نتایج جستجو برای: keyframe extraction
تعداد نتایج: 165810 فیلتر نتایج به سال:
Mobile Adhoc Network (MANET) is a fast deployable wireless mobile network with minimal infrastructure requirements. In these networks, autonomous nodes may function as routers. Due to the mobility of MANET nodes, network's topology dynamic. Recent scientific emphasis has been placed on security. Few attacks have discussed in existing literature. Wired networks provide more security choices than...
This paper presents an animation which simulates construction process by applying tower cranes to assemble shared steel forms in a site of six buildings. Only two sets of steel forms are provided. The animation is simulated based on the length of a cycle .and the number of cycles (a unit period of time) spent for sliding slabs down and moving cranes to next building's location. The first case s...
A video “fingerprint” is a feature extracted from the video that should represent the video compactly, allowing faster search without compromising the retrieval accuracy. Here, we use a keyframe set to represent a video, motivated by the video summarization approach. We experiment with different features to represent each keyframe with the goal of identifying duplicate and similar videos. Vario...
The representation of geometry in real-time 3D perception systems continues to be a critical research issue. Dense maps capture complete surface shape and can be augmented with semantic labels, but their high dimensionality makes them computationally costly to store and process, and unsuitable for rigorous probabilistic inference. Sparse feature-based representations avoid these problems, but c...
When detecting semantic concepts in video, much of the existing research in content-based classification uses keyframe information only. Particularly the combination between local features such as SIFT and the Bag of Words model is very popular with TRECVID participants. The few existing motion and spatiotemporal descriptors are computationally heavy and become impractical when applied on large...
Robot deployment in open snow-covered environments poses challenges to existing vision-based localization and mapping methods. Limited field of view and over-exposure in regions where snow is present leads to difficulty identifying and tracking features in the environment. The wide variation in scene depth and relative visual saliency of points on the horizon results in clustered features with ...
Forest fires are among the most critical natural tragedies threatening forest lands and resources. The accurate early detection of is essential to reduce losses improve firefighting. Conventional firefighting techniques, based on ground inspection limited by field-of-view, lead insufficient monitoring capabilities for large areas. Recently, due their excellent flexibility ability cover regions,...
Autonomous navigation of indoor unmanned aircraft systems (UAS) requires accurate pose estimations usually obtained from indirect measurements. Navigation based on inertial measurement units (IMU) is known to be affected by high drift rates. The incorporation of cameras provides complementary information due to the different underlying measurement principle. The scale ambiguity problem for mono...
Motion estimation based on point correspondences in two views is a classic problem in computer vision. In the field of laparoscopic video sequences even with state of the art algorithms a stable motion estimation can not be guaranteed generally. Typically, a video from a laparoscopic surgery contains sequences where the surgeon barely moves the endoscope. Such restricted movement causes a small...
Abstract: This paper presents a new online preprocessing strategy to detect and discard ongoing bad frames in video sequences. These include frames where an accurate localization between corresponding points is difficult, such as for blurred frames, or which do not provide relevant information with respect to the previous frames in terms of texture, image contrast and non-flat areas. Unlike key...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید