| 2. | To analyze conveniently , analysis personnel regularity need to make the operation of background color filling , anode 、 cathode filling , gradual change filling of anode and cathode to eliminate burr phenomena and mosaic phenomena during the filling process . earthquake interpret deal with a lot of data , a mass of proportion operation , coordinate conversion and coordinate mapping must be dong in the plot process , it may frequently appears the phenomena of memory deficiency , graphics refurbish in low speed , graphics overlap and twinkle , so it make use of the technique of memory mapping document , memory dc plotting and local plotting twice and so on to implement quickly and top - quality plotting of lots of gigantic graphics and implement continuous and rolling display
分析人员为了方便分析,也经常需要把波形进行底图彩色填充,正级、负级填充,正负极的彩色渐变填充,并消除在填充过程中出现的毛刺现象、马赛克现象。因地震解释所涉及的数据量很大,在绘图过程中要进行大量的比例运算、坐标转换及坐标映射等,就会经常出现内存不足、图形刷新速度过慢、图形重叠和闪烁等现象,所以需要采用内存映射文件、内存dc绘图、局部重绘等技术,实现大数据量巨幅图形的快速度、高质量绘制以及图形的连续滚动显示。 |
