论文部分内容阅读
目前使用图象分析仪,测量椭圆的长短半轴,是用Feret(弗理)径,0°、45°、90°、135°四个固定方位上来测量。若被测物不在这四个方位上,则误差较大,除非人为地把每个被测物,正好放在这四个方位上来测量,这种测试方法速度太慢。通过微机控制图象分析仪,可以自动地测出任一方位上的被测物的面积和周长,同时很快地得到这个被测物椭圆的长短半轴,对测量生物细胞和射线微孔滤膜孔径等比较有效。一椭圆周长的计算设椭圆的长半轴为α,短半轴为b,其椭圆方程为
Currently, the image analyzer is used to measure the length and the length of the semi-major axis of the ellipse, measured by four fixed orientations of 0, 45, 90, and 135 degrees using a Feret diameter. If the measured object is not in the four directions, then the error is larger, unless the artificially measured each object, just on these four directions to measure, this test method is too slow. Computer controlled image analyzer can automatically measure the area and perimeter of the measured object in any direction, and at the same time quickly obtain the semi-major axis of the measured object ellipse. The measuring biological cells and the ray micro-pore filter Film aperture more effective. The calculation of an elliptical circumference Let the long axis of the ellipse be α, the short axis of the ellipse be b, the elliptic equation is