- (
`wdg3`) The original image.

- (
`wdg3hst1`) Intensity histogram of

`wdg3`.- (
`wdg3thr1`) Result of thresholding

`wdg3`at a pixel value of 80.- (
`wdg3thr2`) Result of thresholding

`wdg3`at a pixel value of 120.- (
`wdg3adp1`) Result of adaptive thresholding

`wdg3`using the*mean-C*as a local threshold, where C = 4 and the neighborhood size is 7×7.- (
`wdg3adp2`) Result of adaptive thresholding

`wdg3`using the*mean-C*as a local threshold, where C = 8 and the neighborhood size is 140×140.