Method and apparatus for protecting contents of pornography on internet

• US 20030121035A1
• Filed: 11/22/2002
• Published: 06/26/2003
• Est. Priority Date: 05/22/2000
• Status: Active Grant

• Current Assignee: Interjungbo Company Limited
• Original Assignee: Interjungbo Company Limited
• Inventors: Ro, Yong Man
• Granted Patent: US 7,231,392 B2
• Time in Patent Office: Days
• US Class Current: 725/28
• CPC Class Codes: G06F 16/583 using metadata automatically derived from the content
• CPC Class Codes: G06F 16/9535 Search customisation based on user profiles and personalisation

Abstract

Provided is an improved pornography blocking technique which blocks pornography on the basis of the contents of multimedia data. First, feature descriptor is extracted from multimedia data inputted from the Internet by using MPEG-7 scheme. And referring to reference pornography database which stores reference pornography in the form of feature descriptor, the similarity degree between the extracted feature descriptor and the feature descriptor of the reference pornography is measured by calculating the vector distance between the two feature descriptors. And it is determined whether the inputted multimedia data is pornography or not, by comparing the measured similarity degree with the similarity measurement threshold value. According to the invention, accurate pornography determining is possible, because the invention uses the contents of the multimedia data for determining. And rapid and efficient pornography determining is possible, because the invention uses feature descriptor with less information, instead of the original multimedia data.

Claims

1. A method of filtering pornography on the basis of the contents of multimedia data, comprising the steps of:

inputting an multimedia data and extracting a feature descriptor of vector type from the inputted multimedia data, the feature descriptor describing contents of the inputted multimedia data;

measuring similarity of the extracted feature descriptor and that of reference pornography contents; and

determining whether it is a pornography or not by comparing the measured similarity and similarity measurement threshold value.

2. The method of filtering pornography according to claim 1, wherein the reference pornography is databased in a form of the feature descriptor and the step of measuring similarity is accomplished referring to the database.

3. The method of filtering pornography according to claim 1, wherein the step of measuring similarity is accomplished by calculating vector distance between the extracted feature descriptor and that of the reference pornography contents.

4. The method of filtering pornography according to claim 1, wherein the reference pornography contents are classified into 2 or more grades and pornography grade of inputted multimedia data is determined by accomplishing determination on each grade.

5. The method of filtering pornography according to claim 4, wherein the similarity measurement threshold value is different according to the grade.

6. The method of filtering pornography according to claim 1, wherein a step further comprises for inputting the similarity measurement threshold value.

7. The method of filtering pornography according to claim 1, wherein the feature descriptor is extracted on image data of the multimedia data on the basis of MPEG-7.

8. The method of filtering pornography according to claim 7, wherein the feature descriptor is a texture descriptor on the basis of MPEG-7.

9. The method of filtering pornography according to claim 1, wherein if it is determined to be pornography contents by the pornography determining step, a step further comprises for indicating the result on the display.

10. The method of filtering pornography according to claim 1, wherein if it is determined to be pornography by the pornography determining step, a step further comprises for blocking the inputted multimedia data.

11. A method of filtering pornography contents on internet on the basis of contents of multimedia, comprising the steps of:

extracting feature descriptor from multimedia data inputted through internet;

measuring similarity by calculating vector distance between the extracted feature descriptor and that of the reference pornography; and

determining whether it is a pornography or not by comparing the measured similarity and similarity measurement threshold value.

12. The method of filtering pornography according to claim 11, wherein the feature descriptor is meta data extracted from image data of the multimedia data on the basis of MPEG-7.

13. The method of filtering pornography according to claim 12, wherein the meta data is one on texture descriptor.

14. The method of filtering pornography according to claim 11, wherein if it is determined to be pornography contents by the pornography determining step, a step is further included for displaying the position of the inputted multimedia data on internet.

15. The method of filtering pornography according to claim 11, wherein if it is determined to be pornography contents, a step is further included for blocking the inputted multimedia data.

16. A method of filtering pornography contents in storage device on the basis of contents of multimedia data, comprising the steps of:

inputting multimedia data from the storage device;

extracting feature descriptor from the inputted multimedia data;

measuring similarity by calculating vector distance between the extracted feature descriptor and that of the reference pornography, referring to database of reference pornography stored in a form of feature descriptor; and

determining whether it is a pornography or not by comparing the measured similarity and similarity measurement threshold value.

17. The method of filtering pornography according to claim 16, wherein the feature descriptor is extracted on image data of the multimedia data on the basis of MPEG-7.

18. The method of filtering pornography according to claim 17, wherein the feature descriptor is a texture descriptor on the basis of MPEG-7.

19. The method of filtering pornography according to claim 17, wherein if it is determined to be pornography contents, a step is further included for displaying the image data on display.

20. The method of filtering pornography according to claim 16, wherein if it is determined to be pornography contents, a step is further included for displaying the position in the storage device.

21. The method of filtering pornography according to claim 16, wherein if it is determined to be pornography contents, a step is further included for deleting the multimedia data from the storage device by a predetermined control signal.

22. The method of filtering pornography according to claim 16, wherein a step is further included for inputting search reserved time of the storage device and during the search reserved time, the steps are performed for extracting feature descriptor, measuring similarity and determining whether it is pornography or not.

23. A method of automatically generating database of pornography sites, comprising the steps of:

inputting multimedia data from internet sites to be filtered;

extracting feature descriptor from the inputted multimedia data;

measuring similarity by calculating vector distance between the extracted feature descriptor and that of the reference pornography, referring to database of reference pornography stored in a form of the feature descriptor;

determining whether it is a pornography or not by comparing the measured similarity and similarity measurement threshold value; and

adding information of the internet site to database of pornography sites if it is determined to be pornography by the pornography determining step.

24. The method of generating database of pornography sites according to claim 23, wherein the feature descriptor is meta data extracted from image data of the multimedia data on the basis of MPEG-7.

25. The method of generating database of pornography sites according to claim 24, wherein the meta data is one on texture descriptor.

26. The method of generating database of pornography sites according to claim 23, wherein a step is further included for collecting multimedia data from internet sites to be filtered and for generating temporary filtering database through web search engine.

27. A method for blocking pornography sites from computers for server, comprising the steps of generating database of pornography sites and blocking connection of computers for clients to the internet site, if there is a request for connection of the computer for client to the internet sites stored in the database of pornography sites, wherein the step for generating database of pornography sites comprises the steps of:

extracting feature descriptor of multimedia data inputted from internet sites to be filtered;

measuring similarity by calculating vector distance between the extracted feature descriptor and that of the reference pornography, referring to the database of reference pornography stored in a form of feature descriptor;

determining whether it is a pornography or not by comparing the measured similarity and similarity measurement threshold value; and

adding information on the internet site to database of pornography sites if it is determined to be a pornography by the pornography determining step.

28. The method of generating database of pornography sites according to claim 27, wherein the feature descriptor is meta data extracted from image data of the multimedia data on the basis of MPEG-7.

29. The method of generating database of pornography sites according to claim 28, wherein the meta data is one on texture descriptor.

30. A method of filtering pornography contents of subscriber sites from computer for internet service supplier, comprising the steps of:

inputting web document of the subscriber site from subscriber web database;

extracting feature descriptor form multimedia data of the inputted web document;

measuring similarity by calculating vector distance between the extracted feature descriptor and that of the reference pornography, referring to database of reference pornography stored in a form of feature descriptor; and

determining whether it is a pornography or not by comparing the measured similarity and similarity measurement threshold value.

33. The method of filtering pornography according to claim 30, wherein if it is determined to be pornography sites by pornography determining step, a step is further included for displaying information on the subscriber site in display device of computer for internet service supplier.

34. The method of filtering pornography according to claim 30, wherein if it is determined to be pornography contents by the pornography determining step, a step is further included for transmitting a warning message to the subscriber site.

31. The method of filtering pornography according to claim 31, wherein the feature descriptor is meta data extracted from image data of the multimedia data on the basis of MPEG-7.

32. The method of filtering pornography according to claim 31, wherein the meta data is one on texture descriptor.

35. The recording media for reading computer having computer program for filtering pornography contents on the basis of contents of multimedia, wherein the computer program performs the steps of:

extracting feature descriptor from inputted multimedia data;

measuring similarity between the extracted feature descriptor and that of reference pornography contents; and

determining whether it is a pornography or not by comparing the measured similarity and similarity measurement threshold value.

36. The recording media for reading computer having computer program for filtering pornography contents on internet on the basis of contents of multimedia, wherein the computer program performs the steps of:

extracting feature descriptor from multimedia data inputted through internet;

measuring similarity by calculating vector distance between the extracted feature descriptor and that of the reference pornography, referring to database of reference pornography stored in a form of feature descriptor; and

determining whether it is a pornography or not by comparing the measured similarity and similarity measurement threshold value.

37. The recording media for reading computer having computer program for filtering pornography contents in storage device on the basis of contents of multimedia, wherein the computer program performs the steps of:

extracting feature descriptor from multimedia data in storage device;

measuring similarity by calculating vector distance between the extracted feature descriptor and that of the reference pornography, referring to database of reference pornography stored in a form of feature descriptor; and

determining whether it is a pornography or not by comparing the measured similarity and similarity measurement threshold value.

38. The recording media for reading computer having computer program for automatically generating database of pornography sites, wherein the computer program performs the steps of:

extracting feature descriptor from multimedia data inputted from internet sites to be filtered;

measuring similarity by calculating vector distance between the extracted feature descriptor and that of the reference pornography, referring to database of reference pornography stored in a form of feature descriptor;

determining whether it is a pornography or not by comparing the measured similarity and similarity threshold value; and

adding information on the internet site to database of pornography sites, if it is determined to be a pornography by the pornography determining step.

39. The recording media for reading computer having computer program for blocking pornography sites from computer for server, wherein the computer program comprises the steps of generating database of pornography sites and blocking connection of the computer for client to the internet site, if there is a request for connection of computer for client to internet sites stored in the database of pornography site, and wherein the step for generating database of pornography sites performs the steps of:

extracting feature descriptor from multimedia data inputted from internet sites to be filtered;

measuring similarity by calculating vector distance between the extracted feature descriptor and that of the reference pornography, referring to database of reference pornography stored in a form of feature descriptor;

determining whether it is a pornography or not by comparing the measured similarity and similarity measurement threshold value; and

adding information on the internet site to database of pornography sites, if it is determined to be a pornography by the pornography determining step.

40. The recording media for reading computer having computer program for filtering pornography contents of subscriber sites from computer for internet service supplier, wherein the computer program performs the steps of:

extracting feature descriptor from multimedia data inputted from subscriber site;

measuring similarity by calculating vector distance between the extracted feature descriptor and that of the reference pornography, referring to database of reference pornography stored in a form of feature descriptor; and

determining whether it is a pornography or not by comparing the measured similarity and similarity measurement threshold value.

41. A processing unit of multimedia data comprising:

means for inputting multimedia data from Internet;

means for extracting feature descriptor from the inputted multimedia data;

memory means for storing reference pornography in a form of the feature descriptor;

means for measuring similarity between the extracted feature descriptor and that of reference pornography stored in the memory means; and

means for determining whether it is a pornography or not by comparing the measured similarity and similarity measurement threshold value.

42. The processing unit for multimedia data according to claim 41, wherein a multimedia replay means is further included for blocking replay of the multimedia data, if the multimedia data is determined to be pornography by the pornography determining means.

43. A network connecting device for connecting a plurality of separated networks comprising:

means for inputting multimedia data from internet;

means for extracting feature descriptor from the inputted multimedia data;

memory means for storing reference pornography in a form of the feature descriptor;

means for measuring similarity between the extracted feature descriptor and that of reference pornography stored in the memory means; and

means for determining whether it is a pornography or not by comparing the measured similarity and similarity measurement threshold value.

44. The network connecting device according to claim 43, wherein a means is further included for blocking transmission of the multimedia data between the networks, if the multimedia data is determined to be a pornography by the pornography determining means.

45. A LAN card installed in multimedia data processing unit for preparing LAN circumstances, comprising:

means for inputting multimedia data from internet;

means for extracting feature descriptor from the inputted multimedia data;

memory means for storing reference pornography Ln a form of the feature descriptor;

means for measuring similarity between the extracted feature descriptor and that of reference pornography stored in the memory means; and

means for determining whether it is a pornography or not by comparing the measured similarity and similarity measurement threshold value.

46. The LAN card according to claim 45, wherein a means is further included for blocking transmission of the multimedia data, if the multimedia data is determined to be a pornography by the pornography determining means.