Sharpening in Photoshop Part Four
Using an edge mask to sharpen images in Photoshop is handy to sharpen around edges, particularly where detail is required such as rugged landscapes or nature portraits. The picture below will be used to sharpen around edges to give a cleaner finish.
Create a Mask for Edge Mask Sharpening.
With the image opened up in Photoshop, switch over to the channels list then select a channel with the most amount of contrast.
Next is to duplicate this channel.
Creating Edge Mask
Working with the duplicate mask, create an edge mask to be used for sharpening. First, we need to Photoshop to find edges by using Filter > Stylize > Find Edges.
So far so good, I now have a lovely image that shows edges ready for sharpening. But it’s not finished yet as we need to thicken the edges. To do this select Filter > Other > Maximum.
What I do next is select Median in Filters. Go to Filters > Noise > Median.
Next is to set adjustments levels. Go to Image > Adjustments >Levels. What we are doing here is getting rid of any random pixels from our image by setting a high black point.
Next, we need to create a Gaussian Blur. Go to Filter > Blur > Gaussian Blur. What I am achieving here is to feather edges on my mask.
Creating Edge Mask Selection
At this point create an edge mask from this selection to use on the image in the layers panel. To do this, hold down the control key, then click on your duplicate channel to create an edge mask.
Furthermore go back to the layer tab and go to Select > Inverse. Then go to Filter > Sharpen > Unsharp Mask and apply your changes. Click ok when happy.
Then go back to your channels tab and select all RGB channels. Finally, deselect your copied channel.
- High Pass Filter to Sharpen an Image in Photoshop – Sharpening in Photoshop Part One
- Smart Sharp in Photoshop to Sharpen an Image – Sharpening in Photoshop Part Two
- Unsharp Mask in Photoshop to Sharpen an Image – Sharpening in Photoshop Part Three
- Other Ways to Sharpen an Image in Photoshop – Sharpening in Photoshop Part Five