Exploiting Fine-Grained DCT Representations for Hiding Image-Level Messages within JPEG Images. (arXiv:2305.06582v1 [cs.CV])

Unlike hiding bit-level messages, hiding image-level messages is more
challenging, which requires large capacity, high imperceptibility, and high
security. Although recent advances in hiding image-level messages have been
remarkable, existing schemes are limited to lossless spatial images as covers
and cannot be directly applied to JPEG images, the ubiquitous lossy format
images in daily life. The difficulties of migration are caused by the lack of
targeted design and the loss of details due to lossy decompression and
re-compression. Considering that …

arxiv capacity fine-grained image images messages security