(click on the thumbnails to see the full picture)
Moon straight wall
Left picture: shows how 60 video frames look when combined and aligned.
Right picture: shows what unsharp masking and deconvolution can do.
Left picture: from one of the original video frames.
Middle picture: compiled from a few video frames aligned by hand.
Right picture: shows how combining almost 200 video frames now reveals a hint of the Cassini division.
(all pictures where resized to give them the same size)
Saturn is a difficult object, because the video module works at the limit of its sensitivity, leaving the video recordings with a lot of noise.
Mars (15 April 1997)
This shows you the effect of enlarging (or resizing) before aligning pictures
Left picture shows Mars taken from a video, aligned and combined with AstroStack, then enlarged 3 times with a graphics program.
Right picture shows Mars taken from the same video, enlarged (resized) 3 times, aligned and combined all within AstroStack.
You see that resizing in the very beginning (i.e. the preview stage) gives potentially more detail or a more appealing picture.
This example shows the benefit in having a moving object, instead of holding it deadstill.
Left picture: Object held still in front of a video camera. Enlarged 2 times, auto aligned and combined pictures, then using unsharp mask to show details.
Right picture: Object handheld, moving slightly, in front of a video camera. Same procedure.
This example shows the capabilities of a flatfield for removing spots and irregularities on the camera screen. It was shot with a second hand video camera
equipped with an image intensifier tube, showing blobs and smears probably because of ageing.
Left picture: the result from the original video, not much to look at.
Middle picture: the flatfield, produced by holding a white piece of paper in front of the camera, keeping everything else the same.
Right picture: the original video which resulted in the left picture, now corrected with the flatfield. This isn't perfection, but without flatfield it is quite useless.