1168 results about "JPEG" patented technology

A watermarking method involves mostly invisible artifacts and is sensitive to any modification of the picture at the level of precision rendered by the compressed version of the image. The image is compressed according to a known compression standard, such as the JPEG standard, and with a fixed quality setting. Using the JPEG standard, the original image is cut into blocks to which the Discrete Cosine Transform (DCT) is applied and the DCT coefficients quantized. The watermark according to the invention is applied to the quantized DCT coefficients. This is done using an encryption function, such as a secret key/public key algorithm. The JPEG compression is then completed using a lossless compression scheme, such as Huffman coding, to produce the compressed and watermarked image. Authentication of the compressed and watermarked image begins with a lossless decompression scheme to obtain the set of quantized DCT coefficients. The coefficients are authenticated, and the DCT output of each block is dequantized. If necessary, an inverse DCT is applied to each block to output the decompressed watermarked image.

A digital watermarking process whereby an invisible watermark inserted into a host image is utilized to determine whether or not the image has been altered and, if so, where in the image such alteration occurred. The watermarking method includes the steps of providing a look-up table containing a plurality of coefficients and corresponding values; transforming the image into a plurality of blocks, wherein each block contains coefficients matching coefficients in the look-up table; and embedding the watermark in the image by performing the following substeps for at least some of the blocks: First, a coefficient is selected for insertion of a marking value representative of a corresponding portion of the watermark. Next, the value of the selected coefficient to used to identify a corresponding value in the look-up table. Finally, the identified coefficient is left unchanged if the corresponding value is the same as the marking value, and is changed if the corresponding value is different from the marking value. After the insertion of the watermark, the image may be stored in a lossy-compression form, thus permitting efficient storage and distribution. Moreover, the method may be used to produce two output signals for authentication: (1) a meaningful pattern to facilitate a quick visual check, and (2) an additional signal to detect unauthorized alteration. The method can be applied to an image compressed using JPEG or other techniques, such as Wavelet compression, and the marked image can be kept in the compressed format. Any alteration made on the marked image can be localized, making the method suitable for use in a "trustworthy" digital camera or camcorder.

FIG. 1 is a diagram of an unmanned, fully automatic, security installation with electronic pan and tilt functions, the focal plane array based motion sensor (120) of the hybrid simultaneous-mode MPEG X/JPEG X security video camera (100) is positioned to capture moving suspects, the moving suspect (800) is shown, the local area network (LAN) cable (804) is shown leading away from the hybrid MPEG X/JPEG X security video camera (100), a security room personal computer viewing station (808) is shown, lastly a digital computer tape video logging station (816) is shown.

A process for distributing digital still images according to a nominal format, where each image is broken into blocks and macroblocks that depend upon each other by correlation coefficients including analyzing contents of the still images to generate two parts: a) a primary contents in nominal format corresponding to the image as modified by substitution of certain correlation coefficients with coefficients that are of the same type, but which are random, and b) additional digital nature of any format, which includes substituted correlation coefficients and digital data that are likely to allow reconstruction of the modified image; transmitting separately the modified primary contents in real or deferred time and additional digital information in real time at a moment of viewing from a server towards recipient equipment; and calculating a synthesis of contents of the recipient equipment that is in nominal format as a function of the modified primary contents and the additional data.

A medical wireless capsule-type endoscope system comprises a swallowable wireless endscope capsule (100A) and a portable image recording device (100B). The wireless endoscope capsule (100A) includes an image sensor (5), the first microprocessor (6) for transforming the image information into a compressed JPEG format, the first RF transceiver module (9) and an antenna (10). The portable image recording device (100B) includes an antenna (100F), the second RF transceiver module (13) and the second microprocessor (14). The system also includes a wireless terminal (100G) which is connected to a medical imaging workstation (100E) to exchange information between the system and the medical imaging workstation (100E).

Apparatus and methods are provided for entering compressed data streams at selected reentry points to initiate decoding thereby allowing efficient manipulation of the compressed data and minimizing storage requirements. The reentry information preferably includes bit-level pointers and sufficient state information to initialize the decoder properly. This enables decoding without having to resume at independently decodable points, such as JPEG restart markers. For example, in the context of a JPEG image, in addition to the typical information available to the decoder that has been passed in earlier markers, the reentry information for a given MCU boundary may include: a bit-level pointer to the first block's DC Huffman code, the position of the output, and a DC predictor for each component of the MCU. This allows decompression to be performed in the appropriate order to accomplish various data manipulation operations, such as rotation, thus significantly reducing buffering requirements. Reentry information into a compressed data stream can be generated during encoding, decoding, partial encoding, partial decoding, entropy encoding, and/or entropy decoding. In addition, a reentry decoder may quickly interpret the compressed data sufficiently to preserve desired reentry information and discard unneeded output of the decoding process and terminate immediately after the last desired reentry point. This enables buffering of pieces of compressed data with associated reentry information rather than buffering the entire decompressed data. Additionally, when a subset of the reconstructed data is needed the step of recompressing the individual pieces can be avoided by saving reentry information with the associated pieces of compressed data.

A network camera apparatus is disclosed including an image requisition unit which obtains an analog signal of an image and converts this into digital format; an image compression unit which utilizes standard image compression techniques (JPEG, MJPEG) to decrease the data size; an image processing unit which analyzes the compressed data of each image, detects motion from compressed data, and identifies background and foreground regions for each image; a data storage unit which stores the image data processed by the image processing unit; a traffic detection unit which detects the traffic amount of the network and decides the frame rates of the image data to be transmitted; and a communication unit which communicates with the network to transmit the image data and other signals.

The invention discloses a hybrid image compressing method based on block classification. In the invention, blocks are divided into text/ image block, natural image block and hybrid block according to different features of text/image area and natural image area of original images in the aspect of color and texture; then a compression mode in which palette coding, Hextile coding and LZW coding are combined is used in the text/ image block, a JPEG lossy compression mode is used in the natural image while the algorithm of the combination of the two modes is used in the hybrid block. The invention has the advantages that based on the block classification method, the text/image area and the natural image area can be divided up accurately, and that the blocks are respectively encoded can keep rather acuminate edge of the text/image block so as to enhance visual effect on the basis of ensuring higher compression efficiency and upgrade the peak signal to noise ratio of reconstructed images; the complexity of the algorithm is lower.

Systems, methods, and processes are provided for locating pupils in a portrait image for applications such as facial recognition, facial authentication, and manufacture of identification documents. One proposed method comprises three steps; skin detection, eye detection, and pupil detection. In the first step, the skin detection employs a plurality of Gaussian skin models. In the second step, coarse eye locations are found by using the amount of deviation in the R (red) channel with an image that has been cropped by skin detection. A small block centered at an obtained coarse location is then further processed in pupil detection. The step of pupil detection involves determining a Pupil Index that measures the characteristics of a pupil. Experiments tested on highly jpeg compressed images show that the algorithm of this embodiment successfully locates pupil images. It is believed that this novel technique for locating pupils in images can improve the accuracy of face recognition and/or face authentication.

A cellular phone is provided with a media scanning capability. Scanner optics, an optional light source and related scanning circuitry is integrated within a cellular phone to enable image or text scanning, facsimile, text-to-speech conversion, and language translation. Position sensors provide position data as the scanner is manually moved, in one or more passes across the scanned media, to enable a bit-mapped image of the strip to be created in a data buffer. Image data from the strips is processed to remove redundant overlap data and skew position errors, to give a bit-mapped final image of the entire scanned item. Image compression is provided to compress the image into standard JPEG format for storage or transmission, or into facsimile format for transmission of the document to any fax machine. Optical character recognition (OCR) is provided to convert image data to text which may be sent as email, locally displayed, stored for later use, or further processed. Further processing of text data includes language translation and text to speech conversion of either the original or translated text. The resulting speech audio can be heard locally or transmitted over the cellular network.

This invention has as its object to provide an image processing apparatus and method which can efficiently compress an image while maintaining high image quality, and a storage medium for implementing the method. To accomplish this, an apparatus has a text area detector (101) for extracting a text area from multi-valued image data, and generating text area coordinate data (109) as position data of the text area, a binarization unit (102) for generating binary image data (108) by binarizing multi-valued image data of the text area, a color computation unit (103) for generating text color data (110) by computing a representative color of the text area, a text paint unit (104) for generating non-text multi-valued image data A by converting multi-valued image data of the text area using multi-valued image data of an area other than text, a reduction unit (105) for generating reduced non-text multi-valued image data by lowering the resolution of the non-text multi-valued image data, a JPEG compression unit (106) for compressing the non-text multi-valued image data by JPEG, and an MMR compression unit for compressing the binary image data of the text area by MMR.

A system is described for transmitting video signals over various communication media using digital signal processing techniques. An embodiment of the system uses an orthogonal frequency division multiplexing (OFDM) modulation process that enables high-speed data communications of Ethernet and/or MPEG or JPEG or H264 compressed or uncompressed digital video. A second embodiment frequency modulates the OFDM modulated signal (FM-OFDM). The first and second embodiments are implemented with a transmit Ethernet interface, an MPEG or JPEG or H264 compressed or uncompressed digital video capture device, and a modem including a modulator and demodulator that provides communication with several other modem devices along communication media such as power lines, wireless (air), cable, or twisted pairs.

The present invention provides a selector on the body of a digital camera that permits a user to select a resolution for a JPEG image that is generated from a RAW image and is embedded in the RAW image's data structure. The user may select from available embedded JPEG resolutions of, for example, 1440×960, 2304×1536, or 3024×2016. The present invention also provides a display on the digital camera that shows the user which of the available JPEG resolutions currently selected.

A method for transmitting formatted content to a mobile device having a small display screen comprises retrieving a page of formatted content, rendering the page as a graphic such as a JPEG that is sized for display on the small display screen, and transmitting the graphic to the requesting device for display. Hyperlinks are collected and sent with the graphic and are presented as menu options on the device for selection by a user. The user may then request a zoom-in to a portion of the graphic and have a corresponding portion of the page transmitted to the device. The returned web page portion operates as a typical formatted content page, permitting the user to read the contents, select a hyperlink or enter data into a form. A method for displaying a large graphic files on a mobile device having a small display screen comprises requesting the graphic file from a server, in response to the request, receiving the graphic file scaled for display and an identification of portions of the graphic file; displaying said graphic file and an overlaid grid corresponding to said identification of portions of said graphic file. Using the grid, a portion of the graphic file is selected and requested from the server, received and displayed.

Along with a first file (501) for recording management data (506), a second file (503) for recording ordinary digital broadcast (508), ordinary broadcast with program-link-type data broadcast (509), independent-type data broadcast (510), audio broadcast (511) and so on, there are provided a third file (504) for recording analog broadcast video/audio data, and a subsidiary file for recording various data. The subsidiary file is able to record data for various usages, including MPEG video data (513), MPEG audio data (514), JPEG data (515), PNG data (516), MNG data (517), BML data (518), game data (519), electronic program guide data (520), and so on. According to this configuration, various information such as digital broadcast without data broadcast, ordinary broadcast with program-link-type data broadcast, independent-type data broadcast, audio broadcast, text broadcast, analog broadcast, and broadcast-related Internet information can be easily recorded on a video recorder such as DVD. Further, the recorded data can be copied or moved after converting the format to enable the recorded data to be DVD reproduced with other equipment, rapidly transmitted, deleted, or edited. The recorded data can also be partially retrieved for reuse.

The present invention provides a system and method of providing personal and medical information in a portable manner. The present invention also allows the user to easily update and modify the information contained in the device. Briefly, a storage element, preferably having a standard computer interface, most preferably a USB port, is disclosed. Sets of data structures that allow the user to incorporate information about their medical history and profile are provided on the storage element. The data structures also allow the user to enter images, such as jpeg, tiff or bitmap files, to further augment their history. These data structure also allow the health care provider to quickly and easily access the relevant information in a timely and organized manner. The storage element also contains the required software application needed to view the data structures.

A process is provided to prepare production data for a print job. In one embodiment of the present invention, the production data includes an electronic document defined by a page description language (PDL). The electronic document is stored in a PDL image file, such as a Postscript file, a PDF file, or the like. A still image proxy, which may be a JPEG file, a GIF file, a PNG file, or the like, is created of the PDL image file. An image display of the still image proxy is electronically manipulated. Information about the manipulations are recorded and subsequently used to revise the PDL image file so as to match the PDL image file to the manipulations made to the image display of the still image proxy.

A digital camera produces RAW data of a captured image through A/D conversion of an analog image signal outputted from an image sensor, and also detects human faces from the captured image based on the RAW data, to produce face data on the detected human faces. The digital camera records an image file that is produced from the RAW data, the face data, JPEG data of a thumbnail of the captured image and image processing parameters which are preset in the digital camera or determined by the digital camera regardless of the face area data. An image processing apparatus obtains the image file, and processes the RAW data with the attached image processing parameters, or calculates a gamma parameter based on the face data and the RAW data, to use the calculated gamma parameter for optimizing the gradation of the detected human faces.

The present invention relates to the field of downscaling and blending of two high resolution images, and particularly to a device and a method allowing for downscaling and blending of a HD JPEG background image and a HD bitmap image, which is overlaid on the JPEG background image. The device comprises means for downscaling the background image by a pre-determined factor n1, n2, . . . n_N; means for uncompressing the downscaled background image and the high-resolution bitmap image; means for dividing the uncompressed high-resolution bitmap image into blocks of n1×n2× . . . ×nN pixels, whereby the size of each block correspond to the size of each pixel of the downscaled background image; and, means (16) for blending each of the blocks of the uncompressed high-resolution bitmap image with each of the pixels of the downscaled background image and thus producing a blended image.

An electronic Yellow Pages viewer shows the pages of a Yellow Pages directory as they appear in the bound version. The print queue used to print the bound version is intercepted, and each page is rasterized into a JPEG file or otherwise converted into an image file. The page/header/advertisement data are parsed to create an index which associates each Yellow Pages heading with the first page on which that heading appears. The viewer runs as a Java applet inside a World Wide Web browser and allows a user to access a page by typing the name of a heading, selecting the heading from a tree view or typing a page number. A Yellow Pages advertiser receives an electronic bill with an electronic tear sheet showing the page on which the advertisement appears. The bill can also include one or more of the reverse page, the opposite page, or other pages in the same heading. The advertisement can be selectively highlighted.