我觉得你可以看一下这篇文章,“Towards Practical Facial Feature Detection”,
有关样本数及区域选择等因素进行了非常深入的研究分析,而且是07年的文章,也算比较新吧。其中提到:
We investigated the effects of the training set on performance. The number of
positive examples was varied from 100, to 20000 according to the following schedule :
{100; 300; 500; 1000; 2000; 3000; 5000; 8000; 10000; 15000; 20000}. For each condition the number of negative examples was 3 times the number of positive examples.
另外,不知可否将你的训练样本及描述文件(info等)发一份给我?sweetjujube@sina.com