| PEKING UNIVERSITY FOUNDER GROUP CO., LTD. Patent applications |
| Patent application number | Title | Published |
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| 20120099789 | Method and Device for Color Correction - The present invention discloses a method and a device for color correction for solving a problem of low color correction processing speed for images input into a computer in the prior art. A main technical solution includes: an input image is divided into no less than one image blocks; various color component values of all pixels in each image block are compared with each other, an image block with the same color component values of all pixels being regarded as a simple block, and an image block with different color component values being regarded as a complex block; and a process of color correction is performed on one pixel of the simple block, then the color correction processing result is copied to other pixels of the simple block. With the technical solution, an object of increasing processing speed can be achieved by performing simplified processing directly toward certain image parts with special features, and the color correction processing speed can be increased without general influence on the present color correction effect. | 04-26-2012 |
| 20120013626 | Method and System for Automatically Testing a Raster Image Processor - Disclosed is a method and system for automatically testing a raster image processor. The method may identify the correctness of the bitmap output by the raster image processor to be tested by comparing an abstract code of a bitmap generated by the RIP to be tested with that generated by a reference RIP to determine whether they are consistent with each other, so as to identify the correctness and stability of the RIP to be tested. Furthermore, the test samples can be submitted automatically. Thus, the convenience and efficiency are improved with respect to the manual submitting. | 01-19-2012 |
| 20110279872 | Image Processing Method and Apparatus - An image processing method includes: generating a stochastic screening dither matrix (S | 11-17-2011 |
| 20110242109 | METHOD AND DEVICE FOR SIMPLIFYING A COMPLEX PATH - The invention relates to a technical field of graphic image processing, especially to a technology for simplifying a complex path. The invention provides a method and a device for simplifying a complex path, to accomplish simplification of any complex path into a simple path of a region described by the complex path. The method for simplifying a complex path comprises: parsing the complex path into a vector linked-list consisted of linked monotonic vectors; dividing each vector in the vector linked-list into vector segments according to intersection points of the vector with other vectors in the vector linked-list; and extracting from all vector segments the vector segments located on a boundary of a region defined by the complex path, and connecting the extracted vector segments according to their location to obtain a simple path. According the method of the present application, a complex path can be simplified to a simplest path defining a region by utilizing node scanning process, such that operations on a vector level for a complex path can be realized. | 10-06-2011 |
| 20110164082 | Pulse Width Control Device and Method, Inkjet Printing Device Using the Device - Disclosed is a pulse width control device, including: a first monostable multivibrator, for receiving a synchronization pulse, and generating a negative pulse whose width is a first preset threshold; a second monostable multivibrator, for receiving the synchronization pulse, and generating a positive pulse whose width is a second preset threshold; an inverter, for receiving the synchronization pulse, and inverting the synchronization pulse, and outputting an inverted synchronization pulse; and a flip-flop, for receiving the negative pulse, the positive pulse and the inverted synchronization pulse, and generating a synchronization pulse with a width between the first threshold and the second threshold. | 07-07-2011 |
| 20110087959 | METHOD AND DEVICE FOR PROCESSING THE STRUCTURE OF A LAYOUT FILE - Disclosed are a method and a device for processing the structure of a layout file, comprising: obtaining document content structure information and/or document layout exhibition information of the layout file; dividing document contents of the layout file into content blocks according to the document content structure information and/or the document layout exhibition information; and creating document flow information of the layout file according to the divided content blocks. | 04-14-2011 |
| 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 |
| 20110084739 | Methods and Devices for Generating Trapezoidal Fire Pulses - The present application discloses trapezoidal fire pulse generating methods and devices. According to the devices and methods of the present application, the voltage value of the positive DC control voltage signal, the voltage value of the negative DC control voltage signal, the voltage value of the rise-time DC control voltage signal and a fall-time DC control voltage signal can be determined according to the parameter values of a trapezoidal fire pulse required to be output. Thus, corresponding DC control voltage signals can be generated. Further, the positive DC control voltage signal and the negative DC control voltage signal can be modulated to a square-wave pulse. Then, the rise-time DC control voltage signal, the fall-time DC control voltage signal and the square-wave pulse can be input to a inverse integrator so as to generate a trapezoidal fire pulse. Since there are specific quantitative relations between the rise time and fall time of the trapezoidal fire pulse and the voltage values of the rise-time and fall-time DC control voltage signals, the corresponding rise time and fall time of the trapezoidal fire pulses can be accurately controlled and adjusted so that the output trapezoidal fire pulses can be more stable and accurate. | 04-14-2011 |
| 20110013221 | Methods and Systems for Processing Print Jobs - Disclosed is a method for processing print jobs, comprising: determining whether a second print job being processed by an RIP is needed to pause and whether a third print job being processed by a print device is needed to pause according to a priority of a first print job requesting to be printed; storing, where the second print job is needed to pause, a processing state of the second print job and processing the first print job by the RIP; storing, where the third print job is needed to pause, a processing state of the third print job, and printing the first print job by the print device; resuming the processing for the second print job according to the stored processing state of the second print job after the first print job is processed by the RIP; and resuming the processing for the third print job according to the stored processing state of the third print job after the first print job is printed by the print device. According to the present invention, it is possible to proceed with pauses continuously, save costs and simplify manual operations. | 01-20-2011 |
| 20100299375 | Methods and Devices for Incorporating PDF Files - A method in the field of printing for merging Portable Document Format documents which increases the merging efficiency of said documents. The method comprises: performing upon all priorities, according to a high-to-low priority sequence based on pre-determined priorities for key word type combination, the following processes until all merging pages and merged pages of the documents to be merged are completely determined: acquiring the key word combination corresponding to the key word type combination in the current priority; executing the following process according to each key word combination that is acquired, until all merging pages and merged pages of the documents to be merged are determined, or until processing of all acquired key word combinations is complete. In the remaining documents to file names include documents to be merged under the current key word combination. When it is judged that the selected documents include merging documents and merged documents, merging pages and merged pages are determined; and said merging and merged pages are then merged. | 11-25-2010 |
| 20100290521 | Method and Device For Selecting Best Mode Of Intra Predictive Coding For Video Coding - A method for selecting the best mode of intra prediction coding for video coding applied in video coding and decoding field is provided. The method includes: constructing a rate distortion cost function based on an estimated rate to be encoded; computing the rate distortion costs for all predictive modes by using the constructed function, and selecting the predictive mode with the minimum rate distortion cost as the best mode of intra prediction coding according to the computing result. Accordingly, a device for selecting the best mode of intra prediction coding for video coding is provided. By the method, the selected mode is closer to the best mode selected by original rate distortion optimization model, thereby the need to code every block actually in the process of rate distortion optimization is effectively avoided. | 11-18-2010 |
| 20100218239 | Digital Content Counting System and Method - A digital content counting system and a method thereof are provided for achieving the credible transaction counting mechanism established between the owner of copyrights and the seller, to make the owner of copyrights and the seller collectively confirm the transaction information of the digital contents. The system comprises a sale subsystem, an authorization service subsystem and a transaction clearing subsystem; the sale subsystem and the authorization service subsystem authenticate each other; the transaction clearing subsystem and the authorization service subsystem authenticate each other; the transaction clearing subsystem authenticates the sale subsystem; the sale subsystem generates transaction request information according to a purchase list, sends the transaction request information to the authenticated authorization service subsystem, and records transaction success information; after receiving and confirming the transaction request information, the authorization service subsystem sends transaction success information to a client device, the sale subsystem and authenticated transaction clearing subsystem, sends an approach for obtaining an authorization file to the client device, records the transaction request information, and issues the authorization file; the transaction clearing subsystem records the transaction success information. | 08-26-2010 |
| 20100115356 | METHODS AND DEVICES FOR GENERATING DOTS OF AN IMAGE BY USING TWO ERROR ROW MEMORIES - Disclosed are devices and methods for generating dots of an image by using two error row memories, which are capable of reading and writing data synchronously. A device disclosed comprises: a buffer memory A; a buffer memory B; and a memory controller. The memory controller may comprise a read-write control circuit for the buffer memory A, a read-write control circuit for the buffer memory B, and a buffer memory selection circuit. The buffer memory selection circuit is used to generate a read-write selection signal for the buffer memory A and the buffer memory B. The read-write control circuit for the buffer memory A is connected to the buffer memory A and used to implement a read operation or a write operation on the buffer memory A according to the read-write selection signal. The read-write control circuit for the buffer memory B is connected to the buffer memory B and used to implement a read operation or a write operation on the buffer memory B according to the read-write selection signal. The devices and methods are capable of implementing read and write operations on memories synchronously, which can improve the speed of error diffusion during use. | 05-06-2010 |
| 20100097390 | Methods And Devices For Processing A Raster Image - A raster image process method and device, for solving an issue existed in the current technique that it is unable to distinguish between the white color filled in a raster image when constructing the raster image and the white color in an image object of a page description filled in the raster image afterwards. The method includes: the raster image is constructed and the white color is filled in the raster image; a process of changing a color for the white color in an image object described in a page is carried out, and the image object is filled into the raster image. Thereby the white color filled in the raster image when constructing the raster image and the white color in an image object of a page description filled in the raster image afterwards can be distinguished. | 04-22-2010 |
| 20100086130 | Digital Content Rights Management Method and System - A digital content rights management method and system belongs to the digital content rights management technique field. The method of the invention includes the steps: registering the system, generating the time stamp, verifying the time stamp when the system starts up, acquiring the certificate, verifying the time before accessing the digital content. The system of the invention comprises a device for accessing the digital content and a server, wherein the device for accessing the digital content comprises: a registering module, a time stamp generating module, a time stamp verification module, a certificate of authorization acquiring module, and a time verification module. The method and system have solved the problem that the digital content can still be used beyond the time limit. | 04-08-2010 |
| 20100053705 | Methods And Devices For Rasterizing Transparent Pages - A grating-type processing method for a transparent page comprises: scanning the transparent page twice, in the first scanning, taking grammatical interpretation to the page description file of the transparent page, dividing the page into areas, and writing primitive object information and transparent parameters generated into the intermediate file; in the second scanning, reading the primitive objects and the transparent parameters in turns from the intermediate file, and assembling the page dot matrix in each area. A grating-type processing device is also disclosed, which includes a grammatical interpretation unit, a dividing unit, a file memory unit and an assembly unit that processing grammatical interpretation, dividing the page into areas, partitioning the transparent page area and non-transparent page area, and grating-type processing according to the type of page area of the transparent page and the non-transparent page and the primitive object information and the transparent parameters, and assembling the page dot matrix in each area | 03-04-2010 |
| 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 |
| 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 |
| 20090080024 | Printing Control Method Capable of Reducing Printing Memory Requirement - The present invention belongs to the field of printing control technology, and is especially one kind of printing control method with reducing printing memory requirement. The available printing technology always needs complicated segment forming gratings in advance and occupying great amount of memory. The printing control method of the present invention includes interpreting the page data as banded intermediate format data, calculating the time for forming grating of each band of the intermediate format data, pre-analyzing the bands with time for forming grating greater than the printing time, and arranging the job of forming grating of the complicated bands in the idle print time as far as possible. The said method can reduce the band number of forming gratings in advance and reduce the printing memory requirement. | 03-26-2009 |
| 20090016629 | Method of Performing Fast Compression and Decompression for Image - The present invention relates to an image compression and decompression method, in particular in the areas of computer image processing and data compression. The currently, the process speed for which JPEG (Joint Photographic Experts Group, a compression standard) is applied, it's not all too satisfactory. One aspect of the present invention is simplify compression process based on particular features of an image, thus achieve the aim of accelerate the processing speed. Apply the process described in the present invention, the processing speed for JPEG compression/decompression would rise, without suffers quality reduction compare to current JPEG compression/decompression method. | 01-15-2009 |
| 20090006838 | Methods for Downloading a Digital Work Automatically Bound with Characteristics of a Portable Device - Disclosed is a method for downloading a digital work automatically bound with characteristics of a portable device, which refers to a technology of digital rights protection using an embodied system. The method achieves convenient and safe binding of digital works for a portable device. A storage space of the portable device stores digital contents and an executable program which is executed automatically after the portable device is connected to a network terminal. By this method, copyright-protected digital contents can be purchased or borrowed, and downloaded to the portable device. | 01-01-2009 |
| 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 |
| 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 |
| 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 |
