  This work presents an analysis of state-of-the-art learning-based image
compression techniques. We compare 8 models available in the Tensorflow
Compression package in terms of visual quality metrics and processing time,
using the KODAK data set. The results are compared with the Better Portable
Graphics (BPG) and the JPEG2000 codecs. Results show that JPEG2000 has the
lowest execution times compared with the fastest learning-based model, with a
speedup of 1.46x in compression and 30x in decompression. However, the
learning-based models achieved improvements over JPEG2000 in terms of quality,
specially for lower bitrates. Our findings also show that BPG is more efficient
in terms of PSNR, but the learning models are better for other quality metrics,
and sometimes even faster. The results indicate that learning-based techniques
are promising solutions towards a future mainstream compression method.
