Abstract: A document handler, such as used in a digital copier, includes an input tray and an output tray, connected by a paper path. Along the paper path are disposed two scan heads, one to record image data from each side of the sheet. The two scan heads are separated from each other along the paper path by a pitch length longer than a sheet to be scanned. The arrangement allows an image on each side of the sheet to be scanned at an exclusive time. For long sheets, a recirculation path, associated with the paper path, is used to allow the sheet to re-enter the paper path: in this way, one side of the sheet is scanned with one scan head, and then the other side is scanned with the other scan head.

Abstract: A pseudo-random number generator comprises a controller, a plurality of LFSRs, a FIR filter and a normalizer. The pseudo-random number generator initializes the LFSRs in such a manner that each LFSR has a predetermined phase difference with the other LFSRs, sets the coefficient of the FIR filter in accordance with the desired frequency characteristic of a noise signal, and sets a parameter in the normalizer. The operation of the LFSRs is started, thereby acquiring a noise signal having the desired frequency characteristic.

Abstract: A facsimile apparatus is disclosed that performs accurate and efficient facsimile transmission while obtaining accurate reception capacity information of each transmission destination. The reception capacity of each transmission destination is stored, together with the mail address, in a memory unit of the apparatus. When facsimile transmission accompanied by a delivery confirmation request is carried out, a main controlling unit causes the memory unit to store the transmission mode. If delivery confirmation mail from the transmission destination contains reception capacity information, the main controlling unit causes the memory unit to store it as the reception capacity information of the transmission destination. If the delivery confirmation mail does not contain reception capacity information but confirms that the communication has been properly completed, the transmission mode already stored in the memory unit is stored as a transmission enabling mode of the transmission destination in the memory unit.

Abstract: Color is represented using digital values B (brightness), e and f such that B=?{square root over (D2+E2+F2)}, e=E/B, f=F/B, where DEF is a linear color coordinate system. Alternatively, color is represented using digital values B, C (chroma) and H (hue), where cos C=D/B and tan H=E/F. Brightness can be changed without a color shift by changing the B coordinate and leaving unchanged the other coordinates e and f or C and H. Other features are also provided.

Abstract: Color is edited using a color representation including digital values B (brightness), C (chroma) and H (hue) such that B=?{square root over (D2+E2+F2)}, cos C=D/B and tan H=E/F, where DEF is a linear color coordinate system. The hue can be changed without changing the brightness and without changing the saturation if the H coordinate is changed without changing B and C. Also, the brightness can be changed without a color shift by changing the B coordinate and leaving unchanged the C and H coordinates. Other features are also provided.

Abstract: Color is edited using a color representation including digital values B (brightness), e and f such that B=?{square root over (D2+E2+F2)}, e=E/B, f=F/B, where DEF is a linear color coordinate system. Alternatively, color is represented using digital values B, C (chroma) and H (hue), where cos C=D/B and tan H=E/F. Brightness can be changed without a color shift by changing the B coordinate and leaving unchanged the other coordinates e and f or C and H. Other features are also provided.

Abstract: In a digital image having pixels pi (i=1,2, . . . ) and a brightness B(pi) at each pixel pi, the contrast editing is performed by replacing the brightness B(pi) with B*(pi)=Bavg1??(pi)×Bo?(pi), where ? is a positive constant other than 1, and Bavg is a weighted average of the B values in an image region R(pi) containing the pixel pi. The image can be a color image, with color represented using digital values B (brightness), e and f such that B=?{square root over (D2+E2+F2)}, e=E/B, f=F/B, where DEF is a linear color coordinate system. Alternatively, color can be represented using digital values B, C (chroma) and H (hue), where cos C=D/B and tan H=E/F. The contrast can be edited without a color shift (i.e. without changing the chromaticity coordinates) by changing the B coordinate and leaving unchanged the other coordinates e and f or C and H. Sharpness can be edited using the same techniques with a small region R(pi).

Abstract: Color is edited using a color representation including digital values B (brightness), C (chroma) and H (hue) such that B=?{square root over (D2+E2+F2)}, cos C=D/B and tan H=E/F, where DEF is a linear color coordinate system. The saturation can be changed without changing the brightness and without changing the hue if the C coordinate is changed without changing B and H. Also, the brightness can be changed without a color shift by changing the B coordinate and leaving unchanged the C and H coordinates. Other features are also provided.

Abstract: A system and processes for the accurate measurement and control of image color values on a printing press with or without the presence of a color bar. More particularly, a barless color control system and processes for controlling the color quality of color images printed on a substrate online or offline, with or without a color bar printed on the substrate. The system provides an efficient and inexpensive method for barless closed loop color control and the processes are conducted without pixel-by-pixel comparisons.

Abstract: A printer module for a compact printer system has an elongate body having a longitudinal axis and a stationary printhead housed within the body. Two opposing slots are interconnected by a paper path which passes through the body. An ink reservoir within the body provides ink to the printhead. Images to be printed are transferred to the printhead from a storage device.

Abstract: The Management of color presented at end point devices such as a display or printer is based on the implementation of a Color Management Resource (CR). A CMR is an architected resource stored accessibly to a print server or other processor that is used to carry all of the color management information required to render a print file, document, page, or data object.

Abstract: The management of color presented at end point devices such as a display or printer is based on the implementation of a Color Management Resource (CMR). A CMR is an architected resource stored accessibly to a print server or other processor that is used to carry all of the color management information required to render a print file, document, page, or data object.

Abstract: The management of color presented at end point devices such as a display or printer is based on the implementation of a Color Management Resource (CMR). A CMR is an architected resource stored accessibly to a print server or other processor that is used to carry all of the color management information required to render a print file, document, page, or data object.