Color Image Processing Device and Color Image Processing Method

Abstract

A color image processing device includes an acquiring unit that acquires sample values of an original document at a prescribed cycle from a plurality of line sensors provided in parallel with a main scanning direction at a prescribed interval between one another, a storage unit having a capacity that stores the sample values for a prescribed number of samplings and a transferring unit that transfers relatively the original document and sampling positions of the line sensors. A correction unit corrects to carry out a gap correction process for correcting a gap of the sampling positions of each of the line sensors in accordance with the sample values stored in the storage unit and an instructing unit instructs the transferring unit. In accordance with a rate of magnification for scanning the original document and the capacity of the storage unit, the instructing unit determines whether the gap correction process according to the rate of magnification can be carried out. When the gap correction process can be carried out, the instructing unit instructs the transferring unit to transfer at a correction speed so that a sample value to be used for the gap correction process can be acquired.

1 - 20 . (canceled) 
   
   
       21 . A color image processing device, comprising:
 means for acquiring sample values of an original document at a prescribed cycle from a plurality of line sensors provided in parallel with a main scanning direction at a prescribed interval between one another;   means for storing having a capacity for storing the sample values for a prescribed number of samplings;   means for transferring relatively the original document and sampling positions of the line sensors;   means for correcting to carry out a gap correction process for correcting a gap of the sampling positions of each of the line sensors in accordance with the sample values stored in the means for storing;   means for instructing the means for transferring, wherein in accordance with a rate of magnification for scanning the original document and the capacity of the means for storing, the means for instructing determines whether the gap correction process according to the rate of magnification can be carried out, and when the gap correction process can be carried out, the means for instructing instructs the means for transferring to transfer at a correction speed so that a sample value to be used for the gap correction process can be acquired, and   the means for instructing determines the correction speed in accordance with the capacity of the means for storing and the rate of magnification and instructs the means for transferring to transfer at the correction speed.   
   
   
       22 . The color image processing device according to  claim 21 , further comprising:
 means for holding a prescribed rate of magnification to determine whether the gap correction process can be carried out,   wherein the prescribed rate of magnification is calculated in accordance with a number of samplings necessary for carrying out the gap correction process according to the rate of magnification, and the capacity of the means for storing.   
   
   
       23 . A color image processing device, comprising:
 means for acquiring sample values of an original document at a prescribed cycle from a plurality of line sensors provided in parallel with a main scanning direction at a prescribed interval between one another;   means for storing having a capacity for storing the sample values for a prescribed number of samplings;   means for transferring relatively the original document and sampling positions of the line sensors;   means for correcting a gap of the sampling positions of each of the line sensors in accordance with a sample value acquired by scanning the original document at a speed calculated by dividing a transferring speed determined according to a rate of magnification for scanning the original document by a prescribed division number; and   means for calculating the division number in accordance with the capacity of the means for storing divided by the rate of magnification.   
   
   
       24 . A color image processing method, comprising:
 determining in accordance with a rate of magnification for scanning an original document and a capacity of a storage unit that stores sample values output from a plurality of line sensors, whether a gap correction process for correcting a gap according to the rate of magnification can be carried out;   transferring relatively the original document and sampling positions of the line sensors at a correction speed capable of acquiring sample values to be used in the gap correction process when the gap correction process can be carried out;   determining the correction speed in accordance with the capacity of the means for storing and the rate of magnification; and   acquiring the sample values of the original document at a prescribed cycle from the plurality of line sensors provided in parallel with a main scanning direction at a prescribed interval between one another while relatively transferring the original document and the sampling positions of the line sensors.   
   
   
       25 . The color image processing method according to  claim 24 , wherein at the step of transferring, when the rate of magnification is lower than a prescribed rate of magnification, the original document and the sampling positions of the line sensors are transferred relatively at the correction speed, and when the rate of magnification is the prescribed rate of magnification or higher, the original document and the sampling positions of the line sensors are transferred relatively at a speed different from the correction speed. 
   
   
       26 . A color image processing method, comprising:
 calculating a division number in accordance with a capacity of a storage unit that stores sample values output from a plurality of line sensors divided by a rate of magnification for scanning an original document;   transferring relatively the original document and sampling positions of the line sensors at a speed calculated by dividing a transferring speed determined according to the rate of magnification for scanning the original document by the division number;   acquiring a sample value of the original document at a prescribed cycle from the plurality of line sensors provided in parallel to a main scanning direction at a prescribed interval between one another while relatively transferring the original document and the sampling positions of the line sensors; and   correcting a gap of the sampling positions of each of the line sensors in accordance with the acquired sample value.   
   
   
       27 . A color image processing device, comprising:
 an acquiring unit that acquires sample values of an original document at a prescribed cycle from a plurality of line sensors provided in parallel with a main scanning direction at a prescribed interval between one another;   a storage unit having a capacity that stores the sample values for a prescribed number of samplings;   a transferring unit that transfers relatively the original document and sampling positions of the line sensors;   a correction unit that corrects to carry out a gap correction process for correcting a gap of the sampling positions of each of the line sensors in accordance with the sample values stored in the storage unit; and   an instructing unit that instructs the transferring unit, wherein in accordance with a rate of magnification for scanning the original document and the capacity of the storage unit, the instructing unit determines whether the gap correction process according to the rate of magnification can be carried out, and when the gap correction process can be carried out, the instructing unit instructs the transferring unit to transfer at a correction speed so that a sample value to be used for the gap correction process can be acquired, and   the instructing unit determines the correction speed in accordance with the capacity of the storage unit and the rate of magnification and instructs the transferring unit to transfer at the correction speed.