Chromatic Aberration Removal

Sometimes Chromatic Aberration is noticeable on an image and a technique is needed for Chromatic Aberration Removal.  You may be asking what is Chromatic Aberration, so let me explain.  It is often found in images where there is an extreme contrast between the light and dark colors and/or highlight and shadows. The dynamic range and sensors on most cameras  just cannot record the two extremes, thus purple fringing occurs or sometime it comes in the form of green or red contamination on the darker color.

Here is a great technique I stumbled upon today to remove Chromatic Aberration using Photoshop CS5.

Here is one method for removing chromatic aberration:

1) Open the image in Photoshop CS5 and copy the Background Layer (CMD-J).

2)  Go to Filter > Blur > Gaussian Blur.  You can experiment with the amount of pixels here, but I had good luck using 15 pixels.

3)  Change the Blend Mode on the Layer to Color.

4)  Add a Mask to the Layer and then invert the Mask.  (CMD-I)

5) Paint with White to areas where you want to remove the CA. If you apply too much, change to Black and paint to remove.  Also, using the Opacity slider on the brush will help  control the intensity of the filter.

I also read  Lightroom 4 has a great tool to remove CA. I guess I will put that piece of software on my Wish List.

The more I learn about photography,  Photoshop and art the more I find I need and want to learn.

Happy Post Processing!

Visit my website, Susan McAnany Photograpy, to view my work.

Just a quick update to this post. I have used this technique also with Photoshop CS6.

 


Painting With Light Technique

Painting with light is one technique I really enjoy experimenting with. I think I like it so much because I never know exactly what I am going to get. There is definitely a surprise element when you try the technique of painting with light. If you have been following my post, I’m sure you’ve noticed I am always searching for the unusual and like to experiment.

I have been doing some research on the Painting with Light technique and wanted to share my findings and first efforts. The image below was taken in a harbor on Sarasota Bay with the Ringling Bridge in the background on the right.  The mechanics of the process is to place the camera on a tripod and using a slow shutter speed rotate the camera either left and right or up and down. For the image above, I obviously rotated the camera laterally.  The exposure was 1 second at f/22; ISO 100. I was shooting at sunset, which required me to really stop down the aperture. I was wishing my ISO would go to 50, but no such luck just yet with most digital cameras. There is definitely some experimentation required with the shutter speed and this process can be done with speeds as fast as 1/15 of a second. As always, lighting rules and shoot many frames.

“Ringling Bridge” Painting with Light

paint with light technique
Abstract of Ringling Bridge and Sarasota Bay.

View more of my work at www.susanmcanany.com.

Thanks for reading!