Nan value in Remote Sensing Image Processing

Source: http://blog.csdn.net/kupe87826/article/details/8306780

 

Reference: http://stackoverflow.com/questions/4744437/testing-if-float-value-is-nan

Http://stackoverflow.com/questions/570669/checking-if-a-double-or-float-is-nan-in-c

Environment: vs2010, system win7

During remote sensing image processing, the returned value is 1 .. # ind000000000000, Which is confused. I checked the Nan value on the Internet, which is inconsistent with the storage format of floating point numbers, so I cannot read the value.

Solution:

1,

If (X! =X){//
X is Nan} (This has not been tested. You can try it)

2,

Use the _ isnan () function provided by VC (this should be okay)

 

3,

But how does one implement cross-platform? I think there should be boost!

# Include <boost/Math/special_functions/fpclassify. HPP>

If (boost: Math: isnan) (xval ))

{

// X is Nan

}