Abstract: An image processing apparatus includes a receiving unit that receives a display request for displaying a preview image of gradation-processed image data, and a preview magnification indicative of a display magnification of the preview image. An image processing unit performs a first magnification-altering process on the gradation-processed image data performs the gradation process based on the image quality mode if the preview magnification is lower than a present magnification and the gradation process based on the image quality mode is such that the gradation-processed image data does not express halftone, as well as if the preview magnification is higher than the present magnification thereby obtaining processed image data. A display unit creates and displays the preview image based on the processed image data.

Abstract: An image output apparatus includes a receiving unit that receives first information from a first radio contact element that performs a close-range radio contact; an image processing unit that forms image data of an image to be output from the first information; and an image output unit that outputs the image to an output medium from the image data.

Abstract: An image output apparatus includes a receiving unit that receives first information from a first radio contact element that performs a close-range radio contact; an image processing unit that forms image data of an image to be output from the first information; and an image output unit that outputs the image to an output medium from the image data.

Abstract: The image-processing device comprises a quantization threshold produce unit producing quantization threshold values corresponding to each pixel of multivalued image data according to a dither threshold matrix, a random dither quantize unit quantizing the multivalued image data in multivalues by a random dither process using the quantization threshold values so as to output quantized data, and a resolution convert binarize unit converting the quantized data into binary image data having a resolution higher than that of the multivalued image data. The resolution convert binarize unit determines the number of dot-on pixels to be output in a plural-pixel field of the binary image data according to the quantized data value of a pixel being processed of the multivalued image data. The plural-pixel field corresponds to the pixel.

Abstract: An image processing method of quantizing multi-tone image data by an error diffusion method, includes the steps of a) detecting change of the image data; and b) oscillating cyclically in image space a threshold for the quantization in an oscillation range controlled according to the detection result of the step a).

Abstract: An image processing apparatus generates color signals corresponding to respective color materials for forming a color image using a grayscale color material for at least one of a plurality of colors based on image data. A color converting unit generates a color signal corresponding to each of the color materials from the image data. A feature detecting unit detects a feature of an image from the color signal corresponding to the grayscale color material generated by the color converting unit. A correcting unit corrects a color signal corresponding to the grayscale color material based on the feature of the image detected by the feature detecting unit.

Abstract: An image processing method of quantizing multi-tone image data by an error diffusion method, includes the steps of a) detecting change of the image data; and b) oscillating cyclically in image space a threshold for the quantization in an oscillation range controlled according to the detection result of the step a).

Abstract: An image forming method includes the steps of a) multi-level quantizing a multi-tone image by an error diffusion method, and b) representing each pixel of the thus-quantized image having a quantized level higher than 0 using a dot which is larger as the quantized level thereof is higher. Occurrence of dots having a specific size is repressed in a specific shade region relating to the dots.

Abstract: An image processing method of quantizing multi-tone image data by an error diffusion method, includes the steps of a) detecting change of the image data; and b) oscillating cyclically in image space a threshold for the quantization in an oscillation range controlled according to the detection result of the step a).

Abstract: An image processing method of quantizing multi-tone image data by an error diffusion method, includes the steps of a) detecting change of the image data; and b) oscillating cyclically in image space a threshold for the quantization in an oscillation range controlled according to the detection result of the step a).

Abstract: An image forming apparatus has a color converter, a BG/UCR processor, a Bk/Lk generator, and a halftone processor. The cyan, the black, and the magenta are halftone screens having substantially equal frequencies and angle differences therebetween each set at approximately 30 degree. The light black is a halftone screen, and the light black and the black have a frequency ratio of 1.0 to 1.2, which is the ratio of the higher one of the frequencies of the light black and the black to the lower one thereof, and have the angle difference of approximately 45 degrees.

Abstract: An image output apparatus includes a receiving unit that receives first information from a first radio contact element that performs a close-range radio contact; an image processing unit that forms image data of an image to be output from the first information; and an image output unit that outputs the image to an output medium from the image data.

Abstract: An image processing apparatus has a first information addition unit configured to add to image data information related to image processing of the image data according to a first addition method as first information, and a second information addition unit configured to add the information to the image data according to a second addition method different from the first information addition method as second information. At least one of the first and the second information added is not lost even when an image processing is performed with respect to the image data.

Abstract: An image processing apparatus includes an image attribute determining unit that determines an image attribute of an image data, an object dissolving unit that dissolves the image data into a plurality of objects based on the image attribute, and an object describing unit that describes the objects in predetermined formats and converts the objects into a file of a predetermined file format. The object describing unit describes an object having a predetermined image attribute among the objects by associating an additional object representing information on the predetermined image attribute with the object.

Abstract: A scanning unit reads an original color image and outputs an rgb signal of the color image. A scanner &ggr; correction unit that converts the rgb signal from the scanning unit into an RGB signal that is a density signal. A color converting unit converts the RGB signal into a CM signal. An edge amount calculating unit calculates an edge amount from the CM signal. A filter processing unit performs an adaptive filtering process for the RGB signal based on the edge amount.

Abstract: The image-processing device comprises a quantization threshold produce unit producing quantization threshold values corresponding to each pixel of multivalued image data according to a dither threshold matrix, a random dither quantize unit quantizing the multivalued image data in multivalues by a random dither process using the quantization threshold values so as to output quantized data, and a resolution convert binarize unit converting the quantized data into binary image data having a resolution higher than that of the multivalued image data. The resolution convert binarize unit determines the number of dot-on pixels to be output in a plural-pixel field of the binary image data according to the quantized data value of a pixel being processed of the multivalued image data. The plural-pixel field corresponds to the pixel.