Add RadioButton that can change different mode
1.One mode is segmentation mode that can segment the region
2.Another mode is similarity mode that can measure the similarity between the result and the ground truth image
Add button that can load the ground truth image by user
When the program loads the ground truth image, it will count the area of region and the number of contour.
Add two Label that can show the numbers of MAD and DSC
Let the interface be more friendly and prevent from notorious input by user