Abstract: Since both gloss and a reflection characteristic are measured by one surface characteristic measurement device, a gloss measurement target area and a reflection characteristic measurement target area are appropriately set. A gloss measurement instrument and a color measurement instrument are integrated with a gloss colorimeter. The gloss measurement instrument illuminates an illumination target face by illumination light, receives reflected light generated by a regular reflection of the illumination light on the illumination target face, and outputs a measurement result for the reflected light. A size of the gloss measurement target area can be changed. The color measurement instrument illuminates the illumination target face by annular illumination light, receives reflected light generated by a reflection of the annular illumination light on the illumination target face, and outputs a measurement result for the reflected light. A size of the reflection characteristic measurement target area can be changed.

Abstract: A surface inspection device includes an opening defining an aperture plane, one or more optical transceivers, and a processor. Each optical transceiver includes a light emitter and a light receiver that are arranged in different directions with respect to the aperture plane when viewed from above a virtual normal line of the aperture plane. The processor acquires detection values from the optical transceivers and calculates an evaluation value of a degree of variation in the detection values.

Abstract: A surface inspection device includes an opening defining an aperture plane, one or more optical transceivers, and a processor. Each optical transceiver includes a light emitter and a light receiver that are arranged in different directions with respect to the aperture plane when viewed from above a virtual normal line of the aperture plane. The processor acquires detection values from the optical transceivers and calculates an evaluation value of a degree of variation in the detection values.

Abstract: Since both gloss and a reflection characteristic are measured by one surface characteristic measurement device, a gloss measurement target area and a reflection characteristic measurement target area are appropriately set. A gloss measurement instrument and a color measurement instrument are integrated with a gloss colorimeter. The gloss measurement instrument illuminates an illumination target face by illumination light, receives reflected light generated by a regular reflection of the illumination light on the illumination target face, and outputs a measurement result for the reflected light. A size of the gloss measurement target area can be changed. The color measurement instrument illuminates the illumination target face by annular illumination light, receives reflected light generated by a reflection of the annular illumination light on the illumination target face, and outputs a measurement result for the reflected light. A size of the reflection characteristic, measurement target area can be changed.

Abstract: The present invention provides an image reading apparatus that includes: a photoelectric sensor including plural reading pixels aligned in one direction and output an electric signal depending on the amount of light from an image on the document; a read control section that reads a document image with the photoelectric sensor in accordance with a read instruction, and obtains image data; a black correction section that performs a black correction to adjust an output under dark condition of each reading pixel to a value within a predetermined range, the output under dark condition being an electric signal output when the amount of light input is zero; and a black correction execution determining section that determines whether to perform the black correction, when the read interval between each two document sheets of the multi-page document is equal to or shorter than a predetermined period of time.

Abstract: There is provided a data processing device that includes an obtaining unit that obtains a first image data set, a second image data set generated by reading an image formed using the first image data set, and a property data set indicating the properties of a recording medium on which the image is to be reproduced. The data processing device also includes a specifying unit that determines a threshold for a density difference between the first image data set and the second image data set, wherein the threshold depends on the property data set. The specifying unit also determines an error area where the density difference between images expressed by the first and second image data sets is equal to or greater than the threshold.

Abstract: A surface profile measuring apparatus of the invention has a changing section for changing the cross section of a flux of light to be projected onto a sample by a light projecting section in measuring a surface profile of the sample. The surface profile measuring apparatus having the above arrangement enables to measure the surface profile of the sample easily and precisely, without using different kinds of measuring apparatuses.

Abstract: The present invention provides an image reading apparatus that includes: a photoelectric sensor including plural reading pixels aligned in one direction and output an electric signal depending on the amount of light from an image on the document; a read control section that reads a document image with the photoelectric sensor in accordance with a read instruction, and obtains image data; a black correction section that performs a black correction to adjust an output under dark condition of each reading pixel to a value within a predetermined range, the output under dark condition being an electric signal output when the amount of light input is zero; and a black correction execution determining section that determines whether to perform the black correction, when the read interval between each two document sheets of the multi-page document is equal to or shorter than a predetermined period of time.

Abstract: There is provided a data processing device comprising: an obtaining unit that obtains a first image data set, a second image data set, and a property data set, the second image data set being generated by reading an image which is formed on a recording medium in accordance with the first image data set by an image forming device, and the property data set indicating a property of the recording medium; and a specifying unit that determines a threshold for a density difference between the first image data set and the second image data set, depending on the property data set, and specifies, as an error area, an area where the density difference between images expressed by the first and second image data sets is equal to or greater than the threshold.

Abstract: A surface profile measuring apparatus of the invention has a changing section for changing the cross section of a flux of light to be projected onto a sample by a light projecting section in measuring a surface profile of the sample. The surface profile measuring apparatus having the above arrangement enables to measure the surface profile of the sample easily and precisely, without using different kinds of measuring apparatuses.

Abstract: An image forming apparatus, such as a copier or a printer, in which recyclable components to be discarded are recycled in newly producing an image forming apparatus. The image forming apparatus includes a first image forming section for forming an image of first type, a control board and a first drive circuit. The first drive circuit drives the first image forming section. The first drive circuit is connected to the control board. The control board has a connection section to be connected to a second board on which a second drive circuit for driving a second image forming section is mounted. The second image forming section forms an image of second type.

Abstract: An image forming apparatus, such as a copier or a printer, in which recyclable components to be discarded are recycled in newly producing an image forming apparatus. The image forming apparatus includes a first image forming section for forming an image of first type, a control board and a first drive circuit. The first drive circuit drives the first image forming section. The first drive circuit is connected to the control board. The control board has a connection section to be connected to a second board on which a second drive circuit for driving a second image forming section is mounted. The second image forming section forms an image of second type.