XianyuFFF

Testing access to Amazon Mechanical Turk... ERROR! HTTP Error 403: Forbidden

3

I create a IAM User ，but I don't know what permissions should be granted. It always shows that permissions are not granted.error like this: Testing access to Amazon Mechanical Turk......

drawpoints function question

2

您好，代码函数drawpoints()第二个参数points在使用时传递感觉存在错误，无法画出灭点，请问如何改正？

其中前四维代表了提取线段的两点坐标（x1,y1）(x2,y2)，我想请问一下第五维代表了什么意思？