using imtool and imcontrast functions

Hi,
I am trying to change the contrast of a jpg image. I tried using imtool function after reading the image by typing J = imtool(I). Although I managed to open image (I) on imtool but the contrast taps were not activated for some reason. I also tried using imcontrast and hist functions but with no success. Would some please advice regarding this?
Azzar

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此问题已关闭。

提问:

2015-9-25

关闭:

2021-8-20

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