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An Identity-Preserved Model for Face Sketch-Photo Synthesis

Face sketch-photo synthesis can be regarded as an image-to-image translation problem. Although many generative models achieve good translations from sketches to photos, they still have limitations in preserving face identity due to the huge modality gap of the two domains. To this end, we propose an identity-preserved adversarial model (IPAM), which includes an extended U-Net to increase the weight of the original sketch in translation, two discriminators focusing on the real or fake image concatenation of two domains to learn more styles of the target domain, and an identity constraint to request the fakes and the real targets to have zero cosine distance in feature space. We evaluate our method on two face sketch databases with face recognition. The results demonstrate our translation method is superior to the existing methods in maintaining face identity information.