  Learned Image Compression (LIC) has recently become the trending technique
for image transmission due to its notable performance. Despite its popularity,
the robustness of LIC with respect to the quality of image reconstruction
remains under-explored. In this paper, we introduce an imperceptible attack
approach designed to effectively degrade the reconstruction quality of LIC,
resulting in the reconstructed image being severely disrupted by noise where
any object in the reconstructed images is virtually impossible. More
specifically, we generate adversarial examples by introducing a Frobenius
norm-based loss function to maximize the discrepancy between original images
and reconstructed adversarial examples. Further, leveraging the insensitivity
of high-frequency components to human vision, we introduce Imperceptibility
Constraint (IC) to ensure that the perturbations remain inconspicuous.
Experiments conducted on the Kodak dataset using various LIC models demonstrate
effectiveness. In addition, we provide several findings and suggestions for
designing future defenses.
