
This creates a smooth transition between the selection and its surroundings.0 (a poetic approach to debugging) Still, some very cool improvements are also available: Improved Curves tool. The gimp has a built in way to make round edges when selecting a rectangle.Open the “Filters” menu at the top of the screen and select the “Blur” category. Click the "File" menu at the top of the main window, select "Open" and double-click the image that you want to apply a smoothing filter on. Select Select> Featherand keep the default pixel setting of 5px to make the edges of the selection more smooth. This means the method above fades the boundaries of the layers to the background but not to each. Smoothing Edges With Filters This is the fastest option, and it works best on simple graphics that have rough edges from having a crude selection applied to them, although it’s not a miracle solution.The tool has a lot of useful settings built in, like having the ability to create rectangular selections with rounded corners, feathered edges, and even with guide lines for more precision. In the Edge Detect dialog box, select a parameter value of the appropriate size for the edges in your image. The Foreground Select Tool lets you color in 3 different regions (Background, Foreground, and Unknown), then automatically creates a selection for you around the edges of your object.* Supports all 4 selection modes * Supports anti aliasing for removing jagged edges on curves * Supports feathering edges Fuzzy Select Tool (U) The either bring it into Inkscape at the highest resolution you have for the image and Object>Bitmap trace it. Select the background of this combined layer. In GIMP we can use Rectangle Select tool to select a four sided rectangular area of the current layer. Cut it out using a program such as GIMP into its own separate image.Now that you have an image to work with, you’ll convert that image to a rounded rectangle with Gimp, where the edges of the rectangle will be transparent: Add transparency to the image.Go to Colors –> Invert and suddenly everything is really soft and smooth: At this point you can play with the opacity of High Pass layer to adjust the intensity of the effect.Even if the edge is only a few pixels it will be easier on the eye. To start to do this right mouse button (RMB) click on the image or click on the drop down menu at the top of the page the follow text options. Now copy and paste the selection into a new layer and hide the original layer. In the sharpen tool, the Anti-aliasing is also removed.

Once you have a good mask, blur its edges slightly by choosing Filter > Blur > Gaussian Blur and apply a 1 or 2 pixel blur to it.
