Abstract: Data for use in specifying an image to be registered and data indicative of processing contents to be executed are listed in list structure and registered in a "reference list to image storage unit" and a "reference list to processing-content storage unit," respectively. The aggregate area thus listed is subordinated to another aggregate area. When image processing and output are performed and produced, an aggregate area is designated and the processing contents are applied to the image registered in the aggregate area. Even a low-order aggregate area is processed in accordance with the listed contents of the high-order aggregate area.

Abstract: A color image forming device produces a good image form, superior in color and gradation reproduction, and little over-enhancement in sharpness during generation duplicating. The device has an image processing parameter storage unit that stores parameters for processing which correspond to original document modes in respective processing blocks. An image processing parameter detector detects the original document mode, and provides the mode to the respective components as an original document mode directive TAG. When generation duplicating is designated, the generation duplicating mode corresponding to the set original document mode is set, and various parameter settings are indicated corresponding to the set generation duplicating mode in the image processing parameter storage unit. By such, the operation in each image processing module is converted to the set generation duplicating mode.

Abstract: An original image 402, conversion images 404a-404c provided by executing gamut compression systems, and a mix percentage scale 406 are displayed on a display. The user can click on any one of the conversion images 404a-404c for specifying a user-adjusted image 403. Further, when the user clicks on the mix percentage scale 406, the conversion images 404a-404c are mixed in response to the point on which the user clicks (point 406p), and the result is specified as the user-adjusted image 403.

Abstract: A state transition display window displays a hue circle and a number of setting points corresponding to respective color adjustment levels. As the user makes color adjustments, a history of the color adjustments is displayed in the form of arrows connecting related setting points. If the user specifies two setting points, images corresponding to setting point located on the line connecting the two specified setting points are displayed on an image display subwindow. A current image and six images adjacent thereto are displayed in a 6 near images display window.

Abstract: An image-area identifying system for a color image processing apparatus comprises: image area identifying means for identifying a character area or a half-tone image area by using characteristic values of pixels in each pixel block of an image area; hue determining means for determining, every pixel, hue of received color image data to produce a necessary color switch signal or an unnecessary color switch signal; and data reset means for resetting unnecessary image data on the basis of the results of the block-basis area identifying determination by the image area identifying means and the pixel-basis hue determination by the hue determining means.

Abstract: The present invention provides a color image forming apparatus for forming a color image using signals for coloring materials for yellow, magenta, cyan and black, comprises black amount detection means for detecting a signal corresponding to a black amount in each pixel, operation means for performing an operation on the detected signal in a scope of the pixel to be processed and its neighbor, and adjustment means for adjusting a coefficient for a filtering process on each color signal of a coloring material for the pixel to be processed based on a signal obtained by said operation.

Abstract: A method for under-color removal in a color image forming apparatus comprises color conversion means for converting separated color signals into first color output signals, first black generation means for calculating first black output signal based on the maximum and minimum values of the first color output signals obtained by the color conversion means, means for performing under-color removal to calculate second color output signals by correcting the first color output signals converted by the color conversion means based on the first black output signal generated by the first black generation means and then removing under-color values from the first color output signals, black amount correction means for calculating second black output signal by correcting the first black output signal obtained by the first black production means, and chroma correction means for correcting the second color output signals obtained by the means for performing under-color removal based on the second black output signal obtai

Abstract: A mono color image outputting system for an image processing apparatus applies a color correction separated color signals in the input section converts them into recording signals of color material, before outputting a color image. In the mono color outputting system, a gradation property of value data in the input section is linearly compressed to correspond to a gradation property of value data in the output section.

Abstract: A ground detection means 10 for detecting the ground level of a document and a data correction means 11 for calculating correction data based on the detected ground level are provided. The ground level of the document is detected by prescanning and the correction data is calculated therefrom so that parameters of color conversion means 2, 3 are changed by the correction data. The correction data is set by approximating the detected ground level with a linear function. As a result of the above construction, the correction data is generated easily to thereby remove ground fog and exclude back-side images of the document. In addition, if the ground level is detected by a lightness signal L* and corrected by the lightness signal L* or a color-separated signal BGR, the correction can be achieved by correcting the parameters of a matrix that converts the color-separated signals B, G, R to a system value (L*a*b*) signal.

Abstract: A mono color image outputting system for an image processing apparatus applies a color correction separated color signals in the input section converts them into recording signals of color material, before outputting a color image. In the mono color outputting system, a gradation property of value data in the input section is linearly compressed to correspond to a gradation property of value data in the output section.

Abstract: A color converter capable of conversions between various kinds of color signals appropriate for use over a network (i.e., RGB signals, various luminance/chromaticity separated signals that are expressed by linear transformations of said RGB signals, and CIE LAB signals, which signals may or may not be gamma-corrected) and the internal color signals of devices connected to the network can be realized by rewriting associated coefficients and constants using the same circuit. Accurate color conversions can always be accomplished with an inexpensive system layout.

Abstract: A gray balance control system for reproducing original images. An optical signal is separated into a plurality of separated color signals, gray balance conversion data for each of the colors of the separated color signals is stored in a memory circuit, and an equivalent neutral density conversion is performed on the plurality of separated color signals by converting the color signals to gray balanced color signals in accordance with the gray balance conversion data. Finally, the gray balanced color signals are converted into print signals for coloring materials.

Abstract: In a picture forming apparatus for reproducing original images, an image processing device separates a signal corresponding to an original image into a plurality of separated color signals, an image converter converts the color signals into recording signals wherein each of the recording signals corresponds to a different color of coloring material used by the picture forming apparatus to reproduce the original image, a determining circuit determines the minimum value of the recording signals, and a color removal circuit performs under color removal on each of the recording signals in accordance with the determined minimum value.

Abstract: A novel composite with improved mechanical properties is obtained by blending a gypsum and/or calcium sulfite with a polyolefin onto which acrylic acid was graft-polymerized.A polyolefin which is not graft-polymerized can optionally be blended in the composite.

Abstract: A novel composite is disclosed which comprises a specific metal-compound additive as well as a plastic material and gypsum and/or calcium sulfite. The composite is improved in that it emits very little or substantially no toxic gas such as sulfur dioxide and hydrogen sulfide when it is burned and when the ash thereof is contacted with water.