Cant Align subs of different focal lengths

[rdryfoos]

Well I tried and it was not as easy as everyone said.  I have subs from a C11 Edge at 1960 and a TVnp101 at 540--they are Ha subs and are all calibrated and Cosmetically corrected.  They produced very decent Ha stacks in their respective focal lengths.  But PI will not align them.  I used the longer focal length as the reference image as someone here suggested.  I used defualt settings, then many combinations of as many different settings as I could before I got fed up.  How is this done?  What are the proper settings? 

Thanks
Rodd

[rdryfoos]

Here are examples of the subs I am trying to align.  I have 20 to 30 of each.  Same camera.  JPEG compression was high due to the ridiculously low file size restrictions, so hopefully the images are presentable.  These are raw subs--calibrated but with additional processing.

[Juan Conejero]

I have been able to register these JPEGs perfectly, by just defining a preview on the wide field image, covering roughly the area around the bubble nebula. So file size restrictions don't seem so bad, after all...

[rdryfoos]

And I can't use dynamic alignment because no one has told me how to avoid memory read errors when I use dynamic processes--I have an SSD hard drive, and Core i7 with 16gb ram....come on now.  PI remains 60% usable for me, and I certainly can't figure out what the problem is......Hint....hint....hint

[rdryfoos]

And I can't use dynamic alignment because no one has told me how to avoid memory read errors when I use dynamic processes--I have an SSD hard drive, and Core i7 with 16gb ram....come on now.  PI remains 60% usable for me, and I certainly can't figure out what the problem is......Hint....hint....hint

  Yes but I have 40 subs to register--do I have to define a preview on all of them?  I thought that the long focal length image was the reference image?

[rdryfoos]

I have been able to register these JPEGs perfectly, by just defining a preview on the wide field image, covering roughly the area around the bubble nebula. So file size restrictions don't seem so bad, after all...

  Yes but I have 40 subs to register  20 of the widefioeld and 20 of the long FL--do I have to define a preview on all of them?  I thought the long FL was the reference image?

[rdryfoos]

I have been able to register these JPEGs perfectly, by just defining a preview on the wide field image, covering roughly the area around the bubble nebula. So file size restrictions don't seem so bad, after all...

  Obviously there is more to it--I tried defining a preview and the resultant imageafter integration  has a white square where the preview is.  I find no documentation for how to do this anywhere.

[Juan Conejero]

The reference image has to be the wide field one. That is, you want the narrow field image registered over the wide field. Otherwise registering these images makes no sense IMO.

No, you don't have to register 40 images manually:

1. Select one of the wide field images as your reference image. Call it R.

2. Register all wide field images against R. This can be done in a single StarAlignment instance, by selecting the corresponding reference and target files.

3. Open R in PI and define a preview covering roughly the area around the bubble nebula.

4. Reset StarAlignment, set Maximum stars to 200 (Star Matching section), and select R as the reference view.

5. Register all narrow field images against R. Again, this is a single StarAlignment instance.

Let me know if it works.

[rdryfoos]

The reference image has to be the wide field one. That is, you want the narrow field image registered over the wide field. Otherwise registering these images makes no sense IMO.

No, you don't have to register 40 images manually:

1. Select one of the wide field images as your reference image. Call it R.

2. Register all wide field images against R. This can be done in a single StarAlignment instance, by selecting the corresponding reference and target files.

3. Open R in PI and define a preview covering roughly the area around the bubble nebula.

4. Reset StarAlignment, set Maximum stars to 200 (Star Matching section), and select R as the reference view.

5. Register all narrow field images against R. Again, this is a single StarAlignment instance.

Let me know if it works.

  I'll give it a shot--thanks--will atke 10 min or so

[rdryfoos]

The reference image has to be the wide field one. That is, you want the narrow field image registered over the wide field. Otherwise registering these images makes no sense IMO.

No, you don't have to register 40 images manually:

1. Select one of the wide field images as your reference image. Call it R.

2. Register all wide field images against R. This can be done in a single StarAlignment instance, by selecting the corresponding reference and target files.

3. Open R in PI and define a preview covering roughly the area around the bubble nebula.

4. Reset StarAlignment, set Maximum stars to 200 (Star Matching section), and select R as the reference view.

5. Register all narrow field images against R. Again, this is a single StarAlignment instance.

Let me know if it works.

  No...it did not work--alignment went well, but when I tried integration, it was a disaster.  The preview was a white square and there was no matching of any stars.

[rdryfoos]

When I try integrating the separate scales separately--the long focal length aligned subs are mostly black with a square the size of the rpeview with the bubble.  When I try to integrate them with any rejection--the square is white.  If I use no rejection, it integrates but the images in the rpeview are not properly aligned.

[rdryfoos]

uh....Hello?  I've tried a bunch more things.  Can't get it to Integrate the images.  Registration is not worth much without integration.