Sharp Kabushiki Kaisha Corporation

Takeshi Mutoh

Shohichi Fukutome

Mitsuharu Yoshimoto

Norio Tomita

Kazuma Ogawa

Kenji Itoh

Seiji Kohashikawa

Setsuya Kobayashi

Takayuki Amagai

Takahiro Daido

Masao Murakami

In one embodiment, image reading apparatusesandstart reading an original image after a reading start time Ta has elapsed since detecting the transport timing of an original G on the upstream side in a transport direction Yrelative to an original reading position R, adjust the reading start time Ta based on a reading timing adjustment time Tfrom when the transport timing of an adjustment sheet P is detected until when original reading portionsandread a position considered to be a leading edge P' in a first mark Qon the adjustment sheet P, and correct the reading start timing of the original G based on a leading edge reading error correction time Tstored in advance.

Image reading apparatus, image forming apparatus, and image processing apparatus

An image-processing apparatus, as well as an image-processing method, is provided with a first inspection circuit which, with respect to density values of pixels within a specific area consisting of a target pixel and pixels in a vicinity thereof in image data for each color component, calculates an average density value, the sum of density differences, that is, the sum of absolute values of differences between the target pixel and the peripheral pixels, and the number the peripheral pixels having the same density value as the target pixel, so that a judgement is made as to whether the target pixel is a maximum value or a minimum value, and also calculates a run-length and the degree of busy from the pixel forming the maximum value or the minimum value. Moreover, based on the run-length and the degree of busy, the second inspection circuit extracts a pixel weight switching signal for each of the color components, and detects the periodicity of meshes of image data by counting pixels not less than the standard value or not more than the standard value based on the pixel weight switching signal within a predetermined counting area. With this arrangement, it becomes possible to carry out the discrimination between character areas and mesh areas as well as the discrimination between black character areas and white character ares with high precision.

Image-processing apparatus and image-processing method

When any of the functions: copier function, printer function and facsimile function, are not being performed, the function information display portion provides display messages 'Copier available', 'Printer available' and Fax available&rsquo;, using the display areas equal in size, arranged in the vertical direction. When a print request is given from an external apparatus, the function information display portion provides a display message &lsquo;Printer function engaged&rsquo; along with the image processing operating conditions and provides display messages &lsquo;Copier function partly available&rsquo; and &lsquo;Facsimile function partly available&rsquo; in the left and right halves of the display section. While the printer function is in progress, the information relating to the printer function is displayed in the display area four times as large as that for the copier function and that for the facsimile function.

Function display method and multi-functional apparatus having display embodying such method

Growing community of inventors

Nara, Japan

Takeshi Mutoh