Apply blur or sharpen to image, excluding edges.

[josephs]

Hello,

I am overlaying a creative border to a photograph. The hole in the border is transparent so the photo remains visible. The border extends to the edge of the canvas of the photo. All is good, but there is a white edge of pixels at the inner and outer edge of the border. I'm assuming this is a result of the blur and/or sharpening to the border in areas where there is no pixel information. I have set all operations to channel rgba. Is there a way to eliminate this white edge of pixel and keep the it unaffected by the blur and/or sharpening?

Any help is appreciated!

[josephs]

Update: I was able remove the white edge of the outside border, as it was related to another issue. The white edge of pixel at inner border edge still remains.

[snibgo]

Sample images, and the exact command you used, would help us understand.

Also please say what version IM you are using, on what platform.