SYSTEM AND METHOD FOR PREVENTING DUPLICATE UPLOADS OF MODIFIED PHOTOS IN A SYNCHRONIZED CONTENT MANAGEMENT SYSTEM

• US 20140181057A1
• Filed: 12/20/2012
• Published: 06/26/2014
• Est. Priority Date: 12/20/2012
• Status: Active Grant

• Current Assignee: Dropbox, Inc.
• Original Assignee: Dropbox, Inc.
• Inventors: Euresti, David, Smith, Brian, Chen, Alicia, Motes, Aston, Hunter, Rian, Tang, Jie
• Granted Patent: US 9,104,687 B2
• Time in Patent Office: Days
• US Class Current: 707/698
• CPC Class Codes: G06F 16/174 Redundancy elimination performed by the file system management of the data involved in backup or backup restore using de-duplication of the data G06F11/14

Abstract

A method and system for automatically rotating image files and preventing duplicate uploads in a remote file storage system is described. The system receives an image file. The system calculates a hash value associated with newly uploaded files. The system then automatically rotates the images based on orientation data associated with the files (if included). The system then compares the hash value(s) associated with the new file(s) with the hash values from the existing files stored on the remote file storage system. If the hash values of any of the new files to be uploaded match a hash value on the hash value list, then the system prevents the new files from being uploaded to the remote file storage system.

Claims

1. A computer-implemented method of modifying image files and uploading the modified image file to a content management system, comprising:

for a first image file;

receive the first image file, wherein the first image file contains a first image in a first orientation and orientation data for the first image;

calculate, by at least one processor, a first hash value for the first image file that corresponds to the first image in the first orientation;

modify, by at least one processor, the first image file by rotating the first image from the first orientation to a second orientation based on the orientation data; and

store the modified first image file in memory,

for a second image file;

receive the second image file, wherein the second image file contains a second image in a first orientation; and

calculate, by at least one processor, a second hash value for the second image file that corresponds to the second image in the first orientation; and

determine whether the first hash value equals the second hash value;

in response to determining that the first hash value equals the second hash value, treating the second image file as a duplicate of the first image file.

2. The computer-implemented method of claim 1, wherein the second image file comprises the first image in the first orientation.

3. The computer-implemented method of claim 1, wherein treating the second image file as a duplicate of the first image file further comprises deleting the second image file.

4. The computer-implemented method of claim 1, wherein treating the second image file as a duplicate of the first image file comprises deleting the first image file.

5. The computer-implemented method of claim 1, wherein the first image file is received from a first client device and the second image file is received from a second client device.

6. The computer-implemented method of claim 1, wherein the step of modifying the first image file by rotating the first image further comprises rotating the first image by an amount chosen from a group consisting of:

ninety degrees, one-hundred and eighty degrees, and minus ninety degrees;

or flipping the image file across an axis chosen from a group consisting of;

vertical, horizontal, and diagonal.

7. The computer-implemented method of claim 1, further comprising updating the first image file to include information that the first image file is in the second orientation.

8. The computer-implemented method of claim 7, further comprising storing the updated first image file in memory operatively coupled to the at least one processor.

9. The computer-implemented method of claim 1, further comprising determining whether the second image file contains orientation data.

10. A system of preventing storage of image files, within the context of a synched content management system, that were previously modified and stored on the content management system, comprising at least one processor configured to:

receive a first image file having a first image in a first orientation;

calculate a hash value for the first image file that corresponds to the first image in the first orientation;

rotate the first image from the first orientation to a second orientation, wherein the second orientation is based on orientation data contained in the first image file;

update the first image file to include orientation information that corresponds to the first image in the second orientation; and

initiate storage of the updated first image file.

11. The system of claim 10, wherein the at least one processor is further configured to:

determine, prior to initiating storage of the updated first image file, whether the updated first image file is a duplicate of a previously stored second image file; and

if so, prevent the initiation of storage of the updated first image file.

12. The system of claim 11, wherein determining whether the updated first image file is a duplicate of a previously uploaded second image file further comprises determining if the hash value for the first image file is contained in a list of hash values, wherein the list of hash values comprises a hash value for the second image file that corresponds to a second image in a first orientation.

13. The system of claim 11, wherein the step of determining whether the updated first image file is a duplicate of a previously stored second image file is performed prior to the step of rotating the first image.

14. A content management system comprising:

at least one processor; and

memory operatively coupled to the at least one processor,

wherein the at least one processor is configured to;

receive a first image file having an image in a first orientation;

calculate a first hash value for the first image file that corresponds to the first image in the first orientation;

modify the first image file by rotating the first image from the first orientation to a second orientation if the first image file contains orientation information;

determine whether the modified first image file is a duplicate of a second image file comprising a second image, previously stored in the memory, by comparing the first hash value for the first image file to a second hash value for the second image file.

15. The content management system of claim 14, wherein the at least one processor is further configured to, if the first image file is not a duplicate image file, store the modified first image file in the memory.

16. The content management system of claim 14, wherein the at least one processor is further configured to:

update the first image file to include information regarding rotation of the first image from the first orientation into the second orientation;

store the updated first image file to the memory; and

add the first hash value to the list of hash values for previously received and modified image files.

17. The content management system of claim 14, wherein determining whether the modified first image file is a duplicate of a second file is carried out within the context of a synched content management system.

18. A content management system comprising:

a means for receiving a first image file having an image in a first orientation;

a means for calculating a first hash value for the first image file;

a means for rotating the first image file from the first orientation into a second orientation; and

a means for determining if the first image file is a duplicate of a previously modified and uploaded second image file.

19. The content management system of claim 18, wherein the means for calculating a first hash value is chosen from a group consisting of a client device and at least one content management server.

20. The content management system of claim 18, wherein the means for determining further comprises a means for comparing the first hash value to a second hash value for modified second image file is based on a second image in a first orientation.

21. The content management system of claim 18, wherein the content management system is a synchronized content management system.

22. The content management system of claim 18, wherein the first image file is received from a first client device configured to run a first operating system and the second image file is received from a second client device configured to run a second operating system.