Special effect device, image processing method, and shadow generating method
First Claim
1. A special video effect apparatus which performs a special video transformation for a source video signal, said apparatus comprising:
- video processing means for performing a spatial video transformation on said source video signal to produce a transformed video signal based on 3-D video transform parameters; and
shadow producing means for performing a shadow transformation on said source video signal to produce a transformed shadow signal based on shadow transform parameters, said shadow transform parameters are associated with said 3-D video transform parameters so that said shadow transformation corresponds to said video spatial transformation, whereinan algorithm of said spatial video transformation comprises 3-D video transformation algorithm for performing 3-D video transformation on said source video signal to produce a virtual 3-D video signal and a first perspective transformation algorithm for performing a first perspective transformation on said virtual 3-D video signal to produce said transformed video signal; and
wherein,an algorithm of said shadow transformation comprises said 3-D video transformation algorithm, a second perspective transformation algorithm for performing a second perspective transformation on said virtual 3-D video signal to produce a virtual 3-D shadow signal, and said first perspective transformation algorithm for generating said transformed shadow signal.
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Abstract
A virtual 3-D object video signal V1 is produced by performing a 3-D image transformation for a source video signal, and a 2-D objet video signal V2 for virtually representing the 3-D image transformation is produced by projecting the object video signal V1 onto an X-Y plane. Further, 3-D shadow signals V3 and V5 are produced by projecting the 3-D image transformed 3-D object video signal V1 onto a shadow plane, and 2-D shadow signals V4 and V6 corresponding to said 2-D object video signal are produced by projecting the 3-D shadow signals onto the X-Y plane. Therefore, a shadow signal for a 3-D image transformed object video signal can be produced by calculations.
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Citations
5 Claims
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1. A special video effect apparatus which performs a special video transformation for a source video signal, said apparatus comprising:
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video processing means for performing a spatial video transformation on said source video signal to produce a transformed video signal based on 3-D video transform parameters; and shadow producing means for performing a shadow transformation on said source video signal to produce a transformed shadow signal based on shadow transform parameters, said shadow transform parameters are associated with said 3-D video transform parameters so that said shadow transformation corresponds to said video spatial transformation, wherein an algorithm of said spatial video transformation comprises 3-D video transformation algorithm for performing 3-D video transformation on said source video signal to produce a virtual 3-D video signal and a first perspective transformation algorithm for performing a first perspective transformation on said virtual 3-D video signal to produce said transformed video signal; and
wherein,an algorithm of said shadow transformation comprises said 3-D video transformation algorithm, a second perspective transformation algorithm for performing a second perspective transformation on said virtual 3-D video signal to produce a virtual 3-D shadow signal, and said first perspective transformation algorithm for generating said transformed shadow signal. - View Dependent Claims (2, 3, 4)
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5. A method of performing a special video transformation for a source video signal, the method comprising the steps of:
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performing a spatial video transformation on said source video signal to produce a transformed video signal based on 3-D video transform parameters; and performing a shadow transformation on the source video signal to produce a transformed shadow signal based on shadow transform parameters, the shadow transform parameters are associated with the 3-D video transform parameters so that the shadow transformation corresponds to the video spatial transformation, wherein an algorithm of said spatial video transformation comprises 3-D video transformation algorithm for performing 3-D video transformation on said source video signal to produce a virtual 3-D video signal and a first perspective transformation algorithm for performing a first perspective transformation on said virtual 3-D video signal to produce said transformed video signal; and
wherein,an algorithm of said shadow transformation comprises said 3-D video transformation algorithm, a second perspective transformation algorithm for performing a second perspective transformation on said virtual 3-D video signal to produce a virtual 3-D shadow signal, and said first perspective transformation algorithm for generating said transformed shadow signal.
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Specification