digital video watermarking and the collusion attack

... methodological and theoretical issues that have emerged in the research process using video data The broad aim is to signal the need to address these complex and intriguing issues explicitly, as video ... students For Harklau two of the comparative points were (a) the potential differences between what went on in the mainstream lessons and in the EAL lessons, and (b) the known and theorised knowledge ... team than to the participant teachers and students in the study After all, the participant teachers and students in the subject lessons were there to work on the subject content, not the English

Ngày tải lên: 30/06/2017, 21:33

... Trang 2Digital Video QualityVision Models and Metrics Stefan Winkler Genista Corporation, Montreux, Switzerland Trang 4Digital Video QualityTrang 6Digital Video QualityVision Models and Metrics ... influence subjective quality and describe procedures for its measurement Then we review the history and state of the art of video quality metrics and discuss the evaluation of their prediction performance ... assessment We will discuss the design of models and metrics and show examples of their utilization The models presented are quite general and may be useful in a variety of image and video processing applications

Ngày tải lên: 14/08/2014, 12:21

... at the top (center image) and at the bottom (right image) The noise is clearly visible in the sky, whereas it is much harder to see on the rocks and in the water due to the strong masking by these ... experiments The horizontal axis shows the log of the masker contrast CM, and the vertical axis the log of the target contrast CT at detection threshold The detection threshold for the target stimulus ... match if they produce the same absorption rates in the L-, M-, and S-cones If the spectral sensitivities of the three cone types (see Figure 2.5) are represented by the rows of a matrixR, the absorption

Ngày tải lên: 14/08/2014, 12:21

... measuring the amount and orientation of activity in each of these blocks are then computed from the spatial luminance gradient To measure the distortion, the features from the reference and the distorted ... contrast sensitivity and masking with the help of spatial filtering and Sobel-operators, respectively Then the PSNR of the masked error signal is calculated and normalized The interesting part ... bands The lower one goes in higher-frequency, the more spatially uniform the low-pass band in the denominator will become in both measures, finally approaching the overall luminance mean of the

Ngày tải lên: 14/08/2014, 12:21

... primaries Digital video is usually coded in Y0C0BC0Rspace, where Y0 encodes luminance, C0B the difference between the blue primary and luminance, and CR0 the difference between the red primary and ... luminance The PDM on the other hand relies on the theory of opponent colors for color processing, which states that the color information received by the cones is encoded as white-black, red-green and ... present implementation, the basis filters have octave bandwidth and octave spacing Five sub-band levels with four orientation bands each plus one low-pass band are computed; the bands at each level

Ngày tải lên: 14/08/2014, 12:21

... namely the 50-Hz and 60-Hz scenes, the low- and high-quality conditions as defined for the subjective experiments, the H.263 and non-H.263 sequences (conditions 15 and 16), the sequences with and ... image, and the other one the original Subjects had to identify the distorted image, and the percentage of correct answers was recorded for varying noise intensities (van den Branden Lambrecht and ... by the psychometric functionPðCÞ ¼ 1  0:5 eðx=
Þ; ð5:1Þ where PðCÞ is the probability of a correct answer, and x is the stimulus strength;
and  determine the midpoint and the slope of the

Ngày tải lên: 14/08/2014, 12:21

... measure the perceived distortion caused by these different types of artifacts and to determine their influence on the overall quality degradation Due to the popularity of the MPEG standard in digital ... experiments on blockiness The second is the combination of the PDM with object segmentation The necessary modifications of the metric are outlined, and the performance of the segmentation-supported ... accelerations and unpredictable motion (Eckert and Buchsbaum, 1993; Hearty, 1993) On the other hand, tracking a particular movement will reduce the spatial acuity for the back-ground and objects

Ngày tải lên: 14/08/2014, 12:21

... depending on the implementation choices made for the color space and the pooling algorithm The design of the decomposition filters on the other hand only has a negligible influence on the prediction ... respect to the capture, display, storage and transmission of visual information is one of the biggest challenges in the field of image and video processing Understanding and modeling the characteristics ... Mb/s, the MPEG-4 codec (condition 6) outperforms conditions 1, 3, and 8 It should be noted that the Intel Indeo Video codecs and the Sorenson Video codec were designed for lower bitrates than the

Ngày tải lên: 14/08/2014, 12:21

... A by the points G, in the configuration 2 The results that the DIC program yields for this process are the displacements u*, and v, and the displacement gradients u,’, v,*,, u,‘, and v,“, These ... pictures of the body, each associated with the configurations 1, 2 and 3 of the sequential deformation Trang 20Between image 1 and 2 (deformation A) and between images 2 and 3 (deformation B), the program ... bonded together by a rubber phase called the matrix Failure in all these materials is heavily dependent upon the interaction between the particles and the matrix, specifically on the separation

Ngày tải lên: 29/11/2014, 07:05

... job creation and infrastructural strengthening, but the development is uneven The development path of the country begins to follow the demands of the TNC rather than the objectives of the state ... Batam and offices in Singapore These interviews and other information gathered from firm offices provided ample information for case studies of two of the firms that represent the state-firm collusion ... proximity to the islands of Rempang and Gelang, also part of the Riau Archipelago These three islands combine to form the great Batam area of BARELANG Connected by a series of bridges, the area covers

Ngày tải lên: 14/05/2015, 14:24

... distribution of the close loop system with the 4.24 Step-up response comparison of the analog system and the digital 4.25 Restrict the voltage error inside the ±2V range and reduce the word 4.28 The duty ... clamped at the input age or the output current, therefore the stress level of the components and also the Trang 26volt-conduction loss is low The simple configuration and the effective use of the circuitparasitics ... [5], and [6].• When the system operates in the storage mode, the bi-directional convertertransfers power from the fuel cell to the battery or ultra-capacitor, and theenergy is stored there On the

Ngày tải lên: 12/09/2015, 08:20

... bust We saw the housing boom, and the housing bust We saw the financial crisis, and the global recession, and the euro crisis, and Lehman Brothers, andLong-Term Capital Management, and Cyprus ... transfers the coin to the next by digitally signing a hash ofthe previous transaction and the public key of the next owner and adding these to the end of the coin.A payee can verify the signatures ... engulfing the words ONE and In God We Trust, along with the two sides of the great seal ofthe U.S government, the outstretched eagle on the right and the Eye of Providence perched above apyramid on the

Ngày tải lên: 23/05/2018, 13:30

... Cohen’s Globalization and Its Enemies) and on the global digital divide (e.g., Warschauer’s Technology and Social Inclusion: Rethinking the Digital Divide and Norris’s Digital Divide: Civic Engagement, ... Information Poverty, and the Internet Worldwide ), but these texts tend to represent the perspectives of the wired nations of the world In order to gain the understanding needed to addressthe complex ... corners of the globe Understanding Other Cultures Companies are expanding operations to other nations and are following the new trend of outsourcing to do so “However, expanding operations to other

Ngày tải lên: 04/03/2019, 16:44

... manufacturing The size of the organization makes no difference to the thief The larger the organization, the more the theft occurs and the greater the opportunity for losses The more valuable the product, ... viewed live and/ or recorded When there is activity in the camera area the video and audio signals are switched to the monitor and the guard sees and hears the activity in the scene and initiates ... toward the camera and intercepted and collected by the camera lens As a general rule, the larger the lens diameter, the more light will be gathered, the brighter the image on the sensor, and the...

Ngày tải lên: 01/06/2014, 07:52

... The Videomaker Guide to Digital Video and DVD Production Second Edition The Videomaker Guide to Digital Video and DVD Production Second Edition From the Editors of Computer Videomaker ... gear, digital video is the future Right now, the two major players on the digital front are the firmly established Mini DV and the somewhat established Digital8 And the experimental new video formats ... with the same lens, at the same distance from the subjects, and focused on the same person, the woman The only variable is the aperture As you can see, the higher the f stop, the greater the depth...

Ngày tải lên: 01/06/2014, 11:26

... further expand opportunities for cybercriminals and other threat actors to gain profit, steal information, and sabotage their targets’ operations Our 2013 forecasts: The volume of malicious and ... scanning in the form of Bouncer was first introduced in February and integrated into devices with the use of the latest Android version—Jelly Bean (Android 4.2)—later in the year The improved ... between Android attackers and security providers is likely to occur in the coming year, much as one occurred a decade or more ago over Microsoft Windows Google has made improvements to the Android...

Ngày tải lên: 17/02/2014, 21:20

... registers The C67xx (such as the C6701, C6711, and C6713) belong to the family of the C6x floating-point processors, whereas the C62xx and C64xx belong to the family of the C6x fixed-point processors The ... using many of the examples and experiments from Chapters 1–7 and Chapter The beginning of the semester can be devoted to short programming examples and experiments and the remainder of the semester ... on and generate a 1-kHz tone Connect the LINE OUT (or the HEADPHONE) on the DSK board to a speaker or to an oscilloscope and verify the generation of the 1-kHz tone The four connectors on the...

Ngày tải lên: 15/03/2014, 17:20

... some of the examples shown here, it is wise for you, as the video producer, to learn about the values of the company you work for, how they use their brands, and who their customers are Then you ... became part of Wells Fargo The video department would gather the news stories and then upload them via the Internet to the main office When there was a need for live coverage, they would hire a satellite ... editing of the video, you could phone them and ask them how they want their names to appear on the screen Do they have a particular title or company name they want to include? Would they like...

Ngày tải lên: 30/05/2014, 23:13

... methods they should be mindful of their own safety and the safety of others, including parties for whom they have a professional responsibility To the fullest extent of the law, neither the Publisher ... (generally after the first scene) • At the end of the movie (a closing title sequence) • At the beginning and at the end of the movie (an opening and closing title sequence) At the beginning of the movie ... further understand the unfolding of the movie As a result, title cards should be simple and not too elaborate They should not overcome the content of the footage and become a distraction to the...

Ngày tải lên: 30/05/2014, 23:22

... demonstrate the difference in the outcome As the final step of configuring the FP, align and distribute the objects using the appropriate buttons on the FP toolbar To set the outputs, locate and place ... stop the loop programmatically 25 Lab As the final step, tidy up the wires, nodes and terminals on the BD using the Align object and Distribute object options on the BD toolbar Then, save the VI ... generating the sum and the other the average of two input values The inputs are created by locating two Numeric Controls on the FP This is done by right-clicking on an open area of the FP to bring up the...

Ngày tải lên: 01/06/2014, 01:13