Tutorial Part 1

Remove Camera Shake

Remove Camera Shake Tutorial

tl;dr Version

Choose an area of the image that has a lot of edges to calculate the blur kernel. Edges at different angles work best. Trying a few different areas is usually required.

Set the Blur Analysis Regularization parameter as low as possible while still getting a clear blur kernel.

Don’t set the Deconvolution Sharpness too high on the “Faster” deconvolution method.

If you set the Blur Analysis Iterations to 10, you will get the most accurate result.

I Need Help! Version

Experiment! But remember that it is not possible to get a good result with all images.

Try many different areas as some areas will give a better blur kernel than others.

If you have a dark or noisy image, try changing the Blur Kernel Preprocessing setting.

More blur analysis iterations usually give a lower noise result.

The Higher Quality deconvolution setting is better at suppressing artefacts.

If all else fails, check the Do Aggressive Blur Kernel Analysis option.

Try manually editing the blur kernel in a photo editing application to remove noise.

The Full Version

The camera shake removal function in Astra Image has a lot of options. Why not try this tutorial to get familiar with some of them? It should only take 5 – 10 minutes to complete.

Step 1. Download the tutorial image and open it in Astra Image. You can do this in the application version of Astra Image, or in Photoshop if you are using the Photoshop plug-ins.

Step 2. Open the Remove Camera Shake tool. You can find this in the Enhance menu in Astra Image, or in the Astra Image group in the Filters menu in Photoshop.

Step 3. Drag the preview image to an area that has a lot of edges. Areas that have edges at different angles work best.

Tutorial Image 1

Step 4. On the Blur Kernel Settings tab, set:

- Blur Kernel Size: 31

- Blur Analysis Regularization: 300 (approximately)

- Blur Analysis Iterations: 5

- Blur Kernel Preprocessing: Standard

- Do Aggressive Blur Kernel Analysis: NOT checked

- Update the Blur Kernel Display While Calculating: Checked

Step 5. Now we are ready to give it a try! Click the Analyze Blur button and watch as the blur kernel is calculated. You can see the result in the Preview area. The calculated blur kernel should look something like this:

Tutorial Image 2

And the result should be something like:

Tutorial Image 3

Step 6. Not bad! But we can do better. First, set the Blur Analysis Regularization to 25. Click the Analyze Blur button again. Notice how the calculated blur kernel looks sharper? That’s a good thing. If the regularization is set too low, the blur kernel may look very noisy and / or broken into pieces. If it is set high, then the blur kernel may look “fat” and it may lack detail. Setting the regularization as low as possible while still getting a largely noise-free blur kernel is important for achieving the best results. Also, the more Blur Analysis Iterations you do, the more accurate the result.

Take care with the regularization setting. Here is an example from another image:

Tutorial Image 4

Regularization set too low.

Tutorial Image 5

Regularization set too high.

Tutorial Image 6

Regularization set about right.

Step 7. Click on the Deconvolution Settings tab and set:

- Deconvolution Method: Higher quality

- Deconvolution Noise and Artefact Suppression: Medium

- Deconvolution Sharpness: High

- Suppress Ringing Artefacts: NOT checked.

Click the Update Preview button to see the result with the new deconvolution settings.

If you select the “High” option in Deconvolution Noise and Artefact suppression, you will get less noise, but some detail may be lost. The Deconvolution Sharpness setting is also important, because it will increase detail but may also increase noise. Usually, if you select the Higher Quality setting in the Deconvolution Method, you can set the Deconvolution Noise and Artefact Suppression to “Low” or “Medium” and the Deconvolution Sharpness can be “High” or “Very High”. If you use the “Faster” deconvolution method, then you will usually need to set Deconvolution Noise and Artefact Suppression to “Medium” or “High” and the Deconvolution Sharpness to “Medium” or “High”.

Step 8: Click the OK button to apply the deblurring to the entire image.

Step 9: Good job! You completed the tutorial and you are now well on your way to removing camera shake from your own images.

Tutorial Image 7