[Insight-users] Funny results from ImageRegionConstIterator.

[johnjtchen at aol.co.uk]

Hi Guys,

Environment: vista, vs2k5sp1, itk3.4.
Input mPreMaskImg  image: 256 256 50 with 2000 points of intensity 255, 
background intensity is 0.
Following codes generates funny results:
--------------------------------------------------------------------------------------
    typedef itk::ImageRegionConstIterator <FloatImageType> constIterType;
    constIterType itSeedsMAsk(mPreMaskImg , 
mPreMaskImg->GetBufferedRegion());

    float countfordebug = 0;
    float smallerthanfa = 0;
    itSeedsMAsk.GoToBegin();
    while (!itSeedsMAsk.IsAtEnd()) {
        if (itSeedsMAsk.Get() > 0){
            ++countfordebug;
//             if (mFAImg->GetPixel(itSeedsMAsk.GetIndex()) < mFAThreshold){
//                 ++smallerthanfa;
//                 break;
//             }
        }
        ++itSeedsMAsk;
    }
    pDoc->mOutputText << "countfordebug1 : " << countfordebug << std::endl;
    pDoc->mOutputText << "smallerthanfa1 : " << smallerthanfa << std::endl;

******** results ********
countfordebug1 : 2000
smallerthanfa1 : 0
--------------------------------------------------------------------------------------
    float countfordebug = 0;
    float smallerthanfa = 0;
    itSeedsMAsk.GoToBegin();
    while (!itSeedsMAsk.IsAtEnd()) {
        if (itSeedsMAsk.Get() > 0){
            ++countfordebug;
            if (mFAImg->GetPixel(itSeedsMAsk.GetIndex()) < mFAThreshold){
                ++smallerthanfa;
                break;
            }
        }
        ++itSeedsMAsk;
    }
    pDoc->mOutputText << "countfordebug1 : " << countfordebug << std::endl;
    pDoc->mOutputText << "smallerthanfa1 : " << smallerthanfa << std::endl;

******** results ********
countfordebug1 : 48
smallerthanfa1 : 1
--------------------------------------------------------------------------------------
Has anyone experienced the same problem?
Did I do something wrong?
Or just I was crazy? Which it does make me went like that.....

Thanks.