Comparison between the Jasper library and snapshot 60

Jasper is an unofficial Implementation of MPEG-4, implemented by a foreign university teacher, it is also a good LIB, you can from http://www.ece.uvic.ca /~ Mdadams/jasper/contains the VC project file.

JPEG 60 is an official implementation of JPEG. Only makefile is provided for compiling.

We will not discuss the Graphics compression algorithm here. We will mainly discuss its performance issues:

1. A high-quality image is provided in 2000's. Even with a compression ratio of 100 times, JPEG won't work, and mosaic will appear when the compression ratio is high to a certain extent.

2. High-quality images are at the cost of a large number of operations. Therefore, the time for using, generally, it takes 2 seconds to ENCODE or DECODE the BMP image of 1024*768*24 (P4-3. 0) around the time, this time is terrible for real-time applications. In the implementation of JPEG, Jasper needs to convert the image to be encoded into its internal format to ensure processing of multiple images, then use the JP2000 algorithm to ENCODE. However, JPEG has a good performance in terms of time. The compression of the above image is within MS, which is good for most real-time applications.

Although the implementation of Jasper is not good enough, I think its quality can still attract many people. For applications with low time requirements, 2 seconds is not a long time, in the near future, I think we will have a better implementation of 2000. at which point we can use it.