Lossless Image Compression using Differential Transfer

摘要

Lossless image compression using differential transfers may involve an image compression unit receiving image data for an image in a sequence of images and transmitting the image data such that image data for at least some image tiles is transmitted using lossy compression due to resource limitations. The image compression unit may then receive image data for a subsequent image in the sequence and determine that the image data for at least some tiles does not change relative to the image data for corresponding tiles of the previous image. The image compression unit may then transmit image data in a manner sufficient to create lossless versions of tiles for which lossily compressed image data was sent previously.

主权项

1. A method, comprising:
performing, by a computing device:
receiving image data for a first image in a sequence of images, wherein each image in the sequence comprises a plurality of image tiles;transmitting the image data for the first image, wherein said transmitting comprises transmitting image data for at least some of the first image's plurality of tiles using lossy compression due to resource constraints;receiving image data for a subsequent image in the sequence of images;determining that the image data for at least some of the subsequent image's plurality of tiles does not change more than a predetermined amount relative to image data for corresponding tiles of the first image; andtransmitting the image data for the subsequent image in a manner sufficient to create lossless versions of tiles for which lossily compressed data was previously sent.