Image processing apparatus, image forming system, and image forming apparatus for correcting pixel density

An image forming apparatus comprising:

• an image holder;
• a charging member configured to charge a surface of the image holder;
• a latent image forming device configured to form a latent image on the charged surface of the image holder;
• a developing device configured to develop the latent image on the surface of the image holder into a visible image with a developer;
• a transferring device configured to transfer the visible image on the surface of the image holder onto a medium;
• a fixing device configured to fix the visible image transferred onto the medium on the medium;
• at least one processor;
• an acquisition unit, implemented by the at least one processor, configured to acquire first image information which is image information configured of a plurality of pixels and which includes density information for each pixel;
• a first correction unit, implemented by the at least one processor, configured to correct pixel density based on the first image information such that no image failure due to developing failure occurs due to developing failure in an area of a boundary between a high-density section and a low-density section;
• a storage configured to store image information obtained after the first correction unit performs the correction as second image information;
• a second correction unit, implemented by the at least one processor, configured to perform a reverse correction so as to cancel the correction by the first correction unit based on density of a pixel of the second image information in a state in which the first image information is removed;
• a display configured to display an image on a display section based on third image information which is image information obtained after the second correction unit performs the reverse correction;
• a generation unit, implemented by the at least one processor, configured to generate print information based on the second image information;
• and
• a controller, implemented by the at least one processor, configured to control the latent image forming device based on the print information.

An image processing apparatus comprising:

• at least one processor;
• an acquisition unit, implemented by the at least one processor, configured to acquire first image information which is image information configured of a plurality of pixels and which includes density information for each pixel;
• a first correction unit, implemented by the at least one processor, configured to correct pixel density based on the first image information such that no image failure occurs due to developing failure;
• a first boundary detecting unit, implemented by the at least one processor, configured to detect a pixel on a boundary in a scanning direction on which density is changed between a high-density pixel and a low-density pixel of which density is lower than the high-density pixel in a preset scanning direction based on the first image information,
• a first storage configured to store image information obtained after the first correction unit performs the correction as second image information;
• a second correction unit, implemented by the at least one processor, configured to perform a reverse correction so as to cancel the correction by the first correction unit based on density of a pixel of the second image information in a state in which the first image information is removed;
• a display configured to display an image on a display section based on third image information which is image information obtained after the second correction unit performs the reverse correction;
• and
• a transmission unit, implemented by the at least one processor, configured to transmit the second image information to an image forming apparatus,
• wherein, the first correction unit is further configured to, in a case where developing failure occurs in a preset number of pixels in the scanning direction with a boundary pixel in the scanning direction as a reference, correct the density of the pixel on which the developing failure occurs and add a density correction amount for each pixel to be corrected, and
• wherein the second correction unit is further configured to subtract a correction amount corresponding to the correction amount, which is added by the first correction unit, based on the pixel density of the second image information, and perform the reverse correction.