29 Sep 2021  ·  Mohammad Younesi, Yalda Mohsenzadeh ·

Every day, we are bombarded with many face photographs, whether on social media, television, or smartphones. From an evolutionary perspective, faces are intended to be remembered, mainly due to survival and personal relevance. However, all these faces do not have the equal opportunity to stick in our minds. It has been shown that memorability is an intrinsic feature of an image but yet, it’s largely unknown what attributes make the images more memorable. In this work, we aim to address this question by proposing a fast approach to modify and control the memorability of face images. In our proposed method, we first find a hyperplane in the latent space of StyleGAN to separate high and low memorable images. We then modify the image memorability (while keeping the identity and other facial features such as age, emotion, etc.) by moving in the positive or negative direction of this hyperplane normal vector. We further analyzed how different layers of the styleGAN augmented latent space contribute to face memorability. These analyses showed how each individual face attribute makes images more or less memorable. Most importantly, we evaluated our proposed method for both real and unreal (generated) face images. The proposed method successfully modifies and controls the memorability of real human faces as well as unreal(generated) faces. Our proposed method can be employed in photograph editing applications for social media, learning aids, or advertisement purposes.

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