Towards Evaluating Gaussian Blurring in Perceptual Hashing as a Facial Image Filter
This addresses the issue of unauthorized image use for individuals on social media, but it is incremental as it focuses on a specific enhancement to an existing method.
The paper tackles the problem of detecting misuse of personal face images on social media by evaluating Gaussian blurring as a filter in perceptual hashing to improve robustness against adversarial attacks like cropping, text addition, and rotation, hypothesizing it will increase accuracy.
With the growth in social media, there is a huge amount of images of faces available on the internet. Often, people use other people's pictures on their own profile. Perceptual hashing is often used to detect whether two images are identical. Therefore, it can be used to detect whether people are misusing others' pictures. In perceptual hashing, a hash is calculated for a given image, and a new test image is mapped to one of the existing hashes if duplicate features are present. Therefore, it can be used as an image filter to flag banned image content or adversarial attacks --which are modifications that are made on purpose to deceive the filter-- even though the content might be changed to deceive the filters. For this reason, it is critical for perceptual hashing to be robust enough to take transformations such as resizing, cropping, and slight pixel modifications into account. In this paper, we would like to propose to experiment with effect of gaussian blurring in perceptual hashing for detecting misuse of personal images specifically for face images. We hypothesize that use of gaussian blurring on the image before calculating its hash will increase the accuracy of our filter that detects adversarial attacks which consist of image cropping, adding text annotation, and image rotation.