* Image.H

^ Image.H      ^ INVT       ^NRT         ^
| Get Image width    | img.getWidth()     | img.width()        |
| Get Image height   | img.getHeight()     | img.height()        |
| int/float img      | Image<float> | Image<PixGray<float> >|
| get value (x,y)    | img.getVal(x,y) | img.at(x,y)|
| set value (x,y)    | img.setVal(x,y,value) | img(x,y) = value|
| get value from float img    | img.getVal(x,y) | img.at(x,y).val()|
| Create Image    | Image<float> img(w,h,NO_INIT)| Image<PixGray<float> >(w,h,ImageInitPolicy::None)|
| Check initialized    | img.initialized()| img.size()>0|
| Get Writeable iterator    | img.beginw()| img.begin()|
| Get Read-Only iterator    | img.begin()| img.const_begin()|
  * Point.H
^ Point.H      ^ INVT       ^NRT         ^
| Get X,y    | point.i,point.j| point.x(),point.y()|