DIGITAL PHOTOGRAPHING APPARATUS FOR CORRECTING IMAGE DISTORTION AND IMAGE DISTORTION CORRECTING METHOD THEREOF

• US 20110187903A1
• Filed: 09/13/2010
• Published: 08/04/2011
• Est. Priority Date: 02/02/2010
• Status: Abandoned Application

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Kim, Jae-ho, Choi, Kyu-yul
• Application Number:
  US12/880,330
• Publication Number:
  US 20110187903A1
• Time in Patent Office: Days
• US Class Current: 348/241
• CPC Class Codes: G06T 5/006 Geometric correction correction of chromatic aberrations adapted to be used in an image pickup device containing an electronic image sensor H04N23/10; detecting, correcting, reducing or removing artefacts resulting only from the lens unit, e.g. flare, shading, vignetting or "cos4" H04N25/61
• CPC Class Codes: G06T 5/80 Geometric correction
• CPC Class Codes: H04N 23/81 for suppressing or minimising disturbance in the image signal generation
• CPC Class Codes: H04N 5/2628 Alteration of picture size, shape, position or orientation, e.g. zooming, rotation, rolling, perspective, translation

Abstract

A digital photographing apparatus for correcting image distortion performs an image distortion correcting method. The image distortion correcting method includes receiving an image signal through a lens, extracting image data having distortion in a block form from the received image signal, correcting the distortion by dividing the extracted image data, and generating and displaying an output image by combining the corrected image data.

Claims

1. A method of correcting image distortion in a digital photographing apparatus, the method comprising:

receiving an image signal through a lens;

extracting image data having distortion in a block form from the received image signal;

correcting the distortion by dividing the extracted image data; and

generating and displaying an output image by combining the corrected image data.

2. The method of claim 1, wherein the image data has a block form comprising a tile size X in a row direction and a line buffer size Y in a column direction.

3. The method of claim 2, wherein the image data determines starting address coordinate values of a portion having the distortion, the portion having the distortion determined as a block comprising the tile size X in the row direction and the line buffer size Y in the column direction through the starting address coordinate values.

4. The method of claim 2, wherein, when the tile size X of the image data is 64 pixels, the line buffer size Y is 12 lines.

5. The method of claim 2, wherein, when the tile size X of the image data is 128 pixels, the line buffer size Y is 21 lines.

6. The method of claim 2, wherein, when the tile size X of the image data is 256 pixels, the line buffer size Y is 38 lines.

7. The method of claim 2, wherein, when the tile size X of the image data is 512 pixels, the line buffer size Y is 70 lines.

8. The method of claim 1, further comprising:

storing the image signal from the lens in a first memory; and

extracting the image data in a block form and temporarily storing the extracted image data in a second memory.

9. The method of claim 8, further comprising correcting distortion by dividing the image data stored in the second memory into more than one sub block.

10. A method of correcting image distortion in a digital photographing apparatus, the method comprising:

receiving an image signal through a lens;

extracting first image data of a portion having distortion in a block form from the image signal and loading the extracted first image data into a temporary memory;

extracting second image data adjacent to the first image data in a block form and loading the extracted second image data into a temporary memory while the distortion of the first image data is corrected by dividing the loaded first image data;

correcting distortion of the second image data by dividing the second image data; and

generating and displaying an output image by combining the corrected image data.

11. The method of claim 10, wherein the image data has a block form comprising a tile size X in a row direction and a line buffer size Y in a column direction.

12. The method of claim 10, further comprising correcting the distortion by dividing the loaded image data into more than one sub block.

13. The method of claim 10, further comprising storing the image signal from the lens in a memory.

14. A digital photographing apparatus comprising:

a lens that receives an image signal;

an image signal processor that extracts image data of a portion having distortion in a block form from the image signal, loads the extracted image data in a temporary memory, corrects the distortion by dividing the loaded image data, and generates an output image by combining the corrected image data; and

a display unit that displays the output image.

15. The device of claim 14, wherein the image signal processor comprises:

an image data extracting unit that extracts image data of a portion having distortion in a block form and loads the extracted image data into a temporary memory;

a distortion correcting unit that corrects the distortion by dividing the loaded image data; and

an output image generating unit that generates an output image by combining the corrected image data.

16. The device of claim 14, wherein the image data has a block form comprising a tile size X in a row direction and a line buffer size Y in a column direction.