Apparatus for analyzing depth of holographic image and analyzing method thereof
An apparatus which analyses a depth of a holographic image is provided. The apparatus includes an acquisition unit that acquires a hologram, a restoration unit that restores a three-dimensional holographic image by irradiating the hologram with a light source, an image sensing unit that senses a depth information image of the restored holographic image, and an analysis display unit that analyzes a depth quality of the holographic image, based on the sensed depth information image, and the image sensing unit uses a lensless type of photosensor.
1. An apparatus which analyses a depth of a holographic image, the apparatus comprising:
an acquisition device configured to acquire a hologram;
a restoration device configured to restore a three-dimensional holographic image by irradiating the hologram with a light source;
an image sensor configured to sense a depth information image of the restored holographic image; and
a processor configured to execute instructions; and
a memory storing the instructions, wherein execution of the instructions configures the processor to:
analyze a depth quality of the holographic image, based on the sensed depth information image,
wherein the image sensor senses the depth information image through a lensless type of photosensor,
wherein the image sensor comprises:
a plurality of transparent plane photosensors configured to measure the holographic image restored by the restoration device; and
at least one electric rail configured to move the plurality of transparent plane photosensors in a depth direction of the holographic image,
wherein the plurality of transparent plane photo sensors comprises:
a first transparent plane photosensor configured to move in a depth direction of a first region of a holographic space in which the restored holographic image is displayed; and
a second transparent plane photosensor configured to move in a depth direction of a second region of the holographic space.
2. The apparatus of claim 1 , wherein the depth direction of the holographic image corresponds to a direction of a spatial light modulator of the restoration device from the photosensor panel.
3. The apparatus of claim 1 , wherein the first region and the second region do not overlap each other.
4. The apparatus of claim 1 , further comprising:
an image transmitter configured to sequentially transmit the depth information image sensed by the image sensor in real time; and
an image generator configured to three-dimensionally restore the transmitted depth information image in a depth axis direction.
5. The apparatus of claim 1 , wherein the processor is further configured to:
compare the depth information image with depth information of an original image associated with an object; and
analyze a depth reproduction quality based on the comparison result.
6. The apparatus of claim 1 , wherein the restoration device includes:
a laser device configured to generate a laser and provide the generated laser as the light source;
a collimator configured to output the generated laser as an enlarged plane wave;
a spatial light modulator configured to reflect light modulated from the plane wave into a space when the enlarged plane wave is incident; and
a beam splitter configured to change a direction of at least a portion of the light reflected from the spatial light modulator and propagate the changed light.