Fast content access and retrieval of JPEG compressed images
作者：
Highlights：
• A novel fast algorithm to access the content of JPEG compressed images is presented.
• Extracting 2×2 and 4×4 sub-block averages from JPEG bitstream without full decompression.
• The extracted sub-block averages can directly construct color histogram or an approximated picture.
• The presented method can be efficiently used for fast exploring or retrieval of JPEG coded images.
• Finding block averages from JPEG bitstream at the same accuracy as earlier works but faster.
摘要
•A novel fast algorithm to access the content of JPEG compressed images is presented.•Extracting 2×2 and 4×4 sub-block averages from JPEG bitstream without full decompression.•The extracted sub-block averages can directly construct color histogram or an approximated picture.•The presented method can be efficiently used for fast exploring or retrieval of JPEG coded images.•Finding block averages from JPEG bitstream at the same accuracy as earlier works but faster.
论文关键词：JPEG images,Fast content access,DC image,Image retrieval,Compressed domain
论文评审过程：Received 30 March 2015, Revised 14 December 2015, Accepted 7 May 2016, Available online 9 May 2016, Version of Record 14 May 2016.
论文官网地址：https://doi.org/10.1016/j.image.2016.05.005
