Image segmentation for anonymization for image processing
An input image is divided into segments. The segments may be reassembled to reform the input image. The order of the segments may be stored in an encrypted database for which approved applications have the decryption key but users do not. This allows the approved applications to determine the order and reform the input image without allowing users to do the same. To further increase the difficulty of reforming the input image, the segments may be transformed. Example transformations include rotation and mirroring. The encrypted database may store an indication of the transformation applied to each segment. The effort of reforming the input image without access to the database is increased substantially. The reformed input image may be stored in transient memory only, without being stored to long-term storage. Thus, the reformed image cannot be accessed from a file system by unauthorized users.
1. A method comprising:
accessing, by one or more processors, an image;
segmenting, by the one or more processors, the image into a plurality of image segments, the plurality of image segments being usable to generate the image according to an original order, the plurality of image segments comprising a first image segment and a second image segment;
transforming the first image segment using a first transformation;
transforming the second image segment using a second transformation different than the first transformation;
storing the image using a modified order of the plurality of image segments; and
storing encrypted data indicating the original order of the plurality of image segments, the encrypted data indicating that the first transformation was applied to the first image segment and that the second transformation was applied to the second image segment.
2. The method of claim 1 , wherein the first transformation is a rotation.
3. The method of claim 1 , wherein the first transformation is a mirroring.
4. The method of claim 1 , wherein: the image is a 2-dimensional image having a horizontal image size and a vertical image size; and each image segment of the plurality of image segments has a horizontal size less than the horizontal image size and a vertical size less than the vertical image size.
5. The method of claim 1 , wherein each image segment of the plurality of image segments is no larger than ten pixels in any dimension.
6. The method of claim 1 , further comprising: decrypting the encrypted data; reconstructing, from the plurality of image segments and based on the decrypted data, the image; and performing image processing operations using the reconstructed image without storing the reconstructed image to long-term storage.
7. A system comprising:
one or more hardware processors; and
a memory that stores instructions that, when executed by the one or more processors, cause the one or more processors to perform operations comprising:
accessing an image;
segmenting the image into a plurality of image segments, the plurality of image segments being usable to generate the image according to an original order, the plurality of image segments comprising a first image segment and a second image segment;
transforming the first image segment using a first transformation;
transforming the second image segment using a second transformation different than the first transformation;
storing the image using a modified order of the plurality of image segments; and
storing encrypted data indicating the original order of the plurality of image segments, the encrypted data indicating that the first transformation was applied to the first image segment and that the second transformation was applied to the second image segment.
8. The system of claim 7 , wherein the first transformation is a rotation.
9. The system of claim 7 , wherein the first transformation is a mirroring.
10. The system of claim 7 , wherein: the image is a 2-dimensional image having a horizontal image size and a vertical image size;
each image segment of the plurality of image segments has a horizontal size less than the horizontal image size and a vertical size less than the vertical image size.
11. The system of claim 7 , wherein each image segment of the plurality of image segments is no larger than ten pixels in any dimension.
12. The system of claim 7 , further comprising:
decrypting the encrypted data; reconstructing, from the plurality of image segments and based on the decrypted data, the image; and performing image processing operations using the reconstructed image without storing the reconstructed image to long-term storage.
13. A non-transitory computer-readable medium that stores instructions that, when executed by one or more processors, cause the one or more processors to perform operations comprising:
accessing an image;
segmenting the image into a plurality of image segments, the plurality of image segments being usable to generate the image according to an original order, the plurality of image segments comprising a first image segment and a second image segment;
transforming the first image segment using a first transformation;
transforming the second image segment using a second transformation different than the first transformation;
storing the image using a modified order of the plurality of image segments; and
storing encrypted data indicating the original order of the plurality of image segments, the encrypted data indicating that the first transformation was applied to the first image segment and that the second transformation was applied to the second image segment.
14. The non-transitory computer-readable medium of claim 13 , wherein the first transformation is a rotation.
15. The non-transitory computer-readable medium of claim 13 , wherein the first transformation is a mirroring.
16. The non-transitory computer-readable medium of claim 13 , wherein: the image is a 2-dimensional image having a horizontal image size and a vertical image size; and each image segment of the plurality of image segments has a horizontal size less than the horizontal image size and a vertical size less than the vertical image size.
17. The non-transitory computer-readable medium of claim 13 , wherein each image segment of the plurality of image segments is no larger than ten pixels in any dimension.
18. The non-transitory computer-readable medium of claim 13 , wherein the operations further comprise:
decrypting the encrypted data; reconstructing, from the plurality of image segments and based on the decrypted data, the image; and performing image processing operations using the reconstructed image without storing the reconstructed image to long-term storage.