Archive for post-processing

Jupiter selection & post-processing

Posted in Astrophotography with tags , , , , , , , , on 2009/08/12 by computerphysicslab

Yesterday I took several videos with Canon EOS 450d (Rebel XTi) to Jupiter through the no-EQ mounted 150mm reflector. The final effective resolution of every video is slightly different, depending on the weather conditions and the focus reached in this precise instant. So I have chosen the two best sequential videos and appended each other into one final with double frame size.

After selecting and appending, I used Photoshop to apply a hard sharpen, and several other filters getting different final results. Here they are.



Registax & post-processing

Posted in Astrophotography with tags , on 2009/08/09 by computerphysicslab

Computer assisted planetary and lunar imagery has reached the backyard amateur astronomer. With just a computer, a bunch of free software from Internet and a telescope (or even binoculars) and a point & shoot digital camera you will own the basic setup to do interesting astrophography jobs, mainly in the solar system realm.

The information obtained from a sensor device is pretty blurry, lacking of contrast and noisy as hell when shooting through a telescope or some other instrument with magnification. Atmosphere also conspire against us, because actually it is not as invisible as we thought at first. Windy nights or thermal issues may spoil our footage. That’s way disappointing. But there is a big pro when computer assisted image restoration shows up.

Here it is an example. Jupiter as recorded with a 6-inch telescope. Second step is the result of applying Registax 5 to the sequence. And step 3 is the final touch of sharp, color and contrast enhancement in Photoshop or any other similar software.