[Insight-users] how to use operator+=(OffsetType)?

[Raquel Itk]

Hi,
I have an iterator and I want to increment it by a specific value because I
wan to know only the values of the pixel in the diagonal of an DICOM image.
I want to use *operator*+=(*OffsetType*) but I don't know how I should do.
My image is 512x512 so I would like an offset of 512.
Than you in advance
Ra
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