Image processing method, program, image processing apparatus, and image forming system
AssigneeRicoh Company, Ltd.
InventorsShigetaka Sakakibara, Masakazu Yoshida, Masanori Hirano
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Abstract
A disclosed image processing method is for generating and processing image data to be sent to an image forming apparatus including a recording head for ejecting droplets of a recording liquid, the image forming apparatus forming an image on paper based on input data. The image processing method includes: color space conversion processing upon converting input data to color space values for the image forming apparatus in accordance with a specified density or color space conversion processing upon converting input data to color space values for the image forming apparatus in accordance with characteristics regarding permeability of the paper to a coloring agent.
Claims16
An image processing method for generating and processing image data to be sent to an image forming apparatus including a recording head for ejecting droplets of a recording liquid, the image forming apparatus forming an image on paper based on input data, the image processing method comprising:
- color space conversion processing upon converting input data to color space values for the image forming apparatus in accordance with a specified density,
- wherein a table of color space conversion processing is used as a standard and has different gradation characteristics in each of objects constituting image data to be output and table values so as not to cause reverse gradations,
- wherein the table values from the table of color space conversion processing are multiplied by a quadratic coefficient K so as to perform color space conversion processing, and
- wherein if an amount of ink attachment A of a maximum value in each hue is more than an optimal amount of ink attachment B relative to the specified density, the quadratic coefficient K is calculated by performing an arithmetical operation of K=B/A, and the quadratic coefficient K is not multiplied if A is less than or equal to B.
An image processing method for generating and processing image data to be sent to an image forming apparatus including a recording head for ejecting droplets of a recording liquid, the image forming apparatus forming an image on paper based on input data, the image processing method comprising:
- color space conversion processing upon converting input data to color space values for the image forming apparatus in accordance with characteristics regarding permeability of the paper to a coloring agent,
- wherein a table of color space conversion processing is used as a standard and has different gradation characteristics in each of objects constituting image data to be output and table values so as not to cause reverse gradations,
- wherein values from the table of color space conversion processing are multiplied by a quadratic coefficient K so as to perform color space conversion processing, and
- wherein if an amount of ink attachment A of a maximum value in each hue is more than an optimal amount of ink attachment B relative to a specified density, the quadratic coefficient K is calculated by performing an arithmetical operation of K=B/A, and the quadratic coefficient K is not multiplied if A is less than or equal to B.
A computer-readable medium tangibly embodying a program of instructions which, when executed by a computer, causes the computer to perform a process for generating image data to be sent to an image forming apparatus including a recording head for ejecting droplets of a recording liquid, the image forming apparatus forming an image based on input data, the process comprising:
- color space conversion processing upon converting input data to color space values for the image forming apparatus in accordance with a specified density,
- wherein a table of color space conversion processing is used as a standard and has different gradation characteristics in each of objects constituting image data to be output and table values so as not to cause reverse gradations,
- wherein values from the table of color space conversion processing are multiplied by a quadratic coefficient K so as to perform color space conversion processing, and
- wherein if an amount of ink attachment A of a maximum value in each hue is more than an optimal amount of ink attachment B relative to the specified density, the quadratic coefficient K is calculated by performing an arithmetical operation of K=B/A, and the quadratic coefficient K is not multiplied if A is less than or equal to B.
Dependencies are inferred from the claim text.