Video stream modification to defeat detection
View Patent ↗A method and system for detecting automatic ad detection is presented in which video streams are modified such that features cannot be automatically recognized or statistical parameters and fingerprints derived from the video stream cannot be matched against fingerprints of known video segments in a database.
1. A method of altering an image to prevent the detection of the image, the method comprising:
receiving the image;
identifying a plurality of types of modifications to be made to the image, the modifications, when applied, causing a spatial alteration of the image;
randomly selecting a first type of the types of modifications; and
altering at least a portion of the image by applying the randomly selected first type of modification to the image, wherein the altering reduces the ability to detect the image.
2. The method of claim 1 , wherein the altering at least a portion of the image includes varying a portion of the image with static content.
3. The method of claim 1 , wherein the altering at least a portion of the image includes varying a set of pixels to alter a color histogram associated with image.
4. The method of claim 1 , wherein the altering at least a portion of the image includes varying a set of pixels to alter a color coherence vector associated with the image.
5. The method of claim 1 , wherein the plurality of types of modifications includes at least one of staling, shifting, cropping, rotation, stretching and warping of the image.
6. The method of claim 1 , wherein the spatial modification does not perceivably degrade the image quality.
7. The method of claim 1 , further comprising:
analyzing the altered image to determine if the altered image has been sufficiently altered to reduce the ability to detect the image.
8. A method of altering at least one image of a series of images to prevent the detection of the series of images, the method comprising:
receiving the series of images;
identifying a plurality of types of modifications to be made to at least one image of the series of images, the modifications, when applied, causing a spatial alteration of the at least one image;
selecting at least two of the types of modifications;
randomly selecting at least a first and a second image of the series of images; and
altering at least a portion of the first image by applying one of the at least two types of modifications and altering at least a portion of the second image by applying a different of the at least two types of modifications, wherein the altering reduces the ability to detect the series of images.
9. The method of claim 8 , wherein the altering at least a portion of at least the first image or the second image includes varying a portion that includes static content.
10. The method of claim 8 , wherein the altering at least a portion of at least the first image or the second image includes varying a set of pixels to alter a color histogram associated with the image.
11. The method of claim 8 , wherein the altering at least a portion of at least the first image or the second image includes varying a set of pixels to alter a color coherence vector associated with the image.
12. The method of claim 8 , wherein the series of images are frames of a video.
13. The method of claim 8 , wherein the plurality of types of modifications includes at least one of scaling, shifting, cropping, rotation, stretching and warping of the image.
14. The method of claim 8 , wherein the spatial modification does not perceivably degrade the image quality.
15. The method of claim 8 , further comprising:
analyzing at least one of the altered images to determine if it has been sufficiently altered to reduce the ability to detect the series of images.