In my ignorance I've been using -m TIFF_m, and then trying to "solve" the
problem of stitching the sub-images of the multipage tiff.

I literally didn't realise that -m TIFF would do the mapping and stitching
in one hit.

Even better, adding -g (use GPU) gave a COLOSSAL benefit.

My laptop has a Intel(R) Core(TM)2 Duo CPU     T5470  @ 1.60GHz, and 4Gb of
RAM (which is the most it can take).
and NVIDIA Corporation G86M [GeForce 8400M GS] (rev a1) (processor info via
lscpu, lsvga)

Output stitch is 6427x5265.

Using the CPU:
Command being timed: "nona -m JPEG -o kk hugin.pto"
User time (seconds): 167.22
Maximum resident set size (kbytes): 417236
File system inputs: 66432
File system outputs: 15752

Using the GPU:
Command being timed: "nona -g -m JPEG -o kk hugin.pto"
User time (seconds): 24.07
Maximum resident set size (kbytes): 505380
File system inputs: 4048
File system outputs: 15920

Hell yeah!


On Mon, 16 Jan 2023 at 17:58, T. Modes <[email protected]> wrote:

> [email protected] schrieb am Montag, 16. Januar 2023 um 09:52:48 UTC+1:
> I would like to "batch" the mapping and stitching. Nona can be persauded
> to do all the mapping for me, but I would like a low resource (AKA fast)
> way to do the stitching.
>
> Since the taking circumstances are very constrained, I am no concerned
> about seams or blending.
> Then take the internal blender, either by adding -m TIFF instead of -m
> TIFF_m to the command line or by setting the parameter in the pto file.
> So you save also the time for saving the intermediate files to disc and
> then read again by a second program.
>
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