Stitching works but crops half of the result

[Bruce James]

I am using ASTAP to stitch two images, each of size 2088x1536 (WxH), and one of which is positioned roughly directly below the other with about a 100-to-200-pixel overlap. The stitching completes okay, but the resulting image is 1052x3981 (WxH). So about half of the width is cropped, and there is a large amount of extra blank height added.

This is the third time I’ve used ASTAP to do stitching. My first attempt of three, horizontally overlapping images worked flawlessly. My second attempt of two vertically overlapping images (as per my third attempt) produced the same issue as my third attempt. But in this case, I found if I rotated the two images 90 degrees, I successfully avoided the cropping issue. In my third attempt, I also attempted rotating the images but sadly with no success.

Any ideas?

Images and log available here:
https://1drv.ms/f/s!AusCW7ZHj0kNjOp7s6mYdJApMvfWWQ?e=gbgRHn

[han.k]

Fixed in version 2024.03.13.

I have some problem in uploading to SourceForge. Download the development version from here:

http://www.hnsky.org/astap#beta_version

Cheers, Han

[Bruce James]

Thanks Han, works perfectly now!

[han.k]

Note that the original image have one or two black lines around it so you have to set the ASTAP crop at 1%.

[Bruce James]

Yes, got it thanks!

[riichard robert oneill]

can anyone suggest a youtube (or similar) tutorial regarding stitching in ASTAP

[han.k]

Richard,

There is no Youtube for stitching. If it doesn't work just ask for assistance.

Han

[riichard robert oneill]

Hello Han, thanks for the reply. i have just attempted my first stitch (3x2, so 6 images, all of the same size and all OSC, asi2600mc-pro) i stacked in ASTAP and they look great. i then used GraXpert to do background and noise reduction. then imported back into ASTAP to attempt stitching. I followed the suggested work method in the "manual". i select image stitching mode in the stack tab i tried both astrometric alignment and star alignment but neither work. when i use star alignment the process begins and then it adds file 1-6 and then 2-6. after adding file 2-6 the program just sits. i waited 8 minutes and still a "spinning wheel".
i apologize for being "slow" and feel this is "user error" but need some detailed "step by step" instructions as i feel i am missing something

thank you for your patience
richard