... Alex Rav-Acha Yael Pritch Dani Lischinski Shmuel Peleg The Hebrew University of Jerusalem Jan... more ... Alex Rav-Acha Yael Pritch Dani Lischinski Shmuel Peleg The Hebrew University of Jerusalem January 26, 2005 ... Specifically, we manipulate the time flow of a video sequence by sweeping an evolving time front surface through the video's aligned space-time volume. ...
... (d) Snap Composition results. Note that the “pink” girl has been shifted down automatically f... more ... (d) Snap Composition results. Note that the “pink” girl has been shifted down automatically for better composition. In all the experiments we avoided using photometric blending, in order to show the pure effect of Snap Composition. ...
Panoramic stereo pictures are created by stitching together frames taken from a single moving vid... more Panoramic stereo pictures are created by stitching together frames taken from a single moving video camera. Stereo panoramas can be created up to a full 360 degrees. The mosaicing process is robust and fast, and can be performed in real time. Mosaicing starts by computing the motion between the video frames. The video frames, together with the motion between frames
AbstractMillions of surveillance cameras record video around the clock, producing huge video arc... more AbstractMillions of surveillance cameras record video around the clock, producing huge video archives. Even when a video archive is known to include critical activities, finding them is like finding a needle in a haystack, making the archive almost worthless. Two main ...
Abstract. An online approach is proposed for Video registration of dynamic scenes, such as scenes... more Abstract. An online approach is proposed for Video registration of dynamic scenes, such as scenes with dynamic textures, moving objects, motion parallax, etc. This approach has three steps: (i) Assume that a few frames are already reg-istered. (ii) Using the registered frames, the ...
It has been observed that in most videos recorded by surveillance cameras the image size of an ob... more It has been observed that in most videos recorded by surveillance cameras the image size of an object is a linear function of the y coordinate of its image location. This simple linear relationship holds in the most common surveillance camera configurations, where objects move on a pla-nar surface and the camera's X axis is parallel to that plane. This linear relationship enables us to easily perform and enhance several geometric tasks based on tracking an object over a few frames: (i) computing the horizon ; (ii) computing the relative real world sizes of objects in the scene based on their image appearance; (iii) improving tracking by constraining an object's location and size. When the the camera's X axis is not parallel to the ground plane, after tracking a couple of objects it is possible to find the rotation which rectifies the video so that its new X axis is parallel to the ground plane.
... Alex Rav-Acha Yael Pritch Dani Lischinski Shmuel Peleg The Hebrew University of Jerusalem Jan... more ... Alex Rav-Acha Yael Pritch Dani Lischinski Shmuel Peleg The Hebrew University of Jerusalem January 26, 2005 ... Specifically, we manipulate the time flow of a video sequence by sweeping an evolving time front surface through the video's aligned space-time volume. ...
... (d) Snap Composition results. Note that the “pink” girl has been shifted down automatically f... more ... (d) Snap Composition results. Note that the “pink” girl has been shifted down automatically for better composition. In all the experiments we avoided using photometric blending, in order to show the pure effect of Snap Composition. ...
Panoramic stereo pictures are created by stitching together frames taken from a single moving vid... more Panoramic stereo pictures are created by stitching together frames taken from a single moving video camera. Stereo panoramas can be created up to a full 360 degrees. The mosaicing process is robust and fast, and can be performed in real time. Mosaicing starts by computing the motion between the video frames. The video frames, together with the motion between frames
AbstractMillions of surveillance cameras record video around the clock, producing huge video arc... more AbstractMillions of surveillance cameras record video around the clock, producing huge video archives. Even when a video archive is known to include critical activities, finding them is like finding a needle in a haystack, making the archive almost worthless. Two main ...
Abstract. An online approach is proposed for Video registration of dynamic scenes, such as scenes... more Abstract. An online approach is proposed for Video registration of dynamic scenes, such as scenes with dynamic textures, moving objects, motion parallax, etc. This approach has three steps: (i) Assume that a few frames are already reg-istered. (ii) Using the registered frames, the ...
It has been observed that in most videos recorded by surveillance cameras the image size of an ob... more It has been observed that in most videos recorded by surveillance cameras the image size of an object is a linear function of the y coordinate of its image location. This simple linear relationship holds in the most common surveillance camera configurations, where objects move on a pla-nar surface and the camera's X axis is parallel to that plane. This linear relationship enables us to easily perform and enhance several geometric tasks based on tracking an object over a few frames: (i) computing the horizon ; (ii) computing the relative real world sizes of objects in the scene based on their image appearance; (iii) improving tracking by constraining an object's location and size. When the the camera's X axis is not parallel to the ground plane, after tracking a couple of objects it is possible to find the rotation which rectifies the video so that its new X axis is parallel to the ground plane.
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