Reading device, reading method, program, inspection device, and printing system
AssigneeFUJIFILM Corporation
InventorKanji NAGASHIMA
Life of this patent
Estimating the term…
Abstract
Provided are a reading device, a reading method, a program, an inspection device, and a printing system that can acquire preferred read data of a printed image for inspection or the like using the read data of the printed image. A reading device includes an image sensor, an imaging lens, a transmitted illumination device including a transmitted bright-field illumination device and a transmitted dark-field illumination device, and a transmitted illumination condition setting unit that sets transmitted illumination conditions according to a process performed on read data, and controls each of the transmitted bright-field illumination device and the transmitted dark-field illumination device according to transmitted illumination conditions.
Claims20
A reading device comprising:
- an image sensor that reads a printed image printed on a substrate and generates read data of the printed image;
- an imaging lens that forms an optical image of the printed image on the image sensor and has a defined visual field representing a range in which an illumination device is disposed such that illumination light is directly incident on the imaging lens;
- a transmitted illumination device that is disposed at a position facing a light-receiving surface of the image sensor and includes a transmitted bright-field illumination device which is disposed within a range of the visual field of the imaging lens and a transmitted dark-field illumination device which is disposed outside the range of the visual field of the imaging lens;
- a transmitted illumination condition setting unit that sets transmitted illumination conditions to be applied to the transmitted illumination device;
- and
- one or more first processors,
- wherein the transmitted illumination condition setting unit sets illumination conditions to be applied to the transmitted bright-field illumination device and sets illumination conditions to be applied to the transmitted dark-field illumination device, according to a process performed on the read data,
- the transmitted illumination condition setting unit defines two or more combinations of the illumination conditions of the transmitted bright-field illumination device and the illumination conditions of the transmitted dark-field illumination device, and sets the combinations of the illumination conditions of the transmitted bright-field illumination device and the illumination conditions of the transmitted dark-field illumination device according to reading conditions of the image sensor, and
- the one or more first processors control each of the transmitted bright-field illumination device and the transmitted dark-field illumination device according to the transmitted illumination conditions set by the transmitted illumination condition setting unit.
A reading method applied to a reading device including an image sensor that reads a printed image printed on a substrate and generates read data of the printed image, an imaging lens that forms an optical image of the printed image on the image sensor and has a defined visual field representing a range in which an illumination device is disposed such that illumination light is directly incident on the imaging lens, and a transmitted illumination device that is disposed at a position facing a light-receiving surface of the image sensor and includes a transmitted bright-field illumination device which is disposed within a range of the visual field of the imaging lens and a transmitted dark-field illumination device which is disposed outside the range of the visual field of the imaging lens, the reading method comprising:
- setting illumination conditions to be applied to the transmitted bright-field illumination device and setting illumination conditions to be applied to the transmitted dark-field illumination device, according to a process performed on the read data;
- defining two or more combinations of the illumination conditions of the transmitted bright-field illumination device and the illumination conditions of the transmitted dark-field illumination device, and setting the combinations of the illumination conditions of the transmitted bright-field illumination device and the illumination conditions of the transmitted dark-field illumination device according to reading conditions of the image sensor;
- emitting transmitted bright-field illumination light from the transmitted bright-field illumination device according to the illumination conditions of the transmitted bright-field illumination device;
- emitting transmitted dark-field illumination light from the transmitted dark-field illumination device according to the illumination conditions of the transmitted dark-field illumination device;
- and
- reading the printed image using the image sensor.
A non-transitory, computer-readable tangible recording medium on which a program is recorded, the program being applied to a reading device including an image sensor that reads a printed image printed on a substrate and generates read data of the printed image, an imaging lens that forms an optical image of the printed image on the image sensor and has a defined visual field representing a range in which an illumination device is disposed such that illumination light is directly incident on the imaging lens, and a transmitted illumination device that is disposed at a position facing a light-receiving surface of the image sensor and includes a transmitted bright-field illumination device which is disposed within a range of the visual field of the imaging lens and a transmitted dark-field illumination device which is disposed outside the range of the visual field of the imaging lens, the program causing a computer to implement:
- a function of setting illumination conditions to be applied to the transmitted bright-field illumination device and setting illumination conditions to be applied to the transmitted dark-field illumination device, according to a process performed on the read data;
- a function of defining two or more combinations of the illumination conditions of the transmitted bright-field illumination device and the illumination conditions of the transmitted dark-field illumination device and setting the combinations of the illumination conditions of the transmitted bright-field illumination device and the illumination conditions of the transmitted dark-field illumination device according to reading conditions of the image sensor;
- a function of emitting transmitted bright-field illumination light from the transmitted bright-field illumination device according to the illumination conditions of the transmitted bright-field illumination device;
- a function of emitting transmitted dark-field illumination light from the transmitted dark-field illumination device according to the illumination conditions of the transmitted dark-field illumination device;
- and
- a function of reading the printed image using the image sensor.
A reading device comprising:
- an image sensor that reads a printed image printed on a substrate and generates read data of the printed image;
- an imaging lens that forms an optical image of the printed image on the image sensor and has a defined visual field representing a range in which an illumination device is disposed such that illumination light is directly incident on the imaging lens;
- a transmitted illumination device that is disposed at a position facing a light-receiving surface of the image sensor and includes a light diffusion member and a switching member which switches between a proportion of light, which is incident on the light diffusion member and is emitted from within a range of the visual field of the imaging lens, to emitted light and a proportion of light, which is not incident on the light diffusion member and is emitted from outside the range of the visual field of the imaging lens, to the emitted light;
- a transmitted illumination condition setting unit that sets transmitted illumination conditions to be applied to the transmitted illumination device;
- and
- one or more first processors,
- wherein the transmitted illumination condition setting unit sets transmitted bright-field illumination conditions to be applied to transmitted bright-field illumination light which is emitted from within the range of the visual field of the imaging lens and sets transmitted dark-field illumination conditions to be applied to transmitted dark-field illumination light which is emitted from outside the range of the visual field of the imaging lens, according to a process performed on the read data, and
- the one or more first processors control each of the transmitted bright-field illumination light and the transmitted dark-field illumination light according to the transmitted illumination conditions set by the transmitted illumination condition setting unit.
Dependencies are inferred from the claim text.