Performance on large images - how to (radically) improve?

[pgaston]

This works great! Thanks! However...
I'm moving to high-resolution images (in order to take one image and cover a wider field of view, i.e., capture barcodes from a large face.) I'm moving to a 64MP sensor. However, the time to decode a 16MP image is roughly 1.8 seconds (on my target hardware of a Raspberry Pi 4B w/ 8GB of memory.) Assuming linear performance (which may be wrong) it will take over 6 seconds to process a 64MP image. This is too long.

Ideas?

• algorithmic? e.g., reduce the initial scanning to look at, say every 4 or 8 lines?
• openCL?
• external hardware? e.g., a Coral USB accelerator?

Thanks!
p