ActionShot
ActionShot is a method of capturing an object in action and displaying it in a single image with multiple sequential appearances of the object.
Additional names: action synopsis, motion synopsis, panoramic video synopsis, dynamic still, synopsis mosaic, stromotion.
Background
[edit]There are many methods for capturing panoramic images, some being fully manual or semi-automatic, and others completely automatic. However, the majority of these methods are for creating panoramic photos of a static landscape. In contrast, the capture of a dynamic scene — i.e. recording the motion of a moving object — is typically done by video recording.
ActionShot is a method that combines elements of both panoramic and video photography to create panoramic photos of dynamic scenes that take place over a wide-angle area. This involves capturing a moving object (e.g. a person running, riding a bicycle or skiing) and depicting multiple instances of this object over a single panoramic background.
Methods
[edit]Hardware
[edit]Stroboscopes have been used to create static images of an action. The moving object is illuminated by the periodic light flashes generated by the stroboscope and is shot by a stills camera using a long exposure. This results in a photograph that displays multiple images of the object along its path.
ActionShot photography is now available as part of camera application on Samsung Android Galaxy Premium Devices (Samsung Galaxy S and Samsung Galaxy S2) or by downloading the Nokia Smartcam app on the Microsoft Lumia Phones
Manual image editing
[edit]To create a dynamic panoramic image manually, a photographer needs to take several shots or still frames from a high-resolution video of a moving object and then combine them together using manual image registration, followed by manual image stitching. Image editing programs can assist in this process.[1]
Automatic image processing
[edit]Early digital image processing methods created a "synopsis mosaic" by building a panoramic image a video sequence where higher weights were assigned to the moving objects.[2] However, good image registration and stitching alone were not sufficient for creating a realistic image, because if the moving object overlaps itself, the combined result seems highly unnatural.[3] This in order to create eye-catching synopsis still images, and even videos, the moving objects are required not to overlap in the composed result.[4]
Related methods
[edit]See also
[edit]References
[edit]- ^ Kaan Kiran, Composing an Action Sequence Shot. DIYPhotography.net Photography and Studio Lighting. [1]
- ^ M. Irani, P. Anandan, J. Bergen, R. Kumar, and S. Hsu, Efficient Representations of Video Sequences and Their Applications . Signal Processing: Image Communication, special issue on Image and Video Semantics: Processing, Analysis, and Application, Vol. 8, No. 4, May 1996. [2]
- ^ Dynamic still examples
- ^ Y.Pritch, A.Rav-Acha, S.Peleg. Video Synopsis and Indexing.