摘要
设计了一种基于字节压缩的位图数据压缩方法.根据三维打印快速成形中位图数据的特点,本压缩方法分别采用1个byte、2个byte和4个byte来表示压缩数据.该压缩方法的压缩比较高,经过对多个CAD模型切片后所得位图数据的压缩前后数据大小的比较,发现最小压缩比为12.1∶1,最大达53.9∶1,压缩效果比较理想.本方法在对数据进行压缩和解压的过程中,不需要复杂的计算,速度快,耗时少,对三维打印快速成形机这种有上千层位图数据需要处理的场合不会构成瓶颈,可以较好地满足三维打印快速成形系统的要求.
One compressing method of bitmap data based on compressing bytes was designed. 1 byte, 2 byte and 4 byte were chosen to denote the compressed data in this compressing method, according to the characters of the layered bitmap data in rapid prototyping system of three dimensional printing. By comparing the compressed bitmap data of many computer aided design models with the uncompressed, the minimum compressing rate of the compressing method was 12.1：1 and the maximal was 53.9 ： 1. The satisfactory compressing effect was achieed. The compressing way didn＇t need complicated computing in the compressing and decompressing process, which would not form the bottleneck on the condition of thousands of pieces of bitmap data to be managed in the rapid prototyping system of three dimensional printing. The compressing rate is higher and its compressing and decompressing velocity is faster in this method, being well suitable in the rapid prototyping system of three dimensional printing.
出处
《华中科技大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2008年第5期90-92,共3页
Journal of Huazhong University of Science and Technology(Natural Science Edition)
基金
湖北省自然科学基金资助项目(2005ABA181)
关键词
快速成形
三维打印
位图数据
数据压缩
压缩单元
压缩比
rapid prototyping
three dimensional printing
bitmap data
data compressing
compressing cell
compressing rate
