Irregular-region based automatic image correction

Patent metadata

Field	Value
Publication number	US-2017257557-A1
Application number	US-201615059097-A
Country	US
Kind code	A1
Filing date	Mar 2, 2016
Priority date	Mar 2, 2016
Publication date	Sep 7, 2017
Grant date	—

Abstract

Methods and apparatuses for irregular-region based automatic image correction are disclosed. In one aspect, the method is operable by an imaging device including a touch sensor, for performing image correction. The method can include obtaining a first image of a scene and receiving, via the touch sensor, a touch input indicating a selected region of the first image and having a shape that corresponds to a shape of the selected region. The method can also include determining statistics indicating visual properties for the selected region, adjusting at least one image correction parameter of the imaging device based on the determined statistics and the shape of the touch input, and obtaining a second image of the scene based on the adjusted at least one image correction parameter of the imaging device.

First claim

1 . A method, operable by an imaging device including a touch sensor, for performing image correction, the method comprising:
obtaining a first image of a scene; receiving, via the touch sensor, a user-drawn input indicating a selected region of the first image and having a shape that corresponds to a shape of the selected region; determining statistics indicating visual properties for the selected region; adjusting at least one image correction parameter of the imaging device based on the determined statistics and the shape of the user-drawn input; and obtaining a second image of the scene based on the adjusted at least one image correction parameter of the imaging device.

2 . The method of claim 1 , wherein the at least one image correction parameter of the imaging device comprises one or more of: a position of a lens, a size of an aperture, a shutter speed, and a white balance compensation parameter.

3 . The method of claim 1 , wherein the shape of the user-drawn input is one of an open curve and a closed loop, the method further comprising defining the selected region as an area of the first image corresponding to the user-drawn input based on the shape of the user-drawn input.

4 . The method of claim 1 , further comprising:
partitioning the first image into a grid of blocks; determining the statistics for each block of the grid; and weighting the statistics for blocks of the grid corresponding to the selected region higher than blocks of the grid that do not correspond to the selected region.

5 . The method of claim 4 , further comprising:
determining that the shape of the user-drawn input comprises an open curve; and weighting the statistics for blocks of the grid that overlap the open curve higher than blocks of the grid that do not overlap the selected region.

6 . The method of claim 4 , further comprising:
determining that the shape of the user-drawn input comprises a closed loop; and weighting the statistics for blocks of the grid that are enclosed by the closed loop higher than blocks of the grid that are not enclosed by the selected region.

7 . The method of claim 1 , wherein the at least one image correction parameter of the imaging device comprises a position of a lens, the method further comprising:
determining a plurality of positions of the lens respectively corresponding to different focal depths of the selected region; and receiving a third image at each of the determined positions of the lens.

8 . The method of claim 1 , wherein the at least one image correction parameter of the imaging device comprises a position of a lens, the method further comprising:
detecting at least one object within the selected region; determining the position of the lens corresponding to a focal depth of the object; and adjusting the position of the lens based on the determined position of the lens.

9 . An imaging device, comprising:
an image sensor; a display; a touch sensor; at least one processor; and a memory storing computer-executable instructions for controlling the at least one processor to:
obtain a first image of a scene from the image sensor;
control the display to display the first image;
receive, from the touch sensor, a user-drawn input indicating a selected region of the first image and having a shape that corresponds to a shape of the selected region;
determine statistics indicating visual properties for the selected region;
adjust at least one image correction parameter of the imaging device based on the determined statistics and the shape of the user-drawn input; and
obtain a second image of the scene based on the adjusted at least one image correction parameter of the imaging device.

10 . The imaging device of claim 9 , wherein the at least one image correction parameter of the imaging device comprises one or more of: a position of a lens, a size of an aperture, a shutter speed, and a white balance compensation parameter.

11 . The imaging device of claim 9 , wherein the shape of the user-drawn input is one of an open curve and a closed loop, the computer-executable instructions further for controlling the at least one processor to define the selected region as an area of the first image corresponding to the user-drawn input based on the shape of the user-drawn input.

12 . The imaging device of claim 9 , wherein the computer-executable instructions are further for controlling the at least one processor to:
partition the first image into a grid of blocks; determine the statistics for each block of the grid; and weight the statistics for blocks of the grid corresponding to the selected region higher than blocks of the grid that do not correspond to the selected region.

13 . The imaging device of claim 12 , wherein the computer-executable instructions are further for controlling the at least one processor to:
determine that the shape of the user-drawn input comprises an open curve; and weigh the statistics for blocks of the grid that overlap the open curve higher than blocks of the grid that do not overlap the selected region.

14 . The imaging device of claim 12 , wherein the computer-executable instructions are further for controlling the at least one processor to:
determine that the shape of the user-drawn input comprises a closed loop; and weight the statistics for blocks of the grid that are enclosed by the closed loop higher than blocks of the grid that are not enclosed by the selected region.

15 . The imaging device of claim 9 , wherein the at least one image correction parameter of the imaging device comprises a position of a lens, the computer-executable instructions being further for controlling the at least one processor to:
determine a plurality of positions of the lens respectively corresponding to different focal depths of the selected region; and receive a third image at each of the determined positions of the lens.

16 . The imaging device of claim 9 , wherein the at least one image correction parameter of the imaging device comprises a position of a lens, the computer-executable instructions being further for controlling the at least one processor to:
detect at least one object within the selected region; determine the position of the lens corresponding to a focal depth of the object; and adjust the position of the lens based on the determined position of the lens.

17 . An apparatus, comprising:
means for obtaining a first image of a scene; means for receiving a user-drawn input indicating a selected region of the first image and having a shape that corresponds to a shape of the selected region; means for determining statistics indicating visual properties for the selected region; means for adjusting at least one image correction parameter of an imaging device based on the determined statistics and the shape of the user-drawn input; and means for obtaining a second image of the scene based on the adjusted at least one image correction parameter of the imaging device.

18 . The apparatus of claim 17 , wherein the at least one image correction parameter of the imaging device comprises one or more of: a position of a lens, a size of an aperture, a shutter speed, and a white balance compensation parameter.

19 . The apparatus of claim 17 , wherein the shape of the user-drawn input is one of an open curve and a closed loop, the apparatus further comprising means for defining the selected region as an area of the first image corresponding to the user-drawn input based on the shape of the user-drawn input.

Assignees

• Qualcomm Inc

Inventors

• Trusten Matthew
• Ravirala Narayana Karthik Sadanandam
• Golikeri Adarsh Abhay

Classifications

• H04N23/64

  Computer-aided capture of images, e.g. transfer from script file into camera, check of taken image quality, advice or proposal for image composition or decision on when to take image · CPC title

• H04N23/635

  Region indicators; Field of view indicators · CPC title

• H04N23/675

  comprising setting of focusing regions · CPC title

• H04N23/61

  based on recognised objects · CPC title

• H04N23/62 Primary

  Control of parameters via user interfaces · CPC title