.
16. The image processing apparatus according to claim 9 , wherein the sheet includes information for guiding an orientation of the sheet when the sheet is read by the image reading device.
17. The image processing apparatus according to claim 1 , wherein the sheet includes a solid fill pattern at a folded position.
18. The image processing apparatus according to claim 17 , wherein the sheet includes information for guiding an orientation of the sheet when the sheet is read by the image reading device.
19. The image processing apparatus according to claim 1 , wherein the sheet includes information for guiding an orientation of the sheet when the sheet is read by the image reading device.
20. A folding device that forms a folding line on another sheet based on the inclination of the folding line detected by the image processing apparatus according to claim 1 such that an extending direction of the folding line of the another sheet changes when folding the another sheet.