Canon Kabushiki Kaisha

Yuichiro Shibuya

Taku Shinohara

Yasuhiro Takahashi

Jun Itoh

Masaki Kawanishi

Keishi Araki

If a sheet type has been changed without changing the charge-elimination charge adjustment value, a charge elimination control may be performed on sheets with a charge adjustment value inappropriate for the sheets, which may result in charging the sheets and lead to further sticking of the sheets. A control method for printing system, that includes a charge elimination unit that performs a charge elimination process on a sheet, includes performing a printing process, performing, in a case where a sheet type to be used for the printing process has been changed during the printing process, control to stop the printing process, and changing a setting of charge elimination that is performed by the charge elimination unit.

Printing system, printing system control method, and storage medium

An image forming apparatus is provided that includes mechanisms for registering strings, extracting text information from received job data, determining a job availability of the received job data based on a comparison of the extracted text information with the registered strings, associating a result of the determination of job availability with the received job data and storing the result of the determination of job availability and the received job data; and controlling an execution of the received job data based on the result of the determination of job availability, in response to receiving an execution instruction of the received job data.

Image forming apparatus having a security mechanism for controlling the content of a printed document and control method thereof

An object is to appropriately control a fixing process while making an attempt to increase speed by improving the PPM in an electrophotographic image forming apparatus. In the electrophotographic image forming apparatus, the control unit decompresses compressed quantized raster image data in units of pages. Then, the control unit derives an image feature quantity from decompressed raster image data in units of pages and notifies the printing unit of the derived image feature quantity. Then, the control unit transfers the decompressed raster image data to the printing unit in units of pages in response to an image transfer request from the printing unit. The printing unit sets a parameter relating to a fixing process in the printing processing based on the notified image feature quantity. Then, the printing unit performs the printing processing in accordance with the set parameter for the decompressed raster image data received from the control unit.

Image forming apparatus, control method, and storage medium for improving throughput in an electrophotographic image forming apparatus

The printing apparatus deletes a deletion target print data even if the printing apparatus is in a predetermined state in a case where the number of pieces of deletion target print data that are registered and are not deleted yet reaches a predetermined number.

Printing apparatus and storage medium

When a reading error occurs while reading out image data saved in a hard disk, input data which is saved in a RAM is read out and image data is regenerated from the read input data. This enables reprinting by an image formation apparatus alone without requiring a user to re-input image data even when the reading of data occurs due to abnormality of the hard disk.

Image formation apparatus having reading error and regenerating image data, control method of image formation apparatus, and storage medium

An image forming apparatus executes an image forming operation adequately while reducing a cumbersome work of a user of setting the sheet size. A processor of the image forming apparatus controls an image forming portion to form the image on the sheet even if the sheet size included in an image forming job is inconsistent with the sheet size stored in a storage portion. In such a mode, the processor controls a notification portion so as to give notification when a size detection portion detects one of regular sheet sizes and where the sheet size included in the image forming job is inconsistent with the detected sheet size.

Image forming apparatus

Printing apparatus for reducing the inhibition of printing when a deletion instruction has been issued

An image forming apparatus includes a processor to execute one of a plurality of modes. In a first mode the processor controls an image forming portion to form an image on the sheet only if a sheet type included in an image forming job is consistent with the sheet type stored in a storage portion, and in a second mode the processor controls image formation even if the sheet type is inconsistent with the stored sheet type. In a third mode the processor displays the type setting screen on the display at a time when the sheet is supported on the sheet support portion. In a condition in which the processor is set in the third mode, the display is controlled so as not to display the type setting screen at the time the sheet is supported on the sheet support portion in the second mode.

An image forming apparatus that, in a case where it is determined that a scaling ratio of the inputted image data does not exceed a predetermined threshold, executes processing for scaling the inputted image and then executes first detection processing that detects an amount of applied toner using image data after scaling, and in a case where it is determined that the scaling ratio of the inputted image data exceeds the predetermined threshold, executes second detection processing that detects the amount of applied toner using the inputted image data prior to scaling and then executes scaling processing after executing the second detection processing.

Image forming apparatus that obtains an amount of applied toner using image data before or after scaling, method of controlling the same, and storage medium

An image forming apparatus which is capable of efficiently executing print jobs. The image forming apparatus receives a second print job after receiving a first print job and prints a plurality of copies of print data corresponding to the first print job. Whether or not the print data is to be printed by sort printing is determined, and when the print data is to be printed by sort printing, reception of the second print job is restricted until printing of the print data is completed, and when the print data is not to be printed by sort printing, reception of the second print job is not restricted even before printing of the print data is completed.

Image forming apparatus that restricts reception of print job based on a type of a previously received print job and control method therefor

An image forming apparatus includes a measurement unit configured to measure a density of an image that an image forming unit forms, an acquisition unit configured to acquire an image processing parameter serving as a correction value used to correct the measured density of the image, a generation unit configured to generate a cleaning patch image using the acquired image processing parameter, and a cleaning patch image forming unit configured to form the cleaning patch image generated by the generation unit on an image bearing member, wherein the cleaning patch image is formed during an interval after a first image is formed by the image forming unit on the image bearing member but before a second image having a printing instruction issued subsequent to a printing instruction issued for the first image is formed by the image forming unit on the image bearing member.

Image forming apparatus, image forming method, and storage medium

An image forming apparatus includes a dot count unit configured to count a number of dots of print data, a first toner remaining amount value calculation unit configured to, in a case where received print data satisfies a printing condition, calculate a toner remaining amount value for the print data based on the number of dots obtained by the dot count unit, and a second toner remaining amount value calculation unit configured to, in a case where the received print data does not satisfy the printing condition, set a predetermined toner remaining amount value as the toner remaining amount value for the print data.

Image forming apparatus, control method, and storage medium

An image processing apparatus comprises: a division unit which divides the input image data into blocks each including a predetermined number of pixels; a determination unit which determines whether the number of colors that is the number of types of colors of the pixels included in the block is not less than a predetermined number; a pseudo halftone processing unit which performs pseudo halftone processing of image data for the block if the number of colors in the block is not less than the predetermined number; an acquisition unit which acquires a color arrangement and color information in each of the block, in which the determination unit determines that the number of colors is less than the predetermined number, and the block having undergone the pseudo halftone processing; and a storage unit which stores the color arrangement and the color information, acquired, for each block.

Image processing apparatus, image processing method, and computer-readable medium for image data compression

An image processing apparatus which applies processing to image data encoded by an encoding method that encodes image data by holding, for each block including the predetermined number of pixels, color information and color layout information included in that block, the apparatus comprises: a detection unit configured to detect a region including successive pixels having identical color information, the number of pixels of which is larger than a predetermined value, using the color information and the color layout information in the encoded image data; and a conversion unit configured to convert color information of a pixel corresponding to a predetermined position in the region, and layout information of a block including the pixel at the predetermined position, of a plurality of blocks including the region detected by the detection unit.

Image processing apparatus, control method and computer-readable medium

The present invention allows for storing new document data immediately after the details of processing associated with a box are changed. The present invention provides a workflow processing apparatus executing processing procedures in sequence for data existing in a storage location based on setting information, where the workflow processing apparatus includes a data registration unit changing the setting information, a data acquisition unit determining whether or not data exists in the first storage location when the setting information is changed, and a box operation unit that changes the original name of the first storage location to a new name and that generates the second storage location having the original name when it is determined that the data exists in the first storage location.

Workflow processing method and apparatus for determining the existence of data in the storage location and changing the setting information and name of storage location

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Abiko, Japan

Yuichiro Shibuya