otsu Gray-level image segmentation using otsu s method.
Iseg = otsu(I,n) computes a segmented image (Iseg) containing n classes
by means of otsu s n-thresholding method (otsu N, A Threshold Selection
Method from Gray-Level Histograms, IEEE Trans. Syst. Man Cybern.
9:62-66 1979). Thresholds are computed to maximize a separability
criterion of the resultant classes in gray levels.
otsu(I) is equivalent to otsu(I,2). By default, n=2 and the
corresponding Iseg is therefore a binary image. The pixel values for
Iseg are [0 1] if n=2, [0 0.5 1] if n=3, [0 0.333 0.666 1] if n=4, ...
[Iseg,sep] = otsu(I,n) returns the value (sep) of the separability
criterion within the range [0 1]. Zero is obtained only with images
having less than n gray level, whereas one (optimal value) is obtained
only with n-valued images.
標簽：
otsu
segmentation
Gray-level
segmented
上傳時間：
2017-04-24
上傳用戶：yuzsu
