contour - Image segmentation in presence of noisy background -

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attached image in bright white contour near green 1 contour of interest. green 1 approximate automatic initialization. gradient non existent in region near automatically initialized contour. hence, active contours , other gradient based methods fail without moving bit.

along normal of initialized contour, searched maximum intensities (and reasonably close initialized contour). deleted outliers , smoothed detected curve detect smooth curve. there issues this. if can suggest different, if useful.

enter image description here

the gradient non existent in region near automatically initialized contour. hence, active contours , other gradient based methods fail without moving bit.

use gradient vector flow* external force function on active contours. uses diffusion process extend influence of high-gradient pixels. right parameters, work on shown initial curve.

*if link ever dies, search snakes, shapes, , gradient vector flow chenyang xu , jerry l. prince.


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