The Use Of The History Brush With The Unsharp Mask Using Adobe Photoshop USM
Photography and Text By Philip Tulin © All rights reserved.

Rose Digital Photography © Outdoor Eyes
Before
Rose Digital Photography © Outdoor Eyes
After

Sometimes you only want to sharpen or blur only a small section of the photograph. When you apply the blur or unsharp mask, they apply the same amount to each and every pixel to your photograph. When you need to blur or sharpen only a small section of a photograph, that is when the history brush becomes a very useful tool. The instructions below are for the unsharp mask. A blur can be substituted using the same steps explained below. The photographs above show a sharpened center of a rose. The rest of the photograph has remained the same.


How To Apply An Unsharp Mask To A Section Of Your Photograph

Note: The history brush will not work properly if the photograph is resampled or the image size has been changed. The snapshots that are indicated below are not saved when the finished photograph is saved.
 
1. Open the file. Choose File --> Open --> Enter the image name to be fixed.
2. Hold the Ctrl Key down and hit the + key a few times to zoom the image to 100%.
3. Choose Filter --> Sharpen --> Unsharp Mask. Enter the following parameters: Amount to 100%, the Radius to 1 pixel and the Threshold to 1. You can change these numbers based the needs of your photograph. Click OK. The history screen will display the unsharp mask as indicated in the image below (A).
Amount: The percentage of sharpening that will be done to the edges of the image.
Radius: The number of pixels in from the color edge that will have pixels sharpened. The higher the number of the radius, the thicker the color edge will be.
Threshold: How different the color shifts in the pixels have to be before the filter sharpens them.
Hint: It is better to unsharp at lower numbers twice than to unsharp at higher numbers once. Always do unsharp last in the digital editing process.

History Screen

4. Click the camera located on the bottom of the history screen (B). A snapshot of the photography will appear named as Snapshot 1 (B).

Snapshot Screen

5. Select the history brush from the tool box and choose the brush size needed.
6. Click the box on the left side of Snapshot 1 (C). Click open on the history screen and the word open will be highlighted in blue (D).
7. Slowly paint with the history brush the area that you want to appear with the unsharp mask.
8. You can add additional snapshots at any time if your image needs additional editing.
9. Save the image.




My Outdoor Eyes Photography Blog

Pretty White Watercress At Fort Hill On Cape Cod

There is a lot of Watercress wildflowers starting to bloom along the trails at Fort Hill, especially down by the water.  Watercress have tiny white flowers with 4 petals. They are so delicate and pretty. Have you ever seen a Watercress wildflower?

Red-Winged Blackbird At Fort Hill On Cape Cod

You can always hear the distinct “Cu-ca-ree” call of the Red-Winged Blackbird as you hike around Fort Hill. They are everywhere and so pretty. This guy was high in the Eastern Cedar tree along Nauset Marsh just singing away. Love his coloring… so bright and vibrant!

Pretty Purple Ground Ivy Along The Trails At Fort Hill On Cape Cod

Ground Ivy is part of the mint family and grows to about 6″ tall with 3/4″ blue-violet flowers which are tubular. They grow from April to June and you can see them all along the trails at Fort Hill in Eastham.


 
Photography Outdoor Adventure Outdoor Eyes Crafts 7522 Radio Home

© 2000-2018 ImageNNetwork  All rights reserved.