Image encryption through dynamic compression code words

Patent metadata

Field	Value
Publication number	US-11700385-B2
Application number	US-202117219353-A
Country	US
Kind code	B2
Filing date	Mar 31, 2021
Priority date	Jul 24, 2017
Publication date	Jul 11, 2023
Grant date	Jul 11, 2023

Abstract

Embodiments of a system and method for secure processing of image data are described. Image data included in image files may be encrypted and compressed in a single step using dynamically identified compression/encryption information such as code word tables.

First claim

What is claimed is:

1. A computer-implemented method comprising:
identifying, by at least one of an optical scanning device, a control server, an image processing server, or a computing device configured to transmit or receive image data, a detail type for an image file, wherein the detail type comprises at least one of an image property or a compression detail;
obtaining, by the at least one of the optical scanning device, the control server, the image processing server, or the computing device, a count of records corresponding to the detail type;
determining, by the at least one of the optical scanning device, the control server, the image processing server, or the computing device, that the count of records exceeds a threshold;
receiving or retrieving, by the at least one of the optical scanning device, the control server, the image processing server, or the computing device, a set of raw image files corresponding to the detail type;
identifying, by the at least one of the optical scanning device, the control server, the image processing server, or the computing device, current compression and encryption information corresponding to the detail type;
generating, by the at least one of the optical scanning device, the control server, the image processing server, or the computing device, updated compression and encryption information based at least in part on the current compression and encryption information;
comparing, by the at least one of the optical scanning device, the control server, the image processing server, or the computing device, compression details for images compressed using the current and updated compression; and
determining, based on the comparing, whether to maintain the current compression and encryption information or replacing the current compression and encryption information with the updated compression and encryption information.

2. The computer-implemented method of claim 1 , wherein the comparing comprises:
first compressing the image file based on the current compression information so as to generate a first compressed image file; and
second compressing the image file based on the updated compression information so as to generate a second compressed image file.

3. The computer-implemented method of claim 2 , wherein at least one of the first compressing or the second compressing comprises identifying a sequence of pixel information from an image data portion of a raw image file and adding a record to the first or second compressed image file representing the sequence using fewer resources.

4. The computer-implemented method of claim 3 , wherein the record to be added is identified by comparing the sequence to an entry in a code word table.

5. The computer-implemented method of claim 2 , further comprising, in response to determining that the second compressed image file has a processing metric exceeding that of the first compressed image file, replacing the current compression and encryption information with the updated compression and encryption information.

6. The computer-implemented method of claim 5 , wherein the processing metric comprises at least one of: an average file size of image files, a difference in a quantity of memory used to store the image files, an entropy difference for the image files, or a difference in an amount of time to store the image files on the memory.

7. The computer-implemented method of claim 1 , wherein the image property comprises an identifier for the current compression and encryption information.

8. The computer-implemented method of claim 7 , wherein the identifier comprises an identifier for a code word table.

9. The computer-implemented method of claim 1 , wherein identifying the current compression and encryption information is based on a duration of time since compression information was generated for an image.

10. The computer-implemented method of claim 9 , further comprising periodically generating a new table for a particular image source.

11. The computer-implemented method of claim 10 , wherein the new table is generated every six months.

12. The computer-implemented method of claim 1 , wherein the current compression or encryption information is maintained in response to determining that the current compression information provides a higher level of compression or encryption than the updated compression information.

13. The computer-implemented method of claim 1 , wherein the image property comprises at least one of: a format of the image file, a source of the image file, a type of the image file, an image file name, an image color mode, a metadata of the image file, a device used to capture the image file, a time the image file was captured, a date the image file was captured, or a location where the image file was captured.

14. The computer-implemented method of claim 12 , wherein each of the current compression and encryption information and the updated compression and encryption information comprises a variable length code table.

15. The computer-implemented method of claim 13 , wherein the image file comprises an image of a distribution item, and wherein the method further comprises identifying, using an object recognition device, a type for the image file, wherein the type comprises at least one of a parcel, a mail piece, a flat, a pre-printed envelope, or a pre-sorted item, and wherein different variable length code tables are used for compressing and encrypting different identified types.

16. An image processing system comprising:
a computer-readable memory storing executable instructions; and
at least one of an optical scanning device, a control server, an image processing server, or a computing device configured to transmit or receive image data in communication with the computer-readable memory and configured to execute the executable instructions to at least:
identify a detail type for an image file, wherein the detail type comprises at least one of an image property or a compression detail;
obtain a count of records corresponding to the detail type;
determine that the count of records exceeds a threshold;
receive or retrieve a set of raw image files corresponding to the detail type;
identify current compression and encryption information corresponding to the detail type;
generate updated compression and encryption information based at least in part on the current compression and encryption information;
compare compression details for images compressed using the current and updated compression; and
determine, based on the comparing, whether to maintain the current compression and encryption information or replace the current compression and encryption information with the updated compression and encryption information.

17. The image processing system of claim 16 , wherein the at least one of the optical scanning device, the control server, the image processing server, or the computing device is further configured to execute the executable instructions to:
compress the image file based on the current compression information so as to generate a first compressed image file;
compress the image file based on the updated compression information so as to generate a second compressed image file; and
in response to determining that the second compressed image file has a processing metric exceeding that of the first compressed image file, replace the current compression and encryption information with the updated compression and encryption information.

18. The image processing system of claim 16 , wherein the image property comprises at least one of: a f

Assignees

• United States Postal Service
• United States Postal Services

Inventors

• Simpson Ryan J

Classifications

• G06V30/413

  Classification of content, e.g. text, photographs or tables · CPC title

• H04N19/172

  the region being a picture, frame or field · CPC title

• H04N19/182 Primary

  the unit being a pixel · CPC title

• G06F21/6209 Primary

  to a single file or object, e.g. in a secure envelope, encrypted and accessed using a key, or with access control rules appended to the object itself · CPC title