60results about How to "No loss of image quality" patented technology

The invention relates to a self-adapting down-sampling stereo video compressed coding method based on a residual error macro block, adopting a stereo video coding scheme based on united compensated prediction by time and spatial correlation analysis of the video information of the left viewpoint and the right viewpoint of a stereo video and correlation analysis between the left viewpoint and the right viewpoint, wherein two images of stereo video of a stereo video image pair are formed according to the human eye vision inhibition theory; a high-resolution image can inhibit fuzzy parts in a low-resolution image, and the finally obtained stereo perception mainly depends on the high-resolution image. Based on the theory, the invention provides a down-sampling method based on a residual errormacro block, comprising the following steps: respectively adopting three down-sampling modes according to movement conditions of the image in different directions to reduce the sampling distortion factor; then according to a motion compensated prediction mode, a parallax compensated prediction mode and a united compensated prediction mode in stereo video coding, judging the severity rate of the movement of the current coding block, thereby realizing the self-adapting down-sampling method based on the residual error macro block and improving the coding efficiency.

An RF coil system for a magnetic resonance imaging apparatus whereby a substantially computer-aided and hence automatically optimized image quality in respect of signal-to-noise ratio and resolution can be achieved in dependence on the type and size of the object to be imaged, without time-consuming replacement or manual positioning of the RF coil system being necessary. To this end, the coil system (A) includes a plurality of single RF coils (Sx) which are essentially decoupled from one another and have a different size and / or different position, as well as a control device with a plurality of transmission units which are associated with a respective RF coil and whereby one or more RF coils can be selected and supplied with an RF pulse having an independently adjustable amplitude and / or phase and / or pulse shape. The invention also relates to a magnetic resonance imaging apparatus provided with such an RF coil system.

The invention relates to a method for processing a digitalized paper card in the field of information processing, which comprises a paper card production stage and a paper card information reading stage, wherein the paper card production stage specifically comprises the following steps: reading a printed image of a produced paper card, such as a bus ticket, a ship ticket, an admission ticket of a public place and securities, and the additional information reflecting the purposes of the paper card; converting the additional information with a macro code or a micro code; and embedding the additional information in the printed image on the paper card to be printed and printing the paper card to obtain the digitalized paper card. The digitalized paper card information reading stage specifically comprises the following steps: reading the printed image of the digitalized paper card with a CCD, CMOD image sensor or a scanner; identifying the code value information of the macro code or the micro code; and controlling the opening or closing of a gate of an automatic ticket examiner according to a code value. Compared with a conventional magnetic card and an RFID card, the method has the characteristics of low system importing cost and easy popularization.

The invention provides an electronic endoscope image enhancement method and device. According to the method, by changing the light source output illumination brightness when adjacent two frame images of a camera are imaging, and then, synthesizing the two frame images, endoscope high-dynamic-range image enhancement is realized, and moving object fuzzy imaging due to increase of exposure time is avoided. According to the method, the electronic endoscope device for dynamic-range image enhancement is provided.

Methods and systems for utilizing conjugate cluster halftone screens to embed patterns or images as invisible watermarks into both digital halftone image files and corresponding printed documents are disclosed. In general, two or more two-conjugate halftone screens can be configured to provide a basic information carrier for embedding a digital watermark into a document. Thereafter, one or more clusters can be created from the two-conjugate halftone screens, wherein such clusters include the same centroid position relative to a grid defined by fundamental halftone frequencies. Two halftone patterns can then be blended from the two-conjugate halftone screens in a cluster-to-cluster basis so that virtually no loss of image quality occurs in comparison with an output of either the two-conjugate halftone screens, thereby permitting the digital watermark to be embedded into the document utilizing the two-conjugate halftone screens.

The invention discloses a processing method of a code stream of a stereo video and an apparatus thereof. According to the processing method of a code stream of a stereo video, specific predetermination structure coding is employed to form an MVC code stream; a basic view sub-code stream and an expanded view sub-code stream only referring to the basic view in the MVC code stream are extracted; andafter conversion of the MVC code stream containing the two view sub-code streams, frame-to-frame processing is carried out on data of all frames in a VCL data flow of the converted MVC, so that it can be ensured that a video frame arrangement sequence of a packaged AVC code stream is identical with a corresponded frame arrangement sequence in the received MVC code stream. A video frame in the AVCcode stream and a corresponded video frame in the MVC code stream have a same reference frame list. Meanwhile, according to motion information of the MVC code stream, a field value of a field in slice header information is changed so as to realize lossless conversion from the MVC code stream to the AVC code stream; therefore, it can be ensured that an image output by an AVC decoder is identical with a corresponded image output by an MVC decoder and there is no image quality loss.

The embodiment of the invention provides a focusing method and a mobile terminal. The method is applied to the mobile terminal having a first camera and a second camera. The method comprises the steps of acquiring first focusing data of the first camera during a preview image collection process of the second camera; and converting the first focusing data into the second focusing data, and arranging the data into the second camera, wherein the number of pixel points used for focusing in the first camera is more than that of the pixel points used for focusing in the second camera. According to the method and the mobile terminal provided by the embodiment of the invention, the problem that a part of area cannot support phase focusing as the part of area lacks of the focusing pixel points is solved while imaging quality is not reduced, and accuracy of phase focusing is improved; when no-delay photographing or picture recording is performed, no-delay photographing speed and focusing speed in picture recording when a focus changes are improved, and thus the picture recording effect when the focus changes becomes better.

The invention relates to a method for processing structured description of video image data and capable of implementing a function of multi-target tracking in a computer system, belonging to the technical field of video treatment. According to the method, a target detecting module is used for detecting and matching a dynamic target of video image data, and updating the target status according to a situation whether the dynamic target is shaded, and then updating the target and a track; and describing information by an information describing module, to generate structured description information which is understandable to both a computer and a human body. According to the method for processing structured description of video image data and capable of implementing the multi-target tracking, the video search speed is effectively increased to adapt to application of the video image in the network transmission on the basis of not reducing the image quality and not increasing the code rate; besides, the method for processing structured description of video image data and capable of implementing the function of multi-target tracking in the computer system is simple to implement, low in application cost and wider in application range.

The invention discloses an underwater image splicing method based on multi-scale image fusion and SIFT features. The method comprises the following steps: 1) performing image enhancement on an underwater image by adopting an improved white balance algorithm and a linear interpolation-based CLAHE algorithm; 2) fusing an image after image enhancement by adopting a double pyramid image fusion methodto obtain an underwater preprocessed image; 3) performing underwater image registration on the underwater preprocessed image through an improved SIFT algorithm; and 4) calculating to obtain an image affine transformation matrix, and completing final underwater image splicing by adopting a linear gradual change synthesis algorithm. Experiments prove that the method fully considers the underwater environment and underwater imaging characteristics, and can obviously improve the effects and accuracy of underwater image enhancement, registration and splicing.

The invention discloses a full-range imaging method and system based on mobile optical grating spatial carrier frequency spectral domain OCT (optical coherence tomography). According to the method and the system, a mobile optical grating replaces a reference mirror in the conventional spectral domain OCT, and a spatial carrier frequency which does not need optical path modulation is introduced in the transverse scanning direction. A detected interference spectrum signal is subjected to Fourier transform along the transverse scanning direction at first, then bandpass filtering centering on the amount of the spatial carrier frequency is carried out, then the filtered signal is subjected to inverse Fourier transform, and finally, the signal is subjected to Fourier transform along the axial direction to obtain full-range OCT images of a sample after mirror images are eliminated. By adopting the method and system, the full-range spectral domain OCT images can be obtained on the premise that any additional optical path difference is not introduced, and the sensitivity drop caused by accumulated optical path differences in the conventional spatial carrier frequency method is avoided.

The invention discloses a loop filtering method based on an image macro block coding mode decision, and is applied to an appeared diamond effect after video data flow over quantification / inverse quantization. The method comprises the following steps: (1) designing a model; (2) carrying out mode type classification on a present frame; (3) carrying out pre-filtering; (4) carrying out filtering; (5)determining whether to carry out loop filtering or not. According to the invention, characteristics of an image are fully taken into consideration, tedious decision of a present method is reduced andnoise brought by video compression is effectively filtered simultaneously, and realization complexity of a filter is reduced.

The invention provides a method for compressing a monitoring photograph. The method comprises the steps that firstly, a monitoring front-end device takes a candid photograph of a moving object to obtain the candid photograph of the moving object; secondly, the monitoring front-end device extracts the outline information of the moving object and sends the outline information and the candid photograph of the moving object to a storing device; thirdly, the storing device receives and stores the moving object candid photograph and the moving object outline information which are sent by the monitoring front-end device; fourthly, the storing device starts the compression for the candid photograph of the moving object according to the preset strategy; sixthly, the storing device cuts out the picture of the moving object from the candid photograph of the moving object according to the outline information of the moving object, stores the cut-out picture and deletes the candid photograph. According to the technical scheme, the purpose of compressing the candid photograph can be achieved, and meanwhile the quality of the image with the effective content of the photograph is not lowered.

The invention relates to a method for generating micro-codes, which is applicable to information embedded in an electronic file like PDF and the like and belongs to the field of information processing, and the method comprises the following specific processing steps: reading a document file which is represented in the form of an image and reading time authority representing the file, reading and modifying the authority, information safety management including file process management information and the like or additional information including file all content information; converting the additional information to codes in the form of micro-codes, and embedding the codes in the form of the micro-codes into the image; and outputting an image file. The method can realize the unification of electronic documents and printed documents and the integration of document notes and the information, carry out safety management on the documents, prevent the document notes from being falsified and form an automatic reading system of the document notes. The method is characterized by low introduction cost and convenient popularization.

A fusion determination processing unit 36-1 determines whether or not image quality has deteriorated as a result of fusion processing, which generates a fusion image by fusing a black-and-white imageand a color image with one another using a fusion processing unit 35-fb with the black-and-white image as a reference, on the basis of characteristics calculated by using a black-and-white image obtained by imaging an imaging subject using an imaging unit 21-BW, and a color image obtained by imaging the imaging subject from a different viewpoint position using an imaging unit 21-CR. In addition, when determined that the image quality has not deteriorated due to the fusion processing, the fusion determination processing unit 36-1 selects fusion image data generated by the fusion processing unit35-fb, and when determined that the image quality has deteriorated due to the fusion processing, the fusion determination processing unit 36-1 generates an image selection signal for selecting demosaiced image data generated by a demosaicing processing unit 34, and outputs the signal to an image selection unit 39. Thus, it is possible to generate a high-quality image by using images obtained by aplurality of imaging units.

A projector system comprising an illumination optical system (1), a color separation system (4) for separating light from the illumination optical system (1) into at least three colored light beams (R, G, B), the system further A modulation device (16, 18, 19) for modulating the colored beams is included for each colored beam, and a color combiner (20) for combining the modulated colored beams. The projector system includes a polarization conversion system (PCS) for at least one color beam and does not include a polarization conversion system for at least one other color beam.

Lossless video data compression is performed in real time at the data rate of incoming real time video data in a process employing a minimum number of computational steps for each video pixel. A first step is to convert each pixel 8-bit byte to a difference byte representing the difference between the pixel and its immediate predecessor in a serialized stream of the pixel bytes. Thus, each 8-bit pixel byte is subtracted from its predecessor. This step reduces the dynamic range of the data. A next step is to discard any carry bits generated in the subtraction process of two's complement arithmetic. This reduces the data by a factor of two. Finally, the 8-bit difference pixel bytes thus produced are subject to a maximum entropy encoding process. Such a maximum entropy encoding process may be referred to as a minimum length encoding process. One example is Huffman encoding. In such an encoding process, a code table for the entire video frame is constructed, in which a set of minimum length symbols are correlated to the set of difference pixel bytes comprising the video frame, the more frequently occurring bytes being assigned to the shorter minimum length symbols. This code table is then employed to convert the all of the difference pixel bytes of the entire video frame to minimum length symbols.

The invention discloses a method and a system for improving specific position resolution of aerial photography. A carrier mobile camera of the camera is followed, the normal shooting of the whole areais traversed according to the line, and a panoramic image is generated according to the shooting data; target identification is carried out according to the obtained image and the region of the positioning system; a partial target region is selected; the partial target region is analyzed, and the line is positioned accurately; then, according to positioning of the target region, a second photographing line of the camera carrier is planned; a target task is photographed or executed finely; partial photographing data is obtained; and a partial high-resolution image is generated. A partial high-resolution panoramic image is generated in combination with the panoramic image and the partial high-definition image and in fusion with the secondary data result. According to the method and the system for improving specific position resolution of aerial photography in the invention, the results for photographing twice are fused into a panoramic high-resolution photograph, which improves the photographing speed without reducing the image quality of the key target by photographing twice. Therefore, the ultimate goal of the present invention is to generate a partial high-resolution panorama byphotographing twice.

This invention provides a camera module which may reduce the focal length of a small lens without changing pixel number and does not generate the colour difference. A shooting component comprises at least three regions. A first region (10) of the shooting component (1) comprises a filer in which only the red light can be passed. A second region (11) of the shooting component (1) comprises a filer in which only the green light can be passed. A third region (12) of the shooting component (1) comprises a filer in which only the blue light can be passed. A lens component (2) comprises multiple lens part (21) corresponding to each region of the shooting component (1), respectively.

The invention discloses an electronic endoscope which comprises a light source device, a photographic device and a processor. The light source device is used for emitting an illumination light and anexciting light for an object to be photographed; the illumination light comprises a green narrow-band light; the exciting light is the light for exciting the object to be photographed to produce greenfluorescence; the photographic device comprises a first filter, a second filter and an image sensor; and the processor is used for generating a fluorescence image based on a fluorescence image signal, and / or generating a green narrow-band light image based on a green narrow-band light image signal, and / or generating a blending image based on the fluorescence image signal and the green narrow-bandlight image signal. According to the electronic endoscope provided by the invention, a green fluorescence signal and a green illumination light signal can be separated, so that the fluorescence imageand the green light image are imaged simultaneously.

For the purpose of removing wraparound artifacts without degrading image quality of an image, there are provided a phase correcting section (1072) for conducting phase correction processing on received signals in an actual scan based on a reference signal as a corrective signal received by one of a plurality of receive coils (1013), without applying a gradient magnetic field Gp in a phase encodingdirection, and an unfolding section (1075) for removing wraparound artifacts in an image based on the signals received by the plurality of receive coils (1013) in the actual scan and subjected to thephase correction processing by the phase correcting section (1072), and on the difference in sensitivity distribution among the plurality of receive coils (1013), so that the phase correction processing is conducted while preserving the relative phase relationship among the coils, and unfolding processing (removal processing) is conducted using the result of such phase correction processing.

The invention is suitable for the technical field of image noise reduction, and provides a noise reduction and sharpening combined processing method and device, and the method comprises the steps: importing image information, processing the image information, carrying out the noise reduction and sharpening of an image in a mode that the size of a processing window is dynamically variable, and completing the needed processing through the multiplication and addition operation as much as possible; data processing: extracting the same or similar operations of sharpening and noise reduction in the step 2, uniformly processing the operations, and carrying out resource sharing and dynamic allocation; noise reduction processing: performing noise reduction processing according to the edge information calculated in the above step, and outputting processed data or performing sharpening processing on the processed data; and S5, carrying out sharpening treatment. By unifying the processing methods of image noise reduction and image sharpening, the same or similar operators are used for processing, and the processing resources can be dynamically allocated on the implementation device, so that the image noise reduction or sharpening processing capability of a special scene can be greatly enhanced under the condition of reducing the cost.

The present invention provides a touch-type anti-glare film for display, having excellent blackness and sense of touch, and a polarizing plate and an image display device comprising the same.

The invention provides an image processing method and device and electronic equipment. The method comprises the following steps: acquiring an image of a to-be-loaded watermark contained in a webpage; creating a first Canvas object containing watermark information and a second Canvas object containing an image, and extracting first pixel information and second pixel information; adjusting the pixel value of the image based on the first pixel information and the second pixel information to obtain an image with watermark information; and replacing the image in the webpage with the image with the watermark information. In the mode, an image watermarking service does not need to be developed or purchased, so that the time cost, the labor cost and the capital cost can be reduced; the server can only store the original image and does not store the watermark-added image, and the image watermark processing flow is operated on the terminal equipment, so that the operation pressure of the server can be reduced, and the image quality is not reduced; meanwhile, the watermark added in the embodiment is a non-intrusive watermark and is difficult to find and clear by a person who steals the picture, so that the effect of preventing the picture from being stolen can be improved.

The invention discloses a method for compressing and saving images in a security inspection system and the security inspection system. The method comprises the following steps: acquiring a radiation image of an inspected object, including multi-column image data; removing blank areas in the radiation image except the part of the object image; and saving the image without the blank areas. By utilizing the method and the system, the data amount to be saved in the security inspection system can be remarkably reduced without reducing the image quality.

Lossless video data compression is performed in real time at the data rate of incoming real time video data in a process employing a minimum number of computational steps for each video pixel. A first step is to convert each pixel 8-bit byte to a difference byte representing the difference between the pixel and its immediate predecessor in a serialized stream of the pixel bytes. Thus, each 8-bit pixel byte is subtracted from its predecessor. This step reduces the dynamic range of the data. A next step is to discard any carry bits generated in the subtraction process of two's complement arithmetic. This reduces the data by a factor of two. Finally, the 8-bit difference pixel bytes thus produced are subject to a maximum entropy encoding process. Such a maximum entropy encoding process may be referred to as a minimum length encoding process. One example is Huffman encoding. In such an encoding process, a code table for the entire video frame is constructed, in which a set of minimum length symbols are correlated to the set of difference pixel bytes comprising the video frame, the more frequently occurring bytes being assigned to the shorter minimum length symbols. This code table is then employed to convert the all of the difference pixel bytes of the entire video frame to minimum length symbols.

The present invention discloses a financial bill image compression method and device. The method comprises: obtaining at least one key feature area from an original image; performing lossless compression of the at least one key feature area, and obtaining at least one key feature area compressed file; performing lossy compression of the original image, and obtaining the lossy compressed file of the original image; and generating a financial bill image compressed file according to at least one key feature area compressed file and the lossy compressed file of the original image. The financial bill image compression method and device perform lossless compression of a key feature area related to key information so that the image quality of the key feature area portion cannot be reduced, and the reliable identification of the key information is ensured; and moreover, the financial bill image compression method and device can perform lossy compression of an original image so as to greatly reduce the data bulk of the compressed file and reduce the memory occupied by the compressed file. The financial bill image compression method and device ensure the effective identification of the key information and improve the reliability of the bill identification while reducing the data bulk of the original image.