Method and apparatus for generating binary hologram
AssigneeElectronics and Telecommunications Research Institute
InventorEun Young Chang
Life of this patent
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Abstract
Provided is a method and apparatus for generating a binary hologram. More particularly, provided is a method and apparatus that may decrease or, alternatively, minimize quality degradation of a binary hologram by employing a silhouette mask of a target object to reduce or, alternatively, minimize background noise occurring around the target object to be reproduced when generating the binary hologram.
Claims14
A method of generating a binary hologram, the method comprising:
- receiving data information used to construct a target object in a three-dimensional (3D) shape to be reproduced as a hologram;
- generating a silhouette mask of the target object based on the data information;
- generating a hologram having a complex value or a real number value in association with the target object based on the data information;
- and
- binarizing the hologram by:
- performing a first quantization process of allocating 0 or 1 to each pixel that constitutes a plane of the hologram;
- applying the silhouette mask to the hologram quantized to 0 or 1;
- and
- performing a second quantization process based on a distance between the silhouette mask applied to the quantized hologram and each pixel of the plane that is outside the silhouette mask, and
- displaying the hologram on a spatial light modulator (SLM).
A method of generating a binary hologram, the method comprising:
- receiving data information used to construct a target object in a three-dimensional (3D) shape to be reproduced as a hologram;
- generating a silhouette mask of the target object based on the data information;
- generating a hologram having a complex value or a real number value in association with the target object based on the data information;
- applying the silhouette mask of the target object to the hologram having the complex value or the real number value;
- determining a distance between the silhouette mask applied to the hologram and each pixel that constitutes a plane of the hologram;
- setting a different threshold to each pixel of the plane outside of the silhouette mask by applying the determined distance to a threshold set to the hologram;
- binarizing all pixels in the hologram by using the different threshold;
- and
- displaying the hologram on a spatial light modulator (SLM).
An apparatus for generating a binary hologram, the apparatus comprising:
- an information receiver configured to receive data information used to construct a target object in a three-dimensional (3D) shape to be reproduced as a hologram;
- a silhouette mask generator configured to generate a silhouette mask of the target object based on the data information;
- a hologram generator configured to generate a hologram having a complex value or a real number value in association with the target object based on the data information;
- and
- a binarizer configured to binarize the hologram,
- wherein the binarizer comprises:
- a first quantizer configured to perform a first quantization process of allocating 0 or 1 to each of pixels that constitute a plane of the hologram;
- a silhouette mask applier configured to apply the silhouette mask to the hologram quantized to 0 or 1;
- and
- a second quantizer configured to perform a second quantization process based on a distance between the silhouette mask applied to the quantized hologram and each pixel outside the silhouette mask.
Dependencies are inferred from the claim text.