中文摘要：

探讨活体测量猪耳朵面积的测定方法.首先对27个绘制在方格纸上的不规则图形采用方格纸法和像素法进行面积测量,比较这2种方法在测量结果和测量时间上是否存在显著差异,与此同时也比较了5种不同的图像处理软件之间是否存在显著差异.然后对77头猪的右耳面积在屠宰前后分别用像素法和方格纸法进行活体和屠体测定,比较活体和屠体测量是否存在显著差异.试验结果显示,方格纸法和像素法之间没有显著差异,它们之间的相关系数大于0.995,但是方格纸法的测量时间明显高于像素法,前者平均用时约5min/头,后者平均用时均不足2 min/头.这5种图像处理软件测量的耳面积之间也没有显著差异,且它们之间的相关系数都在0.991 2以上.虽然活体测量的面积显著高于屠宰后测量的面积,但是它们之间的相关系数高达0.898 7.综合分析试验结果：在屠体测量耳面积时,像素法可以替代方格纸法,以提高测量速度.鉴于活体测量与屠宰测量之间的高相关性,可以用活体测量替换屠体测量,这不但避免了屠宰,降低了测量的成本,而且可以动态地检测耳面积随日龄的变化.另外也可为其他不规则图形面积的活体测量提供参考.

英文摘要：

The aim of this study is to find a way to scale the ear area of pigs in vivo,and to provide a reference method to measure other irregularshaped area in vivo.To compare the accuracy and time consumption of the graph paper method to the pixel method,a total of 27 irregular shapes were arbitrarily drawn on graph papers.Their areas were measured by the two methods,and the time consumption was recorded.In order to investigate the difference between in vivo and carcass measurements,the areas of the right ear of 77 pigs were scaled in vivo and in vitro with the pixel and the graph paper methods,respectively.The results showed that there was no significant difference in the ear areas measured wigh the graph paper and the pixel methods,and the correlation coefficients between them were greater than 0.995.However,the time consumption of the graph paper method was significantly larger than that of the pixel method.The former took about 5 minutes to scale an ear,and the latter took 2 minutes.The ear areas also had no significant differences among the five image processing software measurements,and the correlation coefficients among them were larger than 0.991 2.Although the ear areas measured in vivo were significantly huger than those measured in vitro,the correlation coefficient between them was as high as 0.898 7.So it can be concluded that the pixel method can replace the graph paper method to improve measurement speed when the ear area is scaled in vitro.Given the high correlation of ear areas between in vivo and in vitro,the in vivo measurement can displace the carcass measurement to not only avoid the slaughter and reduce the cost,but also dynamically supervise the ear area changes with growth.