Sökning: "motion detection"

Visar resultat 1 - 5 av 139 avhandlingar innehållade orden motion detection.

1. 1. Social causality in motion : Visual bias and categorization of social interactions during the observation of chasing in infancy

   Författare :Martyna A. Galazka; Pär Nyström; Gustaf Gredebäck; Moritz Daum; Uppsala universitet; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; social causality; motion; animacy perception; chasing goal-directed motion; heat-seeking; EEG; P400; Nc; spatial proximity; non-contact causality; functional specialization; specialized perception; evolution; Psychology; Psykologi;

   Sammanfattning : Since the seminal work of Fritz Heider and Marienne Simmel (1944) the study of animacy perception, or the perception and attribution of life from the motion of simple geometrical shapes has intrigued researchers. The intrigue for psychologists and vision scientists then and today centered on the stark disconnect between the simplicity of the visual input and the universal richness of the resulting percept. LÄS MER

3. 2. Multidimensional MRI of Cardiac Motion : Acquisition, Reconstruction and Visualization

   Författare :Andreas Sigfridsson; Hans Knutsson; Stefan Skare; Linköpings universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; MRI; cardiac; motion; reconstruction; Image analysis; Bildanalys;

   Sammanfattning : Methods for measuring deformation and motion of the human heart in-vivo are crucial in the assessment of cardiac function. Applications ranging from basic physiological research, through early detection of disease to follow-up studies, all benefit from improved methods of measuring the dynamics of the heart. LÄS MER

4. 3. Local spatio-temporal image features for motion interpretation

   Författare :Ivan Laptev; KTH; []
   Nyckelord :computer vision; motion; recognition; scale-space;

   Sammanfattning : Visual motion carries information about the dynamics of ascene. Automatic interpretation of this information isimportant when designing computer systems forvisualnavigation, surveillance, human-computer interaction, browsingof video databases and other growing applications. LÄS MER

5. 4. Bring Your Body into Action : Body Gesture Detection, Tracking, and Analysis for Natural Interaction

   Författare :Farid Abedan Kondori; Li Liu; Juyang Weng; Umeå universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Human Well-Being; Bodily Interaction; Natural Interaction; Human Motion Analysis; Active Motion Estimation; Direct Motion Estimation; Head Pose Estimation; Hand Pose Estimation.; signalbehandling; Signal Processing; datoriserad bildanalys; Computerized Image Analysis;

   Sammanfattning : Due to the large influx of computers in our daily lives, human-computer interaction has become crucially important. For a long time, focusing on what users need has been critical for designing interaction methods. LÄS MER

7. 5. Evidence for "liveness" in face biometrics

   Författare :Klaus Kollreider; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Motion estimation; Optical flow of lines; Quangles; Object detection; OFL; Liveness detection; Anti-spoofing measures; Structure tensor; Quantized angle features; Face biometrics;

   Sammanfattning : Aliveness or "liveness" detection is a novel but crucial topic in biometrics. In this study we will investigate it for face biometrics. The problem is given by the real-time requirements of such a system to be able to avert advanced spoofing attempts, e.g. LÄS MER