Wavelet-Based Deep Auto Encoder-Decoder (WDAED)-Based Image Compression

• Published in: IEEE transactions on circuits and systems for video technology Vol. 31; no. 4; pp. 1452 - 1462
• Main Authors: Mishra, Dipti, Singh, Satish Kumar, Singh, Rajat Kumar
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.04.2021; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Algorithms; autoencoder; CNN; Coders; compression; Computing time; Convolutional codes; Datasets; Decoding; deep; DWT; Encoders-Decoders; frequency; Haar; Image coding; Image compression; Image quality; Image resolution; Machine learning; Wavelet; Wavelet transforms
• ISSN: 1051-8215; 1558-2205
• DOI: 10.1109/TCSVT.2020.3010627

In this work, we propose a Wavelet-based Deep Auto Encoder-Decoder Network (WDAED) based image compression which takes care of the various frequency components present in an image. Specifically, we demonstrate improvements over prior approaches utilizing this framework by introducing: (a) wavelet transform pre-processing for decomposing image into different frequencies for their separate processing (b) a very deep super-resolution network as a decoder of the convolutional autoencoder in order to achieve a good quality decompressed image. The end-to-end learning is performed for four wavelet sub-bands in parallel, minimizing the computational time. The encoder compresses the image by generating the latent space representations, whereas the decoder transforms the latent space to image space. The algorithm has been tested on various standard datasets i.e., ImageNet, Set 5, Set 14, Live 1, Kodak, Classic 5, General 100 and CLIC 2019 dataset. The proposed algorithm clearly exhibited the compression performance improvement of approximately 5%, 5.5%, and 13% in terms of PSNR, PSNRB and SSIM respectively.