软件主体 meaning in English

software agent

Researches on how to develop all digital photogrammetry sof tware based on general digital camera . and a mathematical model for softwares t wo main parts , direct linear transform ation and least squares image matching , is given , a physical model for examining the softwares entire performance is also given . the results of numerical imitation and physical models calculation show that the software development a nd research in the above two parts are successful
给出了普通数码相机数字摄影测量软件主体部分的开发思路，对软件中的两大主要部分? ?直接线性变换与影像匹配两部分分别给出了数学模型，为检验软件的整体性能，又给出了一个物理模型.通过数值模拟及物理模型的计算结果，表明软件在以上两部分的开发研究是成功的