點樣可以用photoshop整到咁樣??

圖片參考：http://i167.photobucket.com/albums/u158/Maydata/Photo/pshop-roundcorners-1.jpg

To create rounded corners, we will use the Rounded Rectangle Tool. This will allow us to specify the radius of each corner - in a consistent fashion.

Select the Rounded Rectangle Tool from the Tools:

圖片參考：http://i167.photobucket.com/albums/u158/Maydata/Photo/pshop-roundcorners-2.jpg

With the Rounded Rectangle Tool selected, use the Options menu to change the radius of the corners. You can specify any number - the smaller you go, the less noticeable your rounded corners will be.

Once the Radius is set, keep your eye on the Options menu. To the far left, you’ll see three small options that affect how your Rectangle will be drawn.

圖片參考：http://i167.photobucket.com/albums/u158/Maydata/Photo/pshop-roundcorners-3.jpg

The one we want is the first one. This one is called “Shape layers,” and it allows us to select our rectangle, later on, and include whatever is inside of it. (This should automatically be selected, by default.)

圖片參考：http://i167.photobucket.com/albums/u158/Maydata/Photo/pshop-roundcorners-4.jpg

With our Options set, draw the Rounded Rectangle on top of the artwork. Remember, everything inside the rectangle will be included.

圖片參考：http://i167.photobucket.com/albums/u158/Maydata/Photo/pshop-roundcorners-5.jpg

To get rid of the fill color, go to the Layers palette, and drag the Fill slider down to 0%.

圖片參考：http://i167.photobucket.com/albums/u158/Maydata/Photo/pshop-roundcorners-6.jpg

Now, go to the Paths palette, use the arrow in the upper right corner, and select Make Selection.

圖片參考：http://i167.photobucket.com/albums/u158/Maydata/Photo/pshop-roundcorners-7.jpg

In the Make Selection dialog box, leave the settings as is: Feather Radius at 0 pixels, Anti-aliased checked, and New Selection highlighted.

圖片參考：http://i167.photobucket.com/albums/u158/Maydata/Photo/pshop-roundcorners-8.jpg

You should notice your rounded rectangle turn into a selection.
Now, go to “Edit” > “Copy Merged,” create a New Document, and Paste what you just copied.

圖片參考：http://i167.photobucket.com/albums/u158/Maydata/Photo/pshop-roundcorners-9.jpg

You’ll notice the photograph goes right up to the border of the artwork file, which is slightly hiding the rounded corners. Simply extend the canvas size, to reveal the corners, or increase the canvas size by a few pixels before you paste your image. You can change the background color in case the photograph is blending in with the white.
http://paininthetech.com/2005/10/11/using-paths-to-create-smooth-rounded-corners-in-photoshop/

http://www.ezroundedcorners.com/ 在線 圖片圓角生成器