Granted Patent B2

US 8,963,976 · App. 13/230,814 · Granted Feb 24, 2015

Abstract

Claims (16)

1. A method for correcting a linearity error in an electrophotographic device, the electrophotographic device processing data comprising a plurality of scan lines, each of the plurality of scan lines comprising a plurality of time-slices, the method comprising:

computing one or more time-slices based on one or more properties of the electrophotographic device;

adding a plurality of random numbers to the one or more time-slices; and

inserting the one or more time-slices in the data, the insertion being performed in a predefined order based on the addition of the plurality of random numbers to the one or more time-slices, wherein the insertion of the one or more time-slices at least partly corrects the linearity error in the electrophotographic device.

2. The method according to claim 1 , wherein the one or more time-slices is inserted in each of the plurality of scan lines.

3. The method according to claim 2 , wherein the predefined order of insertion varies with each of the plurality of scan lines.

4. The method of claim 1 , wherein the one or more time-slices correspond to one or more regions of the data, each of the one or more regions of the data comprising a predefined number of pels, and wherein the method further comprises storing the plurality of random numbers in a matrix, wherein a plurality of elements of the matrix are added to the one or more time-slices to be inserted in the one or more regions of the data, and selecting the plurality of elements of the matrix in such a way that a sum of the plurality of random numbers across each row is zero.

5. The method of claim 1 , wherein adding the plurality of random numbers to the one or more time-slices varies across at least one of a plurality of scan lines of the data and within a single scan line of data.

6. The computer program product of claim 5 , wherein the predefined order of insertion varies with each of the plurality of scan lines.

7. The method of claim 1 , wherein adding the plurality of random numbers to the one or more time-slices varies across a plurality of scan lines of the data and within a single scan line of data.

8. A computer program product for use with a computer, the computer program product comprising a computer usable medium having a computer readable program code embodied therein in a non-transitory manner for at least partly correcting a linearity error in an electrophotographic device, the electrophotographic device processing data comprising a plurality of scan lines, each of the plurality of scan lines comprising a plurality of time-slices, the computer readable program code performing:

computing one or more time-slices based on one or more properties of the electrophotographic device;

adding a plurality of random numbers to the one or more time-slices; and

inserting the one or more time-slices in the data, the insertion being performed in a predefined order based on the addition of the plurality of random numbers to the one or more time-slices, wherein the insertion of the one or more time-slices at least partly corrects the linearity error in the electrophotographic device.

9. The computer program product of claim 8 , wherein the one or more time-slices correspond to one or more regions of the data, each of the one or more regions of the data comprising a predefined number of pels, and wherein the computer program product includes instructions for storing the plurality of random numbers in a matrix, wherein a plurality of elements of the matrix are added to the one or more time-slices to be inserted in the one or more regions of the data, and selecting the plurality of elements of the matrix in such a way that a sum of the plurality of random numbers across each row is zero.

10. The computer program product of claim 8 , wherein the one or more time-slices is inserted in each of the plurality of scan lines.

Assignments (8)