RPP 64 converter

[GeneHack]

here´s another RAW for download.

https://wetransfer.com/downloads/19...N_TDL_01&utm_medium=email&utm_source=sendgrid



all sliders are in SPP at ZERO.

This is the reference, which is simply unachievable for me in RTT. Why?

 

[Iliah Borg]

White balance all that shows is auto or custom.

Please shoot with your camera set at each available in-camera WB preset separately, making a note of WB setting for each shot; same subject and same light is OK, and make the raw files available. We will study the files and try to add WB tables to RPP.

Zero for all channels does not look green like Nikon etc files.

That's because of the difference between Bayer and layered (Foveon-type) spectrum separations.

Also with Nikon files or others you have many white balance options as shot and many K temp white balance. These do not show with sigma files. Zooming in with the sigma file I saw a few white dots. In my case the dot remove tool worked and removed them. Maybe beta37 is a work in progress or maybe it is how sigma files are converted with it. Any questions need to be posted on the google support forum to get to the developer or experienced users.

DA

--
http://www.libraw.org/

 

[Iliah Borg]

thanks Iliah will do.

Thank you for the files. The dots are so-called hot pixels, and the number grows with the duration of exposure. What Sigma are doing is replacing the hot pixel value with the value of a neighboring non-hot pixel (checked the values at locations of hot pixels after exporting to TIFF using SPP).

@Genehack, my files come out a bit darker as well. if I'm not mistaken, this is explained in one of the links as camera engineers setting the camera to underexpose and then raw converter engineers compensating.

I find I'm getting used to the lack of sliders, it's interesting editing on the keyboard without having to deal with a mouse.

 

[GeneHack]

It would be interesting to evaluate why there´s so much effort needed to at least match the SPP result. Why is that?

And why doesn´t RTT have a pleasant result straight out the box? As You can see my camera settings are not exotic, so what exactly does RTT refer to?

I cannot even get the tarmac neutral, let alone the car color.

Iliah?

 

[Iliah Borg]

It would be interesting to evaluate why there´s so much effort needed to at least match the SPP result. Why is that?

There is no point, IMHO of course, in making converters that emulate each other.

And why doesn´t RTT have a pleasant result straight out the box?

It's RPP, not RTT.

RPP takes time and experiment to master.

I cannot even get the tarmac neutral, let alone the car color.

Maybe use a click on grey method.

 

[left eye]

Hi Iliah,

could You introduce sliders?

I think the program is really good, the tweaking is IMHO unnecessary complicated and nerdy. But it seems fast!

Hover over a field box and use the scroll wheel on the mouse to change its value. You don't even need to click in the box, just hover over it and scroll the wheel.

Once you've change multiple values, just tap cmd+r to render the result to screen (if they were each on sliders they would have to be processed individually).

So I keep my finders over cmd+r (or I can memory muscle it quickly) then 'hover scroll-wheel' over values, a very quick system - and enables several fields to be changed before rendering to screen.

Ok it's not sliders, but in many ways it's a better system - except when the response from sliders is real-time (even though there's more noisy clicking and dragging involved).

Anyway, the approach of using just hover + scroll wheel quite a revelation.

Or if you're on a laptop with no mouse, on its touchpad just move the cursor over the field box (NO need to click in it), then two finger drag up or down to change its value. Amazing!

 

[da7329]

I think your missing what RPP is for. It is only for raw conversion to extraction the most data from a raw file for a editing starting in other software. It does not do behind The scenes processing to the raw file before opening as may be going on with ACR or maybe SPP to give a more wow opening starting point. If you like a more cooked starting point then it may not be for you. But if you want control and a true conversion of raw data without behind the scenes processing then it is a very useful tool.

DA

 

[shuji]

Thanks for looking into it for me Iliah.

 

[shuji]

just to update about the white dots that are caused by lower shutter speeds,... as per Iliah's analysis of my files.

the good thing is that they appear to be 1 pixel, well defined and white, unlike some camera hotspots which can vary in colour.

this means that the dust and scratches filter in photoshop takes it all out in one go.

edit: I forgot I was working in black and white which is why they're white of course.

edit 2: just tried it quickly, works well in color as well.

 

[da7329]

So the RPP dot tool did not work? I had a color file with A few small white dots and the tool work fine in removing them. Was a dp2m file.

DA

 

[shuji]

No it does work. And in most cases where you're being sensible, shooting in sensible light, with sensible shutter speeds, at sensible foveon iso, the dots arent too many and it works.

I tend not to do that, haha.

It might be related to the reason sigma came up with for the weird dp quattro design. They said it was about heat management, which I guess translates to slower shutter speeds.

Lower shutter speeds bring them out, 1/50 and you start seeing them. The removal button takes most of it out but when you increase exposure and zoom in you see more remaining.

Spp appears to hide them so you never see them.

I love how the files come out of rpp64 and was about to give up due to the white dots, but the dust and scratches fixed it all in a couple of clicks.

 

[da7329]

Good to know. Keep working with it! Maybe when you feel confident with it would be nice if you could put together a little tutorial on the steps you go through with it when converting a sigma to a tiff for further processing. There is very little in English on using it or videos. I will try to do the same when I get to a point where I feel I know it well.

DA