Digital image adjustable compression and resolution using face detection information

• US 7,684,630 B2
• Filed: 12/09/2008
• Issued: 03/23/2010
• Est. Priority Date: 06/26/2003
• Status: Expired due to Term

• Current Assignee: FotoNation Limited (Adeia Inc.)
• Original Assignee: FotoNation Vision Limited (Adeia Inc.)
• Inventors: Steinberg, Eran
• Primary Examiner(s): Ahmed; Samir A.
• Assistant Examiner(s): Bayat; Ali
• Application Number:
  US12/331,334
• Publication Number:
  US 20090141144A1
• Time in Patent Office: 469 Days
• Field of Search: 382/103, 382/243, 382/282, 382/118, 382/254, 382/203, 382/240, 382/190, 382/235, 382/236, 382/287, 382/232, 358/1.15, 348/143, 348/222.1, 348/207.2, 348/239, 375/240.16, 375/240.12
• US Class Current: 382/243
• CPC Class Codes: G06V 40/165 using facial parts and geometric relationships
• CPC Class Codes: H04N 1/41 Bandwidth or redundancy reduction by scanning H04N1/17 ; methods or arrangements for coding, decoding, compressing or decompressing digital video signals H04N19/00
• CPC Class Codes: H04N 19/115 Selection of the code volume for a coding unit prior to coding
• CPC Class Codes: H04N 19/136 Incoming video signal characteristics or properties
• CPC Class Codes: H04N 19/154 Measured or subjectively estimated visual quality after decoding, e.g. measurement of distortion use of rate-distortion criteria H04N19/147
• CPC Class Codes: H04N 19/162 User input
• CPC Class Codes: H04N 19/17 the unit being an image region, e.g. an object
• CPC Class Codes: H04N 19/186 the unit being a colour or a chrominance component

Abstract

A method of adjustable spatial and/or temporal compression of an image including a face includes identifying a group of pixels that correspond to a face within a digitally-acquired image. A first compression portion of the image including the group of pixels is determined. A second compression portion of the image other than the group of pixels is also determined. The first compression portion may be automatically compressed with higher-grade compression than the second compression portion to generate a compressed image including the face, or an option to provided the compressed image including the different grade compressions may be provided.

Claims

1. One or more computer-readable media having code embedded therein for programming a processor to carry out a method of in-camera processing of a still image including a face as part of an acquisition process, the method comprising:

identifying a group of pixels within a face within a digitally-acquired still image on a portable camera;

generating in-camera, capturing or otherwise obtaining in-camera a collection of low resolution images including said group of pixels within said face;

tracking said group of pixels within said face within said collection of low resolution images;

gathering information regarding said group of pixels within said face from said collection of low resolution images;

automatically determining in-camera processing based on the information gathered regarding said group of pixels within said face from said collection of low resolution images;

generating a processed version of the still image including a new group of pixels within said face based on the determining; and

outputting, storing or displaying the in-camera processed version of the still image including said new group of pixels within said face, or combinations thereof.

2. The one or more computer-readable media of claim 1, wherein the method further comprises implementing said in-camera processing as adjustable image resolution.

3. The one or more computer-readable media of claim 1, wherein a quality of said in-camera processing is varied between a plurality of groups of pixels that correspond to a plurality of faces.

4. The one or more computer-readable media of claim 1, wherein said in-camera processing comprises a function of one or more parameters including relative size of the face, location of the face, exposure of the face, or total number of faces detected in the image, or combinations thereof.

5. The one or more computer-readable media of claim 1, wherein said low resolution images comprise at least one subsampled version of an acquired higher resolution image.

6. The one or more computer-readable media of claim 1, wherein said collection of low resolution images comprises one or more thumbnail views or a contact sheet or both.

7. The one or more computer-readable media of claim 1, wherein the method further comprises displaying in preview said one or more thumbnail views or said contact sheet or said collection of low resolution images including said group of pixels within said face, or combinations thereof.

8. One or more computer-readable media having code embedded therein for programming a processor to carry out a method of in-camera processing of a still image including a face as part of an acquisition process, the method comprising:

identifying a group of pixels within a face within a digitally-acquired still image on a portable camera;

generating in-camera, capturing or otherwise obtaining in-camera a collection of low resolution images including said group of pixels within said face;

tracking group of pixels within said face within said collection of low resolution images;

gathering information regarding said group of pixels within said face from said collection of low resolution images;

automatically determining in-camera processing based on the information gathered regarding said group of pixels within said face from said collection of low resolution images;

automatically providing an option for in-camera processing of the still image including the group of pixels within said face based on the determining; and

outputting one or both of the digitally-acquired still image and an in-camera processed image including a new group of pixels within said face, or displaying, printing, storing or transmitting one or both of the digitally-acquired still image and the in-camera processed image, or combinations thereof.

9. The one or more computer-readable media of claim 8, wherein said option is variable based on a subjective user decision.

10. The one or more computer-readable media of claim 9, wherein the method further comprises determining said option as a function of one or more parameters including relative size of the face, location of the face, exposure of the face, or total of faces detected in the image, or combinations thereof.

11. The one or more computer-readable media of claim 8, wherein the method further comprises implementing said in-camera processing as adjustable image resolution.

12. The one or more computer-readable media of claim 8, wherein a quality of said in-camera processing is varied between a plurality of groups of pixels that correspond to a plurality of faces.

13. The one or more computer-readable media of claim 8, wherein said low resolution images comprise at least one subsampled version of an acquired higher resolution image.

14. The one or more computer-readable media of claim 8, wherein said collection of low resolution images comprises one or more thumbnail views or a contact sheet or both.

15. The one or more computer-readable media of claim 8, wherein the method further comprises displaying in preview said one or more thumbnail views or said contact sheet or said collection of low resolution images including said group of pixels within said face, or combinations thereof.

16. A digital image acquisition device, comprising:

a lens and a sensor for acquiring a digital image,

a processor, and

a computer-readable medium have code embedded therein for programming the processor to carry out a method of in-camera processing of a still image including a face as part of an acquisition process, the method comprising;

identifying a group of pixels within a face within a digitally-acquired still image on a portable camera;

generating in-camera, capturing or otherwise obtaining in-camera a collection of low resolution images including said group of pixels within said face;

tracking said group of pixels within said face within said collection of low resolution images;

gathering information regarding said group of pixels within said face from said collection of low resolution images;

automatically determining in-camera processing based on the information gathered regarding said group of pixels within said face from said collection of low resolution images; and

generating a processed version of the still image including a new group of pixels within said face based on the determining, and one or more of outputting, displaying or storing the processed version of the still image.

17. The device of claim 16, wherein the method further comprises implementing said in-camera processing as adjustable image resolution.

18. The device of claim 16, wherein said enhanced quality processing is variable over a plurality of groups of pixels that correspond to a plurality of faces.

19. The device of claim 16, wherein said enhanced quality processing comprises a function of one or more parameters including relative size of the face, location of the face, exposure of the face, or total of faces detected in the image, or combinations thereof.

20. The device of claim 16, wherein said low resolution images comprise at least one subsampled version of an acquired higher resolution image.

21. The device of claim 16, wherein said collection of low resolution images comprises one or more thumbnail views or a contact sheet or both.

22. The device of claim 16, wherein the method further comprises displaying in preview said one or more thumbnail views or said contact sheet or said collection of low resolution images including said group of pixels within said face, or combinations thereof.

23. A digital image acquisition device, comprising:

a lens and a sensor for acquiring a digital image,

a processor, and

a computer-readable medium have code embedded therein for programming the processor to carry out a method of in-camera processing of a still image including a face as part of an acquisition process, the method comprising;

identifying a group of pixels within a face within a digitally-acquired still image on a portable camera;

generating in-camera, capturing or otherwise obtaining in-camera a collection of low resolution images including said group of pixels within said face;

tracking said group of pixels within said face within said collection of low resolution images;

gathering information regarding said group of pixels within said face from said collection of low resolution images;

automatically determining in-camera processing based on the information gathered regarding said group of pixels within said face from said collection of low resolution images;

automatically providing an option for in-camera processing of the still image including the group of pixels within said face based on the determining; and

outputting one or both of the digitally-acquired still image and an in-camera processed image including a new group of pixels within said face, or displaying, printing, storing or transmitting one or both of the digitally-acquired still image and the in-camera processed image, or combinations thereof.

24. The device of claim 23, wherein said option is variable based on a subjective user decision.

25. The device of claim 23, wherein the method further comprises determining said option as a function of one or more parameters including the relative size of the face, location of the face, exposure of the face, or total of faces detected in the image, or combinations thereof.

26. The device of claim 23, wherein the method further comprises implementing said in-camera processing as adjustable image resolution.

27. The device of claim 23, wherein said enhanced quality processing is variable over a plurality of groups of pixels that correspond to a plurality of faces.

28. The device of claim 23, wherein said low resolution images comprise at least one subsampled version of an acquired higher resolution image.

29. The device of claim 23, wherein said collection of low resolution images comprises one or more thumbnail views or a contact sheet or both.

30. The device of claim 23, wherein the method further comprises displaying in preview said one or more thumbnail views or said contact sheet or said collection of low resolution images including the group of pixels within said face, or combinations thereof.