Image composition evaluation

• US 7,035,477 B2
• Filed: 12/20/2001
• Issued: 04/25/2006
• Est. Priority Date: 12/22/2000
• Status: Active Grant

• Current Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Original Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Inventors: Cheatle, Stephen Philip
• Primary Examiner(s): Wu, Jingge
• Assistant Examiner(s): KUHN, JORDAN M
• Application Number:
  US10/169,835
• Publication Number:
  US 20020191860A1
• Time in Patent Office: 1,587 Days
• Field of Search: 382/282
• US Class Current: 382/282
• CPC Class Codes: G06T 2207/20104 Interactive definition of region of interest [ROI]
• CPC Class Codes: G06T 3/403 Edge-driven scaling; Edge-based scaling
• CPC Class Codes: G06T 3/4038 Image mosaicing, e.g. composing plane images from plane sub-images
• CPC Class Codes: G06T 7/00 Image analysis
• CPC Class Codes: G06T 7/44 using image operators, e.g. filters, edge density metrics or local histograms
• CPC Class Codes: H04N 1/3872 Repositioning or masking

Abstract

A method of providing composition evaluation of an image includes analyzing a composed image in accordance with one or more predefined composition rules and providing a report or warning signal if one or more of those compositional rules have been contravened. The analysis includes identifying regions of compositional significance within the image and applying the compositional rules to those regions. The compositional rules may include well known photographic composition rules such as the “rule of thirds”, ensuring that there are no large expanses of foreground or background with little or no regions of significance within them, and ensuring that the edge of the composed image does not bisect any regions of significance.

Claims

1. A method of providing composition evaluation of an image, the method comprising:

acquiring an image;

analysing the composition of said image in accordance with a predefined set of compositional rules; and

providing a report concerning the composition of the image,

wherein said analysis comprises identifying one or more regions of compositional significance within said image and applying said set of compositional rules to said one or more identified regions, and

wherein said report is displayed on a display device and wherein said report indicates one of said identified regions of compositional significance that contravene at least one of said compositional rules.

2. A method of providing composition evaluation according to claim 1, wherein said analysis is performed in response to a composition evaluation request signal.

3. A method of providing composition evaluation according to claim 1, wherein said report is presented visually.

4. A method of providing a composition evaluation according to claim 3, wherein said report is a visual warning signal displayed on an image viewer.

5. A method as claimed in claim 1, wherein a plurality of possible recompositions of the image are displayed to a user.

6. A method of providing composition evaluation according to claim 1, wherein said report is an audio signal.

7. A method of providing composition evaluation according to claim 1, wherein said composition rules are heuristic rules.

8. A method of providing composition evaluation of an image as claimed in claim 1, wherein the step of analysing the image comprises:

a) processing the image to identify at least one feature relevant to the composition of the image;

b) selecting at least one compositional rule based on the relevance of the compositional rule to one or more of the identified features; and

c) determining whether the image is appropriately composed.

9. A method of providing composition evaluation of an image as claimed in claim 8 where the report concerning the composition of the image is presented visually.

10. A method of providing composition evaluation of an image as claimed in claim 9 wherein the report concerning the composition of the image is presented as textural comments.

11. A method of providing composition evaluation of an image as claimed in claim 8, wherein the relevant features are identified on the basis of unusualness of one of the colour and brightness in the image.

12. A method of providing composition evaluation of an image, the method comprising:

i. Acquiring an image;

ii. Processing the image to identify at least one feature relevant to the composition of image;

iii. Selecting at least two compositional rules from a plurality of compositional rules based on the relevance of the at least two compositional rules to one or more of the identified features;

iv. Determining whether the image is appropriately composed; and

v. Providing an output concerning the composition of the image,

wherein the Determining comprises identifying one or more regions of compositional significance within the image and applying the at least two compositional rules to the one or more identified regions, and

wherein the Providing comprises displaying the output on a display device and wherein the output indicates one of said identified regions of compositional significance that contravene at least one of the at least two compositional rules.

13. A method as claimed in claim 12, wherein at least one suggested crop of the image is calculated and presented on an output device.

14. A method as claimed in claim 12, wherein at least one suggested crop of the image is displayed to a user.

15. An image composition evaluation apparatus comprising:

an image receiving element arranged to convert an image into an electrical signal; and

an image processor arranged to receive said electrical image signal, analyse the composition of said image in accordance with a predefined set of composition rules and provide a report concerning the composition of the image,

wherein said image processor analyses the composition of said image by identifying one or more regions of compositional significance within said image and applying said set of compositional rules to said one or more identified regions, and

wherein said report is displayed on a display device and wherein said report indicates one of said identified regions of compositional significance that contravene at least one of said compositional rules.

16. An image composition evaluation apparatus according to claim 15, wherein said image processor is arranged to perform said analysis in response to receiving a composition evaluation request signal.

17. An image composition evaluation apparatus according to claim 16, wherein said composition evaluation request signal is generated in response to the actuation of a composition evaluation request switch.

18. An image composition evaluation apparatus according to claim 17, wherein said composition evaluation request switch comprises an image capture switch arranged to activate an image capture system to capture said analysed image.

19. An image composition evaluation apparatus according to claim 15, wherein said report is presented visually.

20. An image composition evaluation apparatus according to claim 19, wherein said report is a visual warning signal displayed on a view finder.

21. An image composition evaluation apparatus according to claim 15, wherein said report comprises an audio signal.

22. An apparatus as claimed in claim 15, in which the image processor causes suggested recompositions of the image to be presented to the user.

23. A motion picture camera including an image composition evaluation apparatus according to claim 15.

24. A still picture camera including an image composition evaluation apparatus according to claim 15.

25. An apparatus as claimed in claim 15, wherein the step of analysing the image comprises:

a) processing the image to identify at least one feature relevant to the composition of the image;

b) selecting at least one compositional rule based on the relevance of the compositional rule to one or more of the identified features; and

c) determining whether the image is appropriately composed.

26. An apparatus as claimed in claim 25 where report concerning the composition of the image is presented visually.

27. An apparatus as claimed in claim 26, wherein the report concerning the composition of the image is presented as textural comments.

28. An apparatus for providing composition evaluation of an image as claimed in claim 25, wherein the relevant features are identified on the basis of unusualness of one of the colour and brightness in the image.

29. An apparatus for providing composition evaluation of an image, comprising a photo detector for acquiring an image;

and a processor for;

i. processing the image to identify at least one feature relevant to the composition of image;

ii. selecting at least one composition rule from a plurality of compositional rules based on the relevance of the compositional rule to one or more of the identified features;

iii. determining whether the image is appropriately composed; and

iv. providing an output concerning the composition of the image,

wherein the determining comprises identifying one or more regions of compositional significance within the image and applying the plurality of compositional rules to the one or more identified regions, and

wherein the providing comprises displaying the output on a display device and wherein the output indicates one of said identified regions of compositional significance that contravene at least one of the plurality of compositional rules.

30. An apparatus as claimed in claim 29, wherein at least one suggested crop of the image is calculated and presented on an output device.

31. An apparatus as claimed in claim 29, wherein at least one suggested crop of the image is displayed to a user.