The JPEG still picture compression standard
Communications of the ACM - Special issue on digital multimedia systems
International Journal of Computer Vision
Exploiting the JPEG Compression Scheme for Image Retrieval
IEEE Transactions on Pattern Analysis and Machine Intelligence
JPEG Still Image Data Compression Standard
JPEG Still Image Data Compression Standard
Algorithms for Manipulating Compressed Images
IEEE Computer Graphics and Applications
Compressed-domain techniques for image/video indexing and manipulation
ICIP '95 Proceedings of the 1995 International Conference on Image Processing (Vol. 1)-Volume 1 - Volume 1
Iteration-free clustering algorithm for nonstationary image database
IEEE Transactions on Multimedia
Automated event clustering and quality screening of consumer pictures for digital albuming
IEEE Transactions on Multimedia
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With the increasing popularity of digital camera, organizing and managing the large collection of digital photos effectively are therefore required. In this paper, we study the techniques of photo album sorting, clustering and compression in DCT frequency domain without having to decompress JPEG photos into spatial domain firstly. We utilize the first several non-zero DCT coefficients to build our feature set and calculate the energy histograms in frequency domain directly. We then calculate the similarity distances of every two photos, and perform photo album sorting and adaptive clustering algorithms to group the most similar photos together. We further compress those clustered photos by a MPEG-like algorithm with variable IBP frames and adaptive search windows. Our methods provide a compact and reasonable format for people to store and transmit their large number of digital photos. Experiments prove that our algorithm is efficient and effective for digital photo processing.