Example 2: Cropping With Offsets


This example uses a different source video and aims to crop the frames so that two of Jupiter's moons remain in each frame.

This is the source video showing Europa, Jupiter and Io.


This video is from an Imaging Source DFK 21AU618.AS camera.  It is a monochrome video that needs to be debayered to convert it to colour.
This is a different source video from the previous examples and requires an offset when it is cropped if both moons are to be kept in the image.

As usual we start with the 'Source Files' tab, adding the video file to the source file list:


Notice that this file has 6288 frames in it, many more than the previous examples.

Before selecting any options we click the 'Test Options' button to bring up the first frame of the source file in PIPP's image preview window to help with deciding on the crop values:


Next we select the check box to Optimise Options for Planetary imaging:


Moving onto the processing options tab we see the default planetary options have been selected:


However, from the image preview window earlier we can see that the standard 450x450 pixel crop does not suit our needs for this capture.  So we modify the width and height of the crop to something more suitable:


We click the 'Test Options' button again to check the new crop options:


The size of the crop is about correct but the image needs to be shifted to the left.  So lets try putting a -50 pixel shift in the X Offset box:


Again we click the 'Test Options' button again to check the new options:


Whoops!  The planet has moved the wrong way.

We need to shift the planet the other way so we change the X Offset from -50 to +50 pixels:


Yet again we click the 'Test Options' button again to check the new options:


That is looking much better, but I think it can do with a little nudge further to the left.

So we increase the X Offset from 50 to 60 pixels:


And surprise, surprise, we click the 'Test Options' button again to check the updated options:


Bingo, that is close enough!  That is the crop options sorted, but the image still needs to be debayered.

On the 'Input Options' tab we select the correct debayer pattern for the camera:


For one last time we click the 'Test Options' button again to check the updated options:


The image is now suitably framed and debayered.

Next we need to enable the quality sorting.  So we move to the 'Quality Options' tab, enable quality estimation and change the number of frames to keep to 1500:


Next we move onto the 'Output Options' tab:


The options on the 'Output Options' tab do not need changing.

So we move onto the 'Do Processing' tab and click the 'Start Processing' button to start the processing run:


The processing run to completion:


Examining the summary we notice that although the number of input frames was originally reported as 6288 frames, the file actually contained 6000 frames.  It is actually very common for AVI files to claim to have more frames than they actually contain,  this is not a problem.

With the processing complete PIPP opens the output directory in a Windows Explorer window:


This is the AVI video that PIPP generated:


This video contains the best quality 1500 frames from the source video, sorted into quality order.

After a quick stack of this generated AVI file with Registax 6 and a little post processing the final image looks something like this: