Image processing apparatus, system, and method with adaptive transfer
AssigneeCanon Kabushika Kaisha
InventorTakuya Tsujimoto
Life of this patent
Estimating the term…
Abstract
This invention is to transmit read image data to a host device using a transfer mode which guarantees a predetermined band and does not perform error check or retransmission time suitable for the original purpose of prescanning. When a prescanning instruction is received from a host computer (112), a scanner (115) is driven to read an original image, and thinning/interpolation and compression are performed. In addition, transfer through a communication interface USB to the host computer (112) is performed in the isochronous transfer mode which guarantees a predetermined band within a periodically continuous time and does not perform retransmission in response to error occurrence, thereby realizing high-speed transfer.
Claims46
An image processing system comprising:
- an image processing apparatus having read means for scanning an original and converting the original into image data, said image processing apparatus performing serial communication with another apparatus through a predetermined network or a communication interface;
- communication means, having a first transfer mode which does not correct a communication error and a second transfer mode which corrects a communication error, for transferring the image data read by said read means in one of the modes;
- and
- control means for controlling said communication means to transfer prescanned image data from said read means in the first transfer mode and transfer main scanned image data in the second transfer mode.
An image processing method of performing serial communication with another apparatus through a predetermined network network or a communication interface, comprising:
- the read step of scanning an original by predetermined read means and converting the original into image data;
- the communication step of transferring the image data read by said read means in one of a first transfer mode which does not correct a communication error and a second transfer mode which corrects a communication error;
- and;
- the control step of controlling the communication step to transfer prescanned data in the read step in the first transfer mode and transfer main scanned data in the second transfer mode.
Dependencies are inferred from the claim text.