Light transmission composition analysis method based on sparse representation
A component analysis and sparse representation technology, applied in the field of computational photography, can solve the problem of not considering the removal of camera temporal blur, and achieve the effect of improving accuracy
Active Publication Date: 2013-08-14
TSINGHUA UNIV
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However, the model proposed in this article does not consider removing the time domain blurring effect of the camera, and only finds the pulse start and end points through gradient domain changes to perform interpolation to obtain the decomposition result
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[0017] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.
[0018] The present invention proposes a light transmission component analysis method based on sparse representation, which includes the following steps:
[0019] S1: Extract the prior knowledge of the basic compositional modes of optical transmission;
[0020] S2: Based on the light time-of-flight acquisition capability of the light-speed camera, construct a base representing the light transmission function;
[0021] S3: Considering the time-space domain acquisition accuracy of the light-speed camera, an imaging model equation with spar...
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The invention provides a light transmission composition analysis method based on a sparse representation, which comprises the following steps: first, extracting the priori knowledge of the light transmission basic constitution mode, then constructing a base representing light transmission function based on light ray aviation time collection capability of a light velocity camera, and at last, creating image formation model equation with sparsity constraint to solve the basic constitution mode of the light transmission in the condition of considering light velocity camera time-space domain acquisition accuracy, thereby being used for scene analysis and comprehension. The image formation model of the light transmission composition analysis method based on the sparse representation, provided by the invention, has the advantages that the time domain vague function of the camera is removed; the basic constitution mode of light transmission is gained; and the detection accuracy of the depth edge and the shadow edge is improved.
Description
technical field [0001] The invention relates to the technical field of computational photography, in particular to a method for analyzing light transmission components based on sparse representation. Background technique [0002] The MIT Media Lab invented a camera that captures trillions of frames per second, called a light-speed camera because light travels only 0.3 millimeters per frame. distance. The light-speed camera has three main components, one is a femtosecond laser source, which generates stable femtosecond-length laser pulses, and the other is a streak camera, which can record very weak light signals with picosecond temporal resolution, but the streak The camera can only collect 1-dimensional spatial information, because the other dimension is time information, and the third is the rotating mirror optical system, which is synchronized with the femtosecond laser light source and the streak camera, and has the ability to use rotating mirrors to separate different ...
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IPC IPC(8): G01J3/28G06F17/50
Inventor 戴琼海任治全武迪
Owner TSINGHUA UNIV