ABSTRACT
The cloud is characterized by a large amount of computing resources, storage, and data [226]. Imagining a cloud that collects a huge number of images, for example, Google street view images [227], when you randomly take a picture with your phone on the street, you can often find some highly correlated images in the cloud that were taken at the same location at different viewpoints and angles, focal lengths, and illuminations. If you try to share the photo with friends through the cloud, it is problematic to use conventional image coding (e.g., JPEG) that usually provides only 8:1 compression ratio [228]. It will consume a lot of precious power and network bandwidth to transmit such a high-resolution and high-quality JPEG image. It would be more convenient to take advantage of the cloud for compression and transmission if there is a high probability of finding very similar images in the cloud.
