Image forming apparatus which monitors hardware errors of a controller of a copying-inhibited function
First Claim
1. An image forming apparatus comprising:
- a copying-inhibited pattern detector for detecting for each pixel data constituting image data whether said pixel data is a portion of a predetermined copying-inhibited pattern;
a copying-inhibited document discriminator for discriminating whether said image data is a copying-inhibited one according to a number of pixel data recognized as a portion of a copying-inhibited pattern by said copying-inhibited pattern detector, and outputting either a copying-inhibited document detected signal or a copying-inhibited document not-detected signal;
a copying inhibition discriminating board in which said copying-inhibited pattern detector and said copying-inhibited document discriminator are incorporated;
an operation displaying unit for various types of key entry as well as for various types of displays; and
a controller for recognizing, when a copying-inhibited document detected signal is inputted from said copying-inhibited document discriminator during reading of a copied document, said copied document as a copying-inhibited document and executing copying inhibition control, and also for judging, when a copying-inhibited document detected signal or a copying-inhibited document not-detected signal is inputted at a timing other than that during document read, that a hardware error has occurred in said copying inhibition discriminating board, issuing a warning through said operation displaying unit and executing said copying inhibition control.
1 Assignment
0 Petitions
Accused Products
Abstract
A controller accurately discriminates a copying-inhibited document prepared by using paper on which a copying-inhibited pattern is printed or copied on the entire surface, executes the copying inhibition control, detects a hardware error, and executes the copying inhibition control upon detection of the hardware error by recognizing a copied document as a copying-inhibited document and executing copying inhibition control when a copying-inhibited document detected signal is inputted during an operation for reading a copied document from the copying-inhibited document discriminator, and also by determining that a hard error has occurred in the copying inhibition discriminating board, giving a warning through an operation displaying unit, and executing a copying inhibition control when a copying-inhibited document signal or a copying-inhibited document not-detected signal is inputted during a period other than that for reading a copied document.
70 Citations
11 Claims
-
1. An image forming apparatus comprising:
-
a copying-inhibited pattern detector for detecting for each pixel data constituting image data whether said pixel data is a portion of a predetermined copying-inhibited pattern; a copying-inhibited document discriminator for discriminating whether said image data is a copying-inhibited one according to a number of pixel data recognized as a portion of a copying-inhibited pattern by said copying-inhibited pattern detector, and outputting either a copying-inhibited document detected signal or a copying-inhibited document not-detected signal; a copying inhibition discriminating board in which said copying-inhibited pattern detector and said copying-inhibited document discriminator are incorporated; an operation displaying unit for various types of key entry as well as for various types of displays; and a controller for recognizing, when a copying-inhibited document detected signal is inputted from said copying-inhibited document discriminator during reading of a copied document, said copied document as a copying-inhibited document and executing copying inhibition control, and also for judging, when a copying-inhibited document detected signal or a copying-inhibited document not-detected signal is inputted at a timing other than that during document read, that a hardware error has occurred in said copying inhibition discriminating board, issuing a warning through said operation displaying unit and executing said copying inhibition control. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
Specification