EXCELLENT JOB...clearest I've seen... well done...

First video i watched about gamma and no need for a second one, excellent explanation Mister.

thank you for the info. Iam very new to photo editing and there isnt a day were i dont learn something new.

Thank you for this very clear explanation. It combined a nicely detailed component (graphs) with a simple take home message (think of it as midtones). I previously could see what gamma changes did to my images, but really didn't understand how the control related to other tools.

Fantastic explanation, thank you.

This video is going in my ASMR watchlist. No offense because it's not boring. It's just your voice is sooo relaxing.

I have gone back to all your videos rewatching them one by one and taking notes. While there were no notes for me for this one, I just want to say how much I appreciate your explaining gamma. You physical explanations help to make me remember all the knobs etc. Once I realized you were talking about a non-linear process (think amplifier) and that gamma was nothing more than a knob to help linearize the transformation algorithm from input to output, it now makes perfect sense. the fact that it focuses on the mid tones also helps to bound the practical limits. So, now for my request. I want a way to select what I call red. And I've been playing with a crude method to use HSL and the wheel to bound what I want as red, Then I change the color to something, do a merge visible, then select that something and make a mask. Of course the something has to be a unique color, etc so as not to be picked up when I ultimately make a mask. I'm looking for a way to use the HSL wheel to make a selection. Pls comment.

I am a computer programmer, and have math training, and I didn't know that the gamma value was the actual exponent. Thanks for explaining that.

Best defintion of gamma out there

Been a home cinema enthusiast for decades. I've played around with gamma and run calibrations but never really got it. Your explanation is the best I've seen because I'm a visual learner. Thanks so much. Typing this while my TV's running a 3D LUT to calibrate my colour :)

Great explanation. Thanks

Thanks for that video

So it's the freakin midtones in the end of the day! XD

You deserve my suscription.

Thank you for this easy to understand explanation of the old miracle of gamma...

Thank you. Fantastic explanation.

Well, that's another thing that I never understood! But I do now.

thanks for the explanation!! It was really helpful

Thanks Revision 2

Brilliant! Thanks!

Well explained! Sadly in GIMP it is 1/gamma in levels or something like that...

Why and what for would I use it in editing?

Thank you for taking the time to explain this. Some lights when off in my head during your presentation. For example: I shoot and produce short videos but have been struggling with shooting in log … until very recently. I really feel I’m close to perfection in replicating real world colors. The software I use allows for me to choose Canon Log 3 which is the input color space. It also allows for me to choose the monitor color space which I normally have set to Rec709 gamma 2.4. Now, all that said, I find that I must reduce gamma of the input (what the program calls the timeline color space) by just -0.04. So, based on your presentation, is this really a resultant gamma of (drumroll please) 2.4-0.04=2.36? Or, am I too nerdy? The video clips are just too bright if I leave the gamma adjustment at zero. When I pull it down as stated, everything looks spot on perfect.

I am studying a media and my teacher said that Gamma refers to the luminance of light, and that Luma was a seperate term which refers to the levels of light. It sounded reasonable when my teacher explained it. now i have started researching I assume that Luma is short for luminance and i am struggling to understand the difference between luma and gamma. can someone please take a read and try to explain this for me simply.

Dave if I send you an image could you do a video in a specific topic. Example overblown sky but it's not rectangular so can't use gradients. Irregular shape.

Hello there. Is that the real Stone Henge?

Great videos! Thank you! One question, any chance of less lip smacking?

I am part of an interesting discussion around color picker calculations and display scaling calculations in Darktable... As an aside I went in to Affinity and it too seems to not calculate pixel values correctly. The premise is a checkerboard image of two colors is used... at 1 to 1 each square is visible as you zoom out there is necessary scaling of the display.. The two colors if averaged as you would with the picker and to some extent some display scaling should result in a light green if the calculations are done by conveting the values to linear srgb doing the average and then converting it back to display coded srbg. It seems the posted suggest that is what should happen but that many software programs and it would look like affininty included does the average in with gamma so that the resulting color is a dark rose and not a green.... As a math guy I would be interested in your take... The png file and discussion is provided in this thread... github.com/darktable-org/darktable/issues/12310