In laser scanning confocal microscopy imaging

CT imaging

MRI imaging

and in 3D image processing and recognition

visualization of 3D objects is essential. Nowadays

the popular ISO surface visualization is based on 3D virtual object reconstruction. The 3D virtual object reconstruction can be volume based. It can also be 2D slice based. In the 2D slice based

due to the still existing problems

such as contour pairing

surface diverging

contour pair patching

etc

a few new methods are proposed for the problem solving. In theses methods

the contour paring is carried out with OR and AND operations. For two contours

if the results of the OR and AND operations satisfy a pre set criterion

the two contours are a pair. The surface diverging is decomposed with mathematical morphology. The boundaries generated by the morphologic operation are that of the diverging surfaces. The contour pair is patched with triangles to form the ISO surface after the pair is polygonized. The triangles are constructed under the criterion of minimum contour linking edge. With the methods

some experiments have been done. The experimental results showed that the theories of the methods coincide perfectly with the practice. The advantages of the methods are simple programming and fast computation.