AstroEdit App

071126 I manage to get the stacking right now. 10 frames for 160 seconds. I am using search radius 48. think will reduce to 40 seconds when I used 0.25 size. 1. The micro shift is max about 36 and 44 pixel. so I have to use 48 as search radius. 2. The reserve mapping is used. it prevent black hole due to float offset. Some integer pixel may not get a color. To do reserve mapping, imagine a moon at x=100 in best frame. It has drift to x=130 at next frame. To start, we use the best frame coordinate, and loop through the pixel. the moon at x= 100, need to add 30 to get x=130 in the next frame. So the shift is next.x - best.x, or  -> shiftX = next.x - best.x.  And for shiftY = next.y - best.y. Since the frame center is tracked using Vision, it is bottom left coord for the frame center. To change to top left, we use next.y(top left) = 1-next.y.  shiftY = next.y - best.y shiftY = (1-next.y) - (1-best.y) -> shiftY = best.y - next.y  3. The coord top left applies to pl...