Method, apparatus, and recording medium for processing image

Patent metadata

Field	Value
Publication number	US-2018103219-A1
Application number	US-201715782159-A
Country	US
Kind code	A1
Filing date	Oct 12, 2017
Priority date	Oct 12, 2016
Publication date	Apr 12, 2018
Grant date	—

Abstract

A method, performed by a device, of processing an image, may include obtaining a circular image generated by photographing a target space through a fisheye lens; generating metadata including lens shading compensation information for correcting color information of the obtained circular image; and transmitting the obtained circular image and the metadata to a terminal.

First claim

What is claimed is:

1 . A method, performed by a terminal, of processing an image, the method comprising:
receiving metadata comprising (i) a plurality of circular images generated by photographing a target space through at least one fisheye lens, and (ii) lens shading compensation information associated with the plurality of circular images; generating a plurality of corrected circular images by correcting color information of each of the plurality of circular images based on the lens shading compensation information obtained from the metadata; rendering the plurality of corrected circular images to generate a virtual reality (VR) image for the target space; and outputting the generated VR image.

2 . The method of claim 1 , wherein the correcting the color information comprises:
determining lens shading compensation values for a plurality of regions in the circular image based on the lens shading compensation information that includes a parameter indicating correspondence between the plurality of regions, identified by a distance of the each of the plurality of regions from a center of the circular image, and the lens shading compensation values for the plurality of regions; and correcting the color information of the each of the plurality of regions based on the determined lens shading compensation values for the plurality of regions.

3 . The method of claim 1 , wherein the correcting the color information comprises:
determining lens shading compensation values for a plurality of regions in the circular image based on the lens shading compensation information that includes a parameter indicating correspondence between the plurality of regions, identified according to a field of view of the circular image, and the lens shading compensation values for the plurality of regions; and correcting the color information of the each of the plurality of regions based on the determined lens shading compensation values for the plurality of regions.

4 . The method of claim 1 , wherein the correcting the color information comprises:
determining lens shading compensation values for a plurality of regions in the circular image based on the lens shading compensation information that includes a parameter indicating correspondence between the plurality of regions and the lens shading compensation values for each color of the plurality of regions; and correcting the color information of the each of the plurality of regions based on the determined lens shading compensation values for the plurality of regions.

5 . A device for processing an image, the device comprising:
a photographing unit configured to obtain a circular image generated by photographing a target space through a fisheye lens; a processor configured to generate metadata including lens shading compensation information for correcting color information of the obtained circular image; and a communicator configured to transmit the obtained circular image and the metadata to a terminal.

6 . The device of claim 5 , wherein the lens shading compensation information comprises a parameter indicating correspondence between a plurality of regions in the circular image, each of the plurality of regions being identified by a distance from a center of the circular image, and lens shading compensation values for the plurality of regions.

7 . The device of claim 5 , wherein the lens shading compensation information comprises a parameter indicating correspondence between a plurality of regions in the circular image, each of the plurality of regions being identified according to a field of view of the circular image and lens shading compensation values for the plurality of regions.

8 . The device of claim 5 , wherein the lens shading compensation information comprises information about correspondence between a plurality of regions in the circular image and lens shading compensation values for each color of the plurality of regions.

9 . A terminal for processing an image, the terminal comprising:
a communicator configured to receive metadata comprising (i) a plurality of circular images generated by photographing a target space through at least one fisheye lens, and (ii) lens shading compensation information associated with the plurality of circular images; a processor configured to generate a plurality of corrected circular images by correcting color information of each of the plurality of circular images based on the lens shading compensation information obtained from the metadata, and render the plurality of corrected circular images to generate a virtual reality (VR) image for the target space; and an outputter configured to output the generated VR image.

10 . The terminal of claim 9 , wherein the processor is further configured to:
determine lens shading compensation values for a plurality of regions in the circular image based on the lens shading compensation information that includes a parameter indicating correspondence between the plurality of regions, identified by a distance of the each of the plurality of regions from a center of the circular image, and the lens shading compensation values for the plurality of regions; and correct the color information of the each of the plurality of regions based on the determined lens shading compensation values for the plurality of regions.

11 . The terminal of claim 9 , wherein the processor is further configured to:
determine lens shading compensation values for a plurality of regions in the circular image based on the lens shading compensation information that includes a parameter indicating correspondence between the plurality of regions, identified according to a field of view of the circular image, and the lens shading compensation values for the plurality of regions; and correct the color information of the each of the plurality of regions based on the determined lens shading compensation values for the plurality of regions.

12 . The terminal of claim 9 , wherein the processor is further configured to:
determine lens shading compensation values for a plurality of regions in the circular image based on the lens shading compensation information that includes a parameter indicating correspondence between the plurality of regions and the lens shading compensation values for each color of the plurality of regions; and correct the color information of the each of the plurality of regions based on the determined lens shading compensation values for the plurality of regions.

13 . A non-transitory computer-readable recording medium having recorded thereon instructions for executing the method of claim 1 on a computer.

Assignees

• Samsung Electronics Co Ltd

Inventors

• Jeong Jae-Yun
• Choi Byeong-Doo
• Lee Jae-Kyeong
• Yip Eric
• Kang Jae-Eun

Classifications

• G02B13/06

  Panoramic objectives; So-called "sky lenses" {including panoramic objectives having reflecting surfaces} · CPC title

• H04N25/61 Primary

  the noise originating only from the lens unit, e.g. flare, shading, vignetting or "cos4" · CPC title

• H04N23/698

  for achieving an enlarged field of view, e.g. panoramic image capture · CPC title

• H04N19/46 Primary

  Embedding additional information in the video signal during the compression process (H04N19/517, H04N19/68, H04N19/70 take precedence) · CPC title

• H04N23/81

  for suppressing or minimising disturbance in the image signal generation · CPC title