Lightroom/Camera Raw: Anybody use CHDK and process raws for Canon cameras that would otherwise shoot jpeg only?

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  • Updated 7 years ago
I've heard that its possible to use the CHDK firmware hack and process raws in Lightroom for cameras that would otherwise shoot jpeg only. I was just wondering if its worthwhile...

Note: CHDK supports option to create raw DNG in camera.

In particular I'm interested in anyone's experience doing this for the S5IS or similar model.
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Rob Cole

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  • excited to try this but haven't yet...

Posted 7 years ago

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Steve Sprengel, Champion

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Point and shoot RAWs can have significant amounts of noise so whether they are worth it is really a personal preference.

Looks like it should work, though:
http://chdktutorials.blogspot.com/200...

Be careful with the last couple links in this comment thread as they appear to be viruses.
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Rob Cole

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Thanks Steve - good tutorial, although dated...
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binsurf

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I wrote that tutorial and those links went to legitimate places at the time. Things have changed, and since I don't use my S5 anymore, I have no reason to update the blog. I do, however, apologize for the links.
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Lee Jay

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It works just fine, with a couple of hitches.

First, the camera isn't profiled and the default profile tends to provide some odd colors. You can adjust this in LR with the calibration panel, or you could create your own profile with the DNG profile editor.

The NR algorithms have no idea of your pixel size, and the assumption used for the defaults is for much larger pixels than the S5IS has. So, if you want the NR to work well, you have to adjust detail down, probably quite a lot.

That said, I've done it on my S3IS and, with adjustments, it worked pretty well.
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Rob Cole

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Thanks Lee Jay - its rockin' & rollin'...
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Rob Cole

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I've got it working...

Some notes:
- Overall I like Lightroom's noise handling better than DIGIC II (I'm not sure about the Lr NR algorithms / pixel-size stuff just yet...)
- As Lee Jay said, the color profile needs some tweaking, but then it seems fine.
- One issue though - there are some color splotches in the Lightroom version. But I haven't read the directions for the badpixels computation yet, so maybe its operator error. Here's what I'm talking about:

Present regardless of Color NR amount/detail.

PS - Still haven't figured out how to get the firmware mod bootstrapped upon power-up yet still access all 16GB on the card.
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Rob Cole

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This story still unfolding... but so far (other than the splotches in one test photo above), I'd have to say using CHDK in an S5 is like a whole new camera. Lightroom is better at rendering colors and detail than the camera firmware, plus there are the usual benefits of shooting raw...

Here are some examples (note: these were taken across a canyon at appx. 3/4 zoom)

In camera jpeg at ISO 80 (f4.5):


Lightroom processed raw of above (ISO 80, f4.5):


In camera jpeg at ISO 800 (f8):


Lightroom processed raw of above (ISO 800, f8):


(Note: no lens corrections were done on the lr processed raws)

Hats off to the CHDK reverse engineers!, and to the Adobe Lightroom engineers!!

What do you think?

Rob
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Rob Cole

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And just for the fun of it - a 100% crop (no output sharpening) of an Azelia photo taken today, courtesy of Canon S5IS/CHDK/Raw/DNG + Lightroom. ISO-100.

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Mark Sirota

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I thought this forum was supposed to be for discussion of Adobe products, especially feature requests and bug reports.
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Rob Cole

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This forum is also for discussing Lightroom/ACR/Photoshop related ideas and asking related questions... - the subject of this thread is *very* related.
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sizzlingbadger

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I thought this forum was supposed to be for discussion of Adobe products, especially feature requests and bug reports too.

Its getting way too noisy in here for it to be useful to Adobe.
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Rob Cole

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This thread is about how to use Lightroom and/or Camera Raw for processing camera files that one otherwise wouldn't be able to, by using the DNG format - can't think of anything more relevant...

How about you just hit delete when things don't interest you and let Adobe speak for themselves?

This technique opens up a whole market that would otherwise be closed - using Lightroom and/or PS/ACR for developing photos taken from point&shoot cameras that otherwise wouldn't support raw format.

You just couldn't be more wrong about how appropriate this thread is.
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Steve Sprengel, Champion

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I suspect some, based on the URL, expect only topics (questions/bugs) that are directed toward Adobe representatives should be threads on this forum, where the user-to-user forums are more appropriate for Adobe-related, but non-Adobe-directed, questions.

This thread is about using Lightroom for DNGs produced by a third-party product, but the question is not directed toward Adobe, but the Lightroom community as a whole.

Unless Adobe is going to moderate this forum; however, I don't know how it might be controlled to only Adobe-directed comments.

Besides the plus that Adobe treats this as somewhere to look for issues, there are several downsides to using this forum over the community forum:

(1) I can't follow all threads automatically, and only get replies delivered to my e-mail if I participate. Oftentimes the first reply is more interesting than the question and I never see those, w/o taking the time to click into each one.

(2) I cannot reply to threads via e-mail so I never can archive my own answers, since they don't get stored in my email client as a result of replying, nor are they delivered to my e-mail because I only get to see others' replies.

(3) Finally I have to log in every time I post a reply even though I have Remember checked and am already logged into Adobe's website. I suspect this has to do with the Login website being www.photoshop.com and the forum website being feedback.photoshop.com but it should work better.
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Rob Cole

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Thanks Steve. I have no problems staying logged in (I use my Adobe ID). Could it be client side problem? (win7/64 + Firefox 4)
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sizzlingbadger

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The login probalem is a known issue. I have it too.
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Rob Cole

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Sorta begs the question: What's causing it? (since some experience the problem and others not...) Cookies? Browser?
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Victoria Bampton - Lightroom Queen, Champion

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I've personally found it to be an interesting thread, although IMHO the U2U forum or a blog would be a better place for it to gain positive attention.

The FAQ page says:

"We're interested in what changes you would like see in our products. Do you have an idea for a feature that would help your workflow? Is there a small change that could be made to make your life a little easier? Let us know! "

and

"The main impetus of this site is to allow users to submit ideas and rank them."

It's up to Adobe themselves to decide whether to limit the posting of other topics.
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Rob Cole

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I thought this was going to replace the U2U forum. Please forgive if me wrong...
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Victoria Bampton - Lightroom Queen, Champion

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No, the good news is the dodgy U2U software stays on! ;-) The same FAQ page says "There are no plans at this time to replace the current user to user forums except for the forums covering Feature Requests."
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Rob Cole

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Ah. I guess I should have read the FAQ better. Although I did make a post on the U2U forum recently about fixing the search there and got a reply from a somebody with a decorated name like: "this forum software is being replaced". My subsequent inquiry for clarification garnished no reply. I subsequently made a wrong assumption...
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Victoria Bampton - Lightroom Queen, Champion

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No worries, now you'll be able to select the best place to post. I still think you should have a blog!
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Rob Cole

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If this forum is for Adobe-directed comments only, then please accept my apologies - this was not an Adobe-directed thread. Perhaps Adobe will comment on appropriateness.

Historical note:
-------------------
I've made a decision to be proactively defensive because I'm sick and tired of being put down on these forums, especially when all I am trying to do is help people in the community by providing information that could be useful (yes, sometimes I inform people about plugins, and yes sometimes those written by me...). Previously, I have mostly just sucked it up...

UPDATE: Future posts of this nature will go on the U2U forum. Please accept my apology for noising up this forum, and being a little uppity. Hopefully you have enough empathy to understand why I'm a little edgy...