Layers provide an elegant means to control visual qualityĪnd manage channel capacity for streaming compressed imagery over lowīandwidth links. Used for a specific sensor would need to be optimized to accommodateĪny unique properties of that particular imagery collection system.Īpplications need a sufficient number of codestream layers for optimalīandwidth and memory management across such a wide range of Note that the actual target bit rates and numbers of Quality Layers Meet application requirements or quality requirements. Read More Other Supported Compression / Decompression Formats Using C, One can also compress / decompress many other formats including. Some systems may change the exact bitrates and number of layers to A J2K file is an image that is compressed using the wavelet compression instead of DCT compression. That said, there is a general message across all the profiles such as: The profiles provides examples giving the number of layers and bit rates. On the other hand, you can take a look at the BIIF Profile for JPEG 2000 which provides several compression profiles for different situations. Also known as JP2, JPEG 2000 uses wavelet compression as opposed to the DCT compression used. Pick a profile in the BIIF Profile for JPEG 2000 j2k, a Photoshop plug-in for writing JPEG2000 (JP2) files. So if they software uses logarithmic spacing for their quality layers that might be a reasonable place to start. Kakadu is heavily used in industry and their J2K compression software is highly trusted. When only one rate is specified, an internal heuristicĭetermines a lower bound and logarithmically spaces the layer rates When two rates are specified, the number of layers must be 2 or moreĪnd intervening layers will be assigned roughly logarithmically spacedīit-rates. It shows the input parameters for Kakadu's kdu_compress utility. The good news is that there is plenty of guidance! Here are two options. The number of layers and the bit rates associated with those layers should be set according to the needs of the users and systems which will consume the imagery.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |