Simple Sharpen

They are two different tools to enhance the image.

Simple sharpen can improve the contrast between pixel and pixel, and Edge thrink can make the edge more acuminate.

Enter the function:

Select 'Sharpen - ...' from popup menu of 'Enhancement' button.

The description:

Figure 1 is the nor more edge before processing. Figure 2 is after simple sharpen, the contrast between pixels is improved. Figure 3 is after edge thrink.

The following pictures compare these 2 effects.