The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Cricket broadcast video analysis has had difficulty identifying aspects of the content such as the type of batting stroke or the direction of the field played towards. Here we construct a composite feature combining Optical flow analysis along with camera view analysis to model the type of shots played. The work first presents an improved camera shot analysis based on learning parameters from a small...
In this paper, we focus on generating compact but efficient video signatures on mobile devices so that users quickly know whether there are near-duplicates in the social network systems when they upload a video. For this, the proposed method employs the idea of inverted index that is one of the most popular text retrieval methods. Experimental results show that our method can achieve similar results...
In current media-centric society, video has become the suitable cover for steganography. However, video steganalysis remains largely unexplored compared to the mature image steganalysis. One open problem is how to design efficient rich features for video steganalysis by exploiting the correlations in video. In this paper, we propose a novel video steganalytic scheme based on the spatial-temporal correlation...
Selective video encryption provide low encryption time by selection of sensible bits from the video codec, which is well suited for real time application like live TV, video conferencing, video telephony, video conferencing etc. During AVC encoding, such sensitive data as NZs in CAVLC, intra-prediction slice and motion vector are encrypted with the use of standard AES algorithm. Perceptual encryption...
A technique to create High Dynamic Range (HDR) video frames is to capture Low Dynamic Range (LDR) images at varying shutter speeds. They are then merged into a single image covering the entire brightness range of the scene. While shutter speeds are often chosen to vary by a constant factor, we propose an adaptive approach. The scene's histogram together with functions judging the contribution of an...
It is not uncommon to see several videos of almost identical content on the internet. These near duplicates, coupled with the sheer number of videos, pose a big challenge to the effective organization of video clips online. We propose an adaptive classification approach to detect near-duplicate versions, and an integrated voting strategy to group clusters and to elect a representative for each cluster...
Design of video storyboards has emerged as a popular research area in the multimedia community. Different pattern clustering techniques are applied to extract the key frames from a video sequence to form a storyboard. In this paper, we propose an automatic method for the selection of key frames of a video sequence using Delaunay graphs. We prune certain edges from the Delaunay graph using an iterative...
Pedestrian detection is an important feature in an advanced, automated video surveillance system. Unfortunately in most situations cameras are mounted in a way that, due to perspective, walking humans are occluded by each other or stationary objects and detecting a whole silhouette is not possible. But heads and shoulders are not occluded in most cases and can be used for object classification (human...
This paper proposes a hierarchical and probabilistic approach for interframe motion estimation to eliminate unwanted camera motions. This approach adopts three hierarchies, local motion estimation, region motion estimation, and global motion estimation. The local motion is described as a probability distribution for randomly selected local patches. The region motion is defined as maximum likelihood...
In this paper, we propose an error concealment algorithm based on non-uniform Lagrange interpolation for H.264 standard. To increase the accuracy of error concealment algorithm we utilize the 4 4 pixel block interpolation mode supported by H.264 standard, each of 4 4 pixel block has several directional interpolation modes, total MV (Motion Vector) directional histogram of all candidate interpolation...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.