Patent application number | Description | Published |
20080278765 | Method for Processing Fm-Am Mixed Halftone Images on a Multi-Bit Depth Imaging Apparatus - Disclosed is a method for processing FM-AM mixed halftone images on a multi-bit depth imaging apparatus, which relates to a method for producing halftone dots in the field of image hard copying. In the prior art, since it is hard to avoid the impact of the error diffusion for the output apparatus to control the mixed dots with multi-bit imaging depth based on the error diffusion, the output of the mixed dots with multi-bit imaging depth cannot satisfy requirements of the apparatus. According to the method of the present invention, the dynamic algorithm for controlling the multi-bit mixed dots is used for screening based on the existing mixed screening process using dual-feedback error diffusion. Furthermore, multi-bit halftone images with high quality and rich gradations can be output by the multi-bit depth imaging apparatus. The method of the present invention can solve the phenomenon of sawtooth in the margins of the mixed dots output by the conventional single-bit apparatus and obtain the FM-AM mixed dots with the effect of high resolution and continuous gradations, which are output under low resolution. | 11-13-2008 |
20080285085 | Method for Controlling the Shapes of FM-AM Mixed Dots on a Multi-Bit Depth Imaging Apparatus - Disclosed is a method for controlling the shapes of FM-AM mixed halftone dots on the multi-bit depth imaging apparatus. In the prior art, since the reproduction of the shapes of the dots in various gradations is absolutely based on the theory of random error diffusion and is influenced by the dynamic controlling output mechanism for the multi-bit dots, it is hard to assure the controllability of the shapes of the dots in a certain gradation. Based on the prior art, the dynamic statistic algorithm with adjacent output gray levels is introduced to assure the controllability of the shapes of the dots and solve the problem of random change of the shapes of the dots due to the randomicity of the error diffusion. According to the disclosed method, the features of the multi-bit imaging apparatus can be achieved fully in light of the requirements of the dots on the basis of the original method for multi-bit FM-AM mixed screening using error diffusion based on dual-feedback. The effect of FM-AM mixed halftone screening can be achieved under low resolution with controllable shapes of the dots, The problem of granular sensation can be solved during the practical output of the mixed halftone dots so as to assure the smooth effect of the gradations. | 11-20-2008 |
20080297853 | Methods and Apparatus for Embedding and Detecting Digital Watermarks in a Text Document - Disclosed are a method and apparatus for embedding or detecting watermarks in a text, which belong to the field of document protection. The method and apparatus overlay an additional layer of shade in a document for recording a large amount of information from watermarks. The shade comprises the dots arranged under certain rules. Shifts of the dots record each bit string within the watermark. According to the method and apparatus, a large amount of information can be embedded and the watermarks embedded in the shade are dispersed together with the document which can be digitized by a scanner for being detected. | 12-04-2008 |
20090051972 | Method and Apparatus Capable of Producing FM Halftone Dots in High Speed - The present invention relates to a method and apparatus capable of generating frequency-modulation halftone dots in high speed and belongs to the field of the digital image halftone. In the prior art, read-write operation is usually carried out many times in error rows during processing each pixel so that halftone dots are generated in low speed. In the method according to the present invention, the error generated by the current pixel is buffered in a register file and the final accumulated error values are written in the error rows only after all of the relative pixels are processed. Thus, read-write operation is carried out only once in the error rows for processing each pixel. The present invention also provides an apparatus to implement the method. The apparatus comprises an error row memory, an error buffer register file, a gray generation circuit, a threshold comparison circuit, an error generation circuit, an error buffer register file control circuit, and an error row control circuit. The method and apparatus according to the present invention decrease the steps in operation and improve the speed for generating the frequency-modulation halftone dots. | 02-26-2009 |
20090231997 | METHOD FOR DISPLAYING A PACKET SWITCHED CONGESTION STATUS OF A WIRELESS COMMUNICATION NETWORK - A method and mobile electronic device are provided that display, for a user, a packet switched congestion status of a wireless communication network that is useful for estimating a network quality of service. The method includes transmitting a packet switched congestion status inquiry message from the mobile electronic device to a first network element in the wireless communication network. A reply message received from the first network element in response to the packet switched congestion status inquiry message is then processed. The reply message includes transmission delay information obtained from a device transmission delay between the first network element and the mobile electronic device and a network transmission delay between the first network element and at least one packet switched support node. The packet switched congestion status is then determined based on the transmission delay information. Finally, the packet switched congestion status is displayed on the mobile electronic device. | 09-17-2009 |
20090257076 | Method of document protection - This invention relates to a method for preventing a copy of document, belonging to a technical field of entire copy protection of document. In the prior art, for some important documents, specially the secret ones, the reproduction of this kind of document is usually prohibited by its owner because of the security. But the technique in the prior art can not solve the problem of preventing unauthorized reproduction. The method of the present invention is intended to embed a shading pattern under the original image of anti-copy document by an application program installed in the copy device, and decide whether the document can be copied legally or not. By the method of present invention, it is possible to detect the watermark information of the anti-copy document accurately and quickly, and prevent the reproduction of the anti-copy document thoroughly. Moreover, an additional memory space is no need. | 10-15-2009 |
20090296165 | Methods and Systems for Scanning and Processing an Image Using the Error Diffusion Screening Technology - Disclosed is a method for scanning and processing an image using the error diffusion screening technology, comprising: (1) scanning each pixel M | 12-03-2009 |
20110085002 | METHOD AND DEVICE FOR PRINTING IMAGE - Disclosed is a method for printing an image, comprising a step of rasterizing an image to be printed in view of a first resolution to generate a first data bitmap; a step of splitting the first data bitmap according to a ratio of the first resolution to a second resolution to generate second data bitmaps; and a step of outputting the second data bitmaps to a printer with the second resolution for printing. Disclosed is also a device for printing images. The method and device for printing an image may solve the problem in the prior art that the definition of an image printed from a printer is too low and improve the definition of an image printed from a printer. | 04-14-2011 |
20110279872 | Image Processing Method and Apparatus - An image processing method includes: generating a stochastic screening dither matrix (S | 11-17-2011 |
20130335785 | METHOD AND SYSTEM FOR DOCUMENT PRINTING MANAGEMENT AND CONTROL, AND DOCUMENT SOURCE TRACKING - Disclosed is a method and system for document printing management and control and source tracking. A printing management service program runs at a server end. A printing monitoring service program runs at a client end. The printing management service program saves client end information, monitors and manages a client end computer, sets a printing management policy, and delivers operation instructions to the client end. The printing monitoring service program collects the client end information, sends the client end information to the server end, and executes the operation instruction. | 12-19-2013 |
20140002864 | Amplification Modulation Screening Method And Apparatus | 01-02-2014 |
20140003649 | WATERMARKING IMAGE BLOCK DIVISION METHOD AND DEVICE FOR WESTERN LANGUAGE WATERMARKING PROCESSING | 01-02-2014 |
20140033937 | Screening Method And Apparatus For Use In Intaglio Printing - The present application provides a screen method for intaglio printing, comprising: dividing multiple classes of regions according to a brightness range; and generating screen dots with various screen patterns for the grouped classes of regions. The present application also provides a screen device for intaglio printing, comprising: a dividing module configured to group multiple classes of regions according to the brightness range; and a generating module configured to generate screen dots with various screen patterns for the grouped classes of regions. Since multiple kinds of screen patterns are applied in the technical solutions in present application, the problem, i.e., water ripple will occur in the prior art, may be addressed, so as to improve the quality of printing. | 02-06-2014 |
20140132992 | METHOD AND APPARATUS FOR GENERATING MULTI-BIT DEPTH HALFTONE AMPLITUDE-MODULATION DOTS - The present application discloses a method and an apparatus for generating multi-bit depth halftone amplitude-modulation dots. The method may comprise: scanning an input image to obtain a value of a current pixel P | 05-15-2014 |