Image processing method, image processing device, image forming device and inkjet recording device
AssigneeFUJIFILM Corporation
InventorHiroyuki Shibata
Life of this patent
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Abstract
An image processing method includes: storing a threshold matrix for quantization processing of input image data, applying mask processing to an abnormal recording element based on abnormal recording element information, correcting a correspondence relationship between a recording element and a threshold such that processing of a pixel to be formed by the abnormal recording element subjected to mask processing is excluded and the continuity of a pattern of the threshold matrix is maintained, and performing quantization processing using a corrected threshold matrix.
Claims12
An image processing method comprising:
- a threshold matrix storage step of storing a threshold matrix used for quantization processing that converts input image data into image data having a gradation number less than a gradation number which the input image data has;
- an abnormal recording element information acquisition step of acquiring abnormal recording element information;
- a mask processing step of applying mask processing to an abnormal recording element based on the acquired abnormal recording element information;
- a threshold matrix correction step of correcting a correspondence relationship between a recording element and a threshold, such that processing of a pixel to be formed by the abnormal recording element subjected to the mask processing is excluded and continuity of a pattern of the threshold matrix is maintained;
- and
- a quantization processing step of performing quantization processing using the corrected threshold matrix.
An image processing device comprising:
- a threshold matrix storage unit configured to store a threshold matrix used for quantization processing that converts input image data into image data having a gradation number less than a gradation number which the input image data has;
- an abnormal recording element information acquisition unit configured to acquire abnormal recording element information;
- a mask processing unit configured to apply mask processing to an abnormal recording element based on the acquired abnormal recording element information;
- a threshold matrix correction unit configured to correct a correspondence relationship between a recording element and a threshold, such that processing of a pixel to be formed by the recording element subjected to the mask processing is excluded and continuity of a pattern of the threshold matrix is maintained;
- and
- a quantization processing unit configured to perform quantization processing using the corrected threshold matrix.
An image forming device comprising:
- an image processing unit including:
- a threshold matrix storage unit configured to store a threshold matrix used for quantization processing that converts input image data into image data having a gradation number less than a gradation number which the input image data has;
- an abnormal recording element information acquisition unit configured to acquire abnormal recording element information;
- a mask processing unit configured to apply mask processing to an abnormal recording element based on the acquired abnormal recording element information;
- a threshold matrix correction unit configured to correct a correspondence relationship between a recording element and a threshold, such that processing of a pixel to be formed by the recording element subjected to the mask processing is excluded and continuity of a pattern of the threshold matrix is maintained;
- and
- a quantization processing unit configured to perform quantization processing using the corrected threshold matrix;
- and
- an image forming unit configured to form an image on a medium based on the input image data subjected to the quantization processing.
Dependencies are inferred from the claim text.