HQ-cam noisy DNGs

[steve1000]

Hi,

I am still experimenting with the hq cam and raw images via PyDNG.

JPGs look fine - which I guess is the result of internal noise reduction.

The images are taken with in a dark room with a roughly synchronised strobe light via a subprocess call of raspistill.

Does anyone have a tip how to minimise image noise?

[topguy]

The point of using RAW images is so you can have better options when processing the images in programs like RawTherapee etc.. ? You are supposed to postprocess them which include finetuning the noise-suppression.

Other tip:
Don't take pictures in a dark room

[steve1000]

Thanks for the reply!
I’m aware how raw works, but thought there might be a calibration or filter option that could be used.

[Jack Hogan]

Does anyone have a tip how to minimise image noise?

If you can, increase strobe power

[steve1000]

Thanks!

I’m already minimaxing focus, exposure and strobe intensity... what have you.

My “fixed” measurements so far:

Optimal aperture is roughly between f5.6 an f8

The shortest capture time I can reliably manage over all 12 cams used is 1/4s
(Trigger, delay x, flash)
I can indeed reduce noise via adobe raw, and all the images are - given they come out of a raspberry- very good.

I was just wondering, if I could spare myself some time and calibrate the raw profile or apply a filter at the pi level