Image forming system, image forming apparatus, terminal device, gradation characteristic measuring method, computer readable medium storing program and gradation characteristic measurement sheet

Abstract

A terminal device includes: a colorimetry unit that performs colorimetry on color values of respective measurement regions on a gradation characteristic measurement sheet where the plural measurement regions are formed in different densities; and a determination unit that determines identification information to identify the gradation characteristic measurement sheet based on a result of colorimetry of identification information measurement regions arranged to identify the gradation characteristic measurement sheet in a result of colorimetry by the colorimetry unit.

1 . A terminal device comprising:
 a colorimetry unit that performs colorimetry on color values of respective measurement regions on a gradation characteristic measurement sheet where the plurality of measurement regions are formed in different densities; and   a determination unit that determines identification information to identify the gradation characteristic measurement sheet based on a result of colorimetry of identification information measurement regions arranged to identify the gradation characteristic measurement sheet, in a result of colorimetry by the colorimetry unit.   
     
     
         2 . The terminal device according to  claim 1 , further comprising a storage unit that holds information indicating correspondence between an array of the identification information measurement regions and identification information indicated with the array,
 wherein the determination unit determines the identification information by using the information stored in the storage unit.   
     
     
         3 . The terminal device according to  claim 1 , wherein the identification information includes at least one of information to specify an image forming apparatus which has outputted the gradation characteristic measurement sheet, destination information, type information of the gradation characteristic measurement regions for gradation characteristic measurement, time information of time at which the gradation characteristic measurement sheet has been outputted, and information to specify a subject tray or a subject sheet to which gradation correction is to be applied. 
     
     
         4 . The terminal device according to  claim 2 , wherein the identification information includes at least one of information to specify an image forming apparatus which has outputted the gradation characteristic measurement sheet, destination information, type information of the gradation characteristic measurement regions for gradation characteristic measurement, time information of time at which the gradation characteristic measurement sheet has been outputted, and information to specify a subject tray or a subject sheet to which gradation correction is to be applied. 
     
     
         5 . An image forming apparatus comprising:
 a generation unit that generates identification information measurement region data in which measurement regions are arrayed based on identification information to identify a gradation characteristic measurement sheet for gradation characteristic measurement;   a combining unit that combines the identification information measurement region data generated by the generation unit with gradation characteristic measurement region data for gradation characteristic measurement; and   an image output unit that outputs the gradation characteristic measurement sheet for gradation characteristic measurement based on image data combined by the combining unit.   
     
     
         6 . The image forming apparatus according to  claim 5 , further comprising:
 a gradation correction data generation unit that generates gradation correction data for gradation correction processing based on colorimetric data of gradation characteristic measurement regions; and   a gradation correction unit that performs gradation correction processing on print data to be outputted to the image output unit, based on the gradation correction data generated by the gradation correction data generation unit.   
     
     
         7 . The image forming apparatus according to  claim 5 , wherein the identification information includes at least one of information to specify an image forming apparatus which has outputted the gradation characteristic measurement sheet, destination information, type information of the gradation characteristic measurement regions for gradation characteristic measurement, time information of time at which the gradation characteristic measurement sheet has been outputted, and information to specify a subject tray or a subject sheet to which gradation correction is to be applied. 
     
     
         8 . The image forming apparatus according to  claim 6 , wherein the identification information includes at least one of information to specify an image forming apparatus which has outputted the gradation characteristic measurement sheet, destination information, type information of the gradation characteristic measurement regions for gradation characteristic measurement, time information of time at which the gradation characteristic measurement sheet has been outputted, and information to specify a subject tray or a subject sheet to which gradation correction is to be applied. 
     
     
         9 . An image forming system comprising:
 a generation unit that generates identification information measurement region data in which measurement regions are arrayed based on identification information to identify a gradation characteristic measurement sheet for gradation characteristic measurement;   a combining unit that combines the identification information measurement region data generated by the generation unit with gradation characteristic measurement region data for gradation characteristic measurement;   an image output unit that outputs the gradation characteristic measurement sheet for gradation characteristic measurement based on image data combined by the combining unit;   a colorimetry unit that performs colorimetry on color values of respective measurement regions on the gradation characteristic measurement sheet outputted by the image output unit; and   a determination unit that determines identification information to identify the gradation characteristic measurement sheet based on a result of colorimetry of identification information measurement regions arranged to identify the gradation characteristic measurement sheet in a result of colorimetry by the colorimetry unit.   
     
     
         10 . A gradation characteristic measuring method comprising:
 performing colorimetry on color values of respective measurement regions on a gradation characteristic measurement sheet where the plurality of measurement regions are formed in different densities; and   determining identification information to identify the gradation characteristic measurement sheet based on a result of colorimetry of identification information measurement regions arranged to identify the gradation characteristic measurement sheet in a result of colorimetry.   
     
     
         11 . A computer readable medium storing a program causing a computer to execute a process for gradation characteristic measurement, the process comprising:
 performing colorimetry on color values of respective measurement regions on a gradation characteristic measurement sheet where the plurality of measurement regions are formed in different densities; and   determining identification information to identify the gradation characteristic measurement sheet based on a result of colorimetry of identification information measurement regions arranged to identify the gradation characteristic measurement sheet, in the result of colorimetry.   
     
     
         12 . A gradation characteristic measurement sheet in which a plurality of gradation characteristic measurement regions for gradation characteristic measurement and identification information measurement regions arrayed based on identification information to identify the gradation characteristic measurement sheet are formed.