Control device, image scanning apparatus, image forming apparatus, and method of controlling image scanning apparatus

摘要

A control device including an image enlarging unit that creates enlarged image data of image data by repeatedly using a line in the image data; and a control unit that reads, from a storing unit in which the image data is stored, the image data and outputs, to the image enlarging unit, the image data for each line, the output being performed at time intervals corresponding to the number of times the line is used in accordance with an enlargement ratio of the image data to the enlarged image data.

主权项

1. A control device comprising:
an image enlarging unit that creates enlarged image data of image data by repeatedly using a line in the image data; and a control unit that reads, from a storing unit in which the image data is stored, the image data and outputs, to the image enlarging unit, the image data for each line, the output being performed at time intervals corresponding to a number of times the line is used in accordance with an enlargement ratio of the image data to the enlarged image data, wherein the control unit includes a command control unit and a timing control unit, the command control unit outputs an enlargement ratio control signal to the timing control unit, the enlargement ratio control signal including information on the enlargement ratio, the timing control unit creates a control signal that controls a time interval corresponding to the number of times the line is used, based on the enlargement ratio control signal output from the command control unit, the control unit reads the image data from the storing unit in accordance with the control signal, in response to the control signal having a value of one, the timing control unit outputs a synchronization signal and the control unit outputs the image data in synchronization with the synchronization signal to the image enlarging unit, the timing control unit
compares a first signal, which is output from a first counter that controls an output cycle of the line, with a second signal, which is output from a second counter that determines the output cycle for every line, andgenerates a signal indicating an end of the line, when the first signal and the second signal have a same value, the first counter monitors the output cycle of the line using both a received third signal and a signal from a central processing unit (CPU), and the second counter generates the second signal based on a first input signal, which increments an output cycle counter of a line, and a second input signal, which resets an output cycle counter of a line.