Method for reading a recorded moving scene, in particular on a videodisk, and application of said method to driving simulators
First Claim
1. A method for creating an optical sensation of a moving apparatus speed by reading images representing a moving scene previously recorded at a predetermined nominal speed Vnom in the form of frames in which said images are displayed by reading successive frames each corresponding to one image, said successive frames being read consecutively to follow each other at a predetermined rate corresponding to the nominal speed of displacement of the moving scene, said method comprising the steps of:
- simulating an apparent speed V at which said moving scene is required to travel, and representing said apparent speed as a function which expresses the speed ratio of said apparent speed V to said nominal speed Vnom by a number of recorded frames to be skipped or to be repeated periodically at the time of reading;
electronically selecting the images to be read in accordance with said function which contains a first term expressing a whole number M of frame jumps at each reading and a second term expressing a fractional part of said speed ratio, either added to or subtracted from the first term, said fractional part being formed by a whole number N representing the number of times a subsequent frame is to be skipped or repeated in a series of frames comprising a predetermined number K of frames.
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Accused Products
Abstract
In a method for reading a moving scene previously recorded in the form of successive images, the images are restituted by successive reading frames each corresponding to one image, the frames being intended to follow each other at a predetermined rate corresponding to a nominal speed of displacement of the moving scene. The method essentially consists:
in defining an apparent speed at which the moving scene is required to travel,
in automatically determining a function which expresses the ratio of the apparent speed V to the nominal speed Vnom by a number of recorded images to be skipped or to be repeated periodically at the time of reading,
and in automatically initiating transfer from one image to another at each reading frame by a program which takes said function into account including a fractional portion of the number of images to be skipped or to be repeated at each reading frame.
12 Citations
8 Claims
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1. A method for creating an optical sensation of a moving apparatus speed by reading images representing a moving scene previously recorded at a predetermined nominal speed Vnom in the form of frames in which said images are displayed by reading successive frames each corresponding to one image, said successive frames being read consecutively to follow each other at a predetermined rate corresponding to the nominal speed of displacement of the moving scene, said method comprising the steps of:
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simulating an apparent speed V at which said moving scene is required to travel, and representing said apparent speed as a function which expresses the speed ratio of said apparent speed V to said nominal speed Vnom by a number of recorded frames to be skipped or to be repeated periodically at the time of reading; electronically selecting the images to be read in accordance with said function which contains a first term expressing a whole number M of frame jumps at each reading and a second term expressing a fractional part of said speed ratio, either added to or subtracted from the first term, said fractional part being formed by a whole number N representing the number of times a subsequent frame is to be skipped or repeated in a series of frames comprising a predetermined number K of frames. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification