{"title":"调色板图像和数字地图的渐进编码","authors":"S. Forchhammer, J. M. Salinas","doi":"10.1109/DCC.2002.999974","DOIUrl":null,"url":null,"abstract":"A 2D version of PPM (Prediction by Partial Matching) coding is introduced simply by combining a 2D template with the standard PPM coding scheme. A simple scheme for resolution reduction is given and the 2D PPM scheme extended to resolution progressive coding by placing pixels in a lower resolution image layer. The resolution is increased by a factor of 2 in each step. The 2D PPM coding is applied to palette images and street maps. The sequential results are comparable to PWC. The PPM results are a little better for the palette images with few colors (up to 4-5 bpp) and a little worse for the images with more colors. For street maps the 2D PPM is slightly better. The PPM based resolution progressive coding provides a better result than coding the resolution layers as individual images. Compared to GIF the resolution progressive 2D PPM's coding efficiency is significantly better. An example of combined content-layer/spatial progressive coding is also given.","PeriodicalId":420897,"journal":{"name":"Proceedings DCC 2002. Data Compression Conference","volume":"51 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2002-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"18","resultStr":"{\"title\":\"Progressive coding of palette images and digital maps\",\"authors\":\"S. Forchhammer, J. M. Salinas\",\"doi\":\"10.1109/DCC.2002.999974\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"A 2D version of PPM (Prediction by Partial Matching) coding is introduced simply by combining a 2D template with the standard PPM coding scheme. A simple scheme for resolution reduction is given and the 2D PPM scheme extended to resolution progressive coding by placing pixels in a lower resolution image layer. The resolution is increased by a factor of 2 in each step. The 2D PPM coding is applied to palette images and street maps. The sequential results are comparable to PWC. The PPM results are a little better for the palette images with few colors (up to 4-5 bpp) and a little worse for the images with more colors. For street maps the 2D PPM is slightly better. The PPM based resolution progressive coding provides a better result than coding the resolution layers as individual images. Compared to GIF the resolution progressive 2D PPM's coding efficiency is significantly better. An example of combined content-layer/spatial progressive coding is also given.\",\"PeriodicalId\":420897,\"journal\":{\"name\":\"Proceedings DCC 2002. Data Compression Conference\",\"volume\":\"51 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2002-04-02\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"18\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Proceedings DCC 2002. Data Compression Conference\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/DCC.2002.999974\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Proceedings DCC 2002. Data Compression Conference","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/DCC.2002.999974","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Progressive coding of palette images and digital maps
A 2D version of PPM (Prediction by Partial Matching) coding is introduced simply by combining a 2D template with the standard PPM coding scheme. A simple scheme for resolution reduction is given and the 2D PPM scheme extended to resolution progressive coding by placing pixels in a lower resolution image layer. The resolution is increased by a factor of 2 in each step. The 2D PPM coding is applied to palette images and street maps. The sequential results are comparable to PWC. The PPM results are a little better for the palette images with few colors (up to 4-5 bpp) and a little worse for the images with more colors. For street maps the 2D PPM is slightly better. The PPM based resolution progressive coding provides a better result than coding the resolution layers as individual images. Compared to GIF the resolution progressive 2D PPM's coding efficiency is significantly better. An example of combined content-layer/spatial progressive coding is also given.
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号
