- (
`son1`) The original image.

- (
`son1thr1`) Result of thresholding

`son1`at a pixel value of 128.- (
`son1sub1`) Result of pixel subtracting

`son2`from`son1`and adding an offset of*100*.- (
`son1sub2`) Result of pixel subtracting

`son2`from`son1`using wrapping.- (
`son1sub3`) Result of pixel subtracting

`son2`from`son1`using absolute difference.- (
`son1sub4`) Result of applying gamma correction to

`son1sub3`.- (
`son1thr3`) Result of thresholding

`son1sub1`at a pixel value of 80.- (
`son1div1`) Result of pixel dividing

`son1`by`son2`.- (
`son1thr2`) Result of thresholding

`son1div1`at a pixel value of 160.- (
`son1adp1`) Result of adaptive thresholding

`son1`using the*mean*of a 7×7 neighborhood.- (
`son1adp2`) Result of adaptive thresholding

`son1`using the*mean-C*as a local threshold, where C = 7 and the neighborhood size is 7×7.- (
`son1adp3`) Result of adaptive thresholding

`son1`using the*mean-C*as a local threshold, where C = 10 and the neighborhood size is 75×75.- (
`son1adp4`) Result of adaptive thresholding

`son1`using the*median-C*as a local threshold, where C = 4 and the neighborhood size is 7×7.