Image processing apparatus and method, and non-transitory computer readable medium
AssigneeFUJIFILM Corporation
InventorYasutake TANAKA
Life of this patent
Estimating the term…
Abstract
There is provided an image processing apparatus, method, and operation program capable of appropriately removing an abnormal pixel even in a case where the abnormal pixel is present in a tailing region. An abnormal pixel removing section removes an abnormal pixel from an image in which tailing and the dot-shaped abnormal pixel are mixed every other line. The abnormal pixel removing section selects neighboring pixels from only odd lines or even lines including a line, in which a target pixel to be corrected is present, depending on whether or not the line in which the target pixel is present is an odd-numbered line in a sub-scanning direction, and performs processing for removing the abnormal pixel based on the selected neighboring pixels.
Claims10
An image processing apparatus that uses a scanning unit that performs scanning for image reading on an image carrier carrying image information by moving an optical head relative to the image carrier and that reads a one-dimensional line image in a main scanning direction line by line by performing reciprocating scanning, in which forward scanning and backward scanning are alternately repeated for each line in the main scanning direction, and reads a two-dimensional image by performing scanning in a sub-scanning direction perpendicular to the main scanning direction in combination with the reciprocating scanning, acquires the two-dimensional image from the scanning unit, and performs image processing on the two-dimensional image, the apparatus comprising:
- an abnormal pixel removing unit that removes a dot-shaped abnormal pixel present in the two-dimensional image based on neighboring pixels present around the abnormal pixel, and that selects the neighboring pixels from only at least one odd line including an odd line, in which a target pixel to be corrected in order to remove the abnormal pixel is present, in a case where a line in which the target pixel is present is an odd-numbered line in the sub-scanning direction, and selects the neighboring pixels from only at least one even line including an even line, in which the target pixel is present, in a case where a line in which the target pixel is present is an even-numbered line in the sub-scanning direction, and removes the abnormal pixel based on the selected neighboring pixels;
- and
- a tailing removing unit that removes stripe-shaped tailing, which occurs every other line due to the reciprocating scanning in the two-dimensional image and extends in the main scanning direction, from the two-dimensional image.
An image processing method in which a scanning unit, which performs scanning for image reading on an image carrier carrying image information by moving an optical head relative to the image carrier and which reads a one-dimensional line image in a main scanning direction line by line by performing reciprocating scanning, in which forward scanning and backward scanning are alternately repeated for each line in the main scanning direction, and reads a two-dimensional image by performing scanning in a sub-scanning direction perpendicular to the main scanning direction in combination with the reciprocating scanning, is used, the two-dimensional image is acquired from the scanning unit, and image processing is performed on the two-dimensional image, the method comprising:
- an abnormal pixel removing step of removing a dot-shaped abnormal pixel present in the two-dimensional image based on neighboring pixels present around the abnormal pixel, and of selecting the neighboring pixels from only at least one odd line including an odd line, in which a target pixel to be corrected in order to remove the abnormal pixel is present, in a case where a line in which the target pixel is present is an odd-numbered line in the sub-scanning direction, and of selecting the neighboring pixels from only at least one even line including an even line, in which the target pixel is present, in a case where a line in which the target pixel is present is an even-numbered line in the sub-scanning direction, and of removing the abnormal pixel based on the selected neighboring pixels;
- and
- a tailing removing step of removing stripe-shaped tailing, which occurs every other line due to the reciprocating scanning in the two-dimensional image and extends in the main scanning direction, from the two-dimensional image.
A non-transitory computer readable medium for storing a computer-executable program for execution of image processing that uses a scanning unit that performs scanning for image reading on an image carrier carrying image information by moving an optical head relative to the image carrier and that reads a one-dimensional line image in a main scanning direction line by line by performing reciprocating scanning, in which forward scanning and backward scanning are alternately repeated for each line in the main scanning direction, and reads a two-dimensional image by performing scanning in a sub-scanning direction perpendicular to the main scanning direction in combination with the reciprocating scanning, acquires the two-dimensional image from the scanning unit, and performs image processing on the two-dimensional image,
- wherein the computer-executable program includes:
- an abnormal pixel removing step of removing a dot-shaped abnormal pixel present in the two-dimensional image based on neighboring pixels present around the abnormal pixel, and of selecting the neighboring pixels from only at least one odd line including an odd line, in which a target pixel to be corrected in order to remove the abnormal pixel is present, in a case where a line in which the target pixel is present is an odd-numbered line in the sub-scanning direction, and of selecting the neighboring pixels from only at least one even line including an even line, in which the target pixel is present, in a case where a line in which the target pixel is present is an even-numbered line in the sub-scanning direction, and of removing the abnormal pixel based on the selected neighboring pixels;
- and
- a tailing removing step of removing stripe-shaped tailing, which occurs every other line due to the reciprocating scanning in the two-dimensional image and extends in the main scanning direction, from the two-dimensional image.
Dependencies are inferred from the claim text.