2020-04-18

Late One Night, I Was Working in the L*a*b

COVID-19 means a somewhat monastic life. Shop once a week -- brandy, gin, tonic: the essentials, quick nip down to the dog park so the doggos can go for a trundle, wait for the snow to melt so I can get into the shop and start on the ever lengthening list of make and mend projects and recently, rediscover some old post-processing techniques.

Everybody has them: that image that is as near perfectly exposed as you can get, the composition is good and when you made the image what you saw spoke to you at some level.

But...

When you pull it into your RAW processor of choice no matter what you do it lies there like a gopher on a prairie highway: flat and dead. You feel like you're staring into a washed out desert at high noon and no amount of finangling can fix this turd of an image. In your gut, however, you know that this image has merit and shouldn't be given up on.

I was out visiting my mother and sister in the Comox Valley a while back and is usual it was raining. In all the years she's lived there -- about 20 plus -- I can count the times that I've actually had a sunny day. It's been rain, snow, wind, rain, cloud, and all the possible combinations: sometimes within a few hours. This visit was no exception. I was lucky this time: the rain wasn't blowing sideways.

We had headed down to Coombs to hit the Dutch Store for some essentials. You readers who have more than a few ounces cloggy blood in you'll know what that means. We'd taken the old Island Highway down and on the way back we decided to stop at Qualicum Beach to have a cup of coffee. Sitting on the promenade I made the following image. The sky was clearing and the Coast Range across the Strait was getting seriously rained on. The shimmering water, the Rembrandt sky. Yeah, so I got this instead:

Straight Outta RAWton
Flatter than a dead gopher on a road, amirite? It looked okay when I chimped the black and white image. I shoot both raw and a BW jpeg. The composition works. The rain hammering down on the Coast Mountains, the shimmering water illuminated by the patch of sky and the cumulus cloud.

The composition works, yet the tonalities I saw just weren't there. I knew the image I saw through the view finder was in there. I just had to liberate it from its current digital capitivity.

Looking at the histogram, the exposure is about right. Maybe overexposed by a 1/2 to 2/3 stop but really nothing too egregious. In what follows I have to note that I use a colour balanced workflow: calibrated monitor, monitor brightness dialed back to match a glossy print und zo weiter.

Base Histogram
Okay, so let's tweak the exposure -1/2 stop. Hmm, nope. That made the greys go to where they were supposed to but muddied the sky and cloud. That sky was a  very bright blue. OK, Let's muck about with the other exposure sliders. 

Slider Settings and Histogram
Post Sliders
It's close but still not exactly what I was looking for. As well, these settings amplify noise in the sky if you zoom in -- not really a good thing

Sooooo, let's mess with the Tone Curve. I just grabbed the default Strong Contrast curve.

Default Strong Contrast Curve

Post Strong Contrast Curve
Still a load of Nope. I'm clutching at straws at this point so let's mix the sliders and curves together
Sliders and Curves
Now we're starting to cook with gas. The sky is starting to peep through as I had envisaged it, the heavy rain on the mountains is still there but now with the intensity I had desired, and the clouds showing the textures and shades that I want to show. The bottom of the image still sucks though.

Still it wasn't quite right. I really get worried when I have to yank sliders around that much. I start getting concerned about how things will appear when printed. I process in the ProPhoto colour space but that has a wide and tolerant gamut. When you go and print you really have to watch for out of gamut: this depends on the paper that you are going to print on.

In many other attempts I was drawn to the presence sliders but this image really made me think twice about these: quick and easy micro-contrast at the expense of sometimes cartoonish images and "interesting" colour shifts -- especially in this image, and noise. I tried Topaz Adjust AI, a full ON1 Raw tool chain and ON1 Effects only. None of these really did what I wanted. I may have missed something but really, the results didn't float my boat. I don't do single image HDR. That's just not done in polite company!

I let the image sit for a while. I'll do that when I'm stymied. No sense flailing about willy-nilly and going nowhere fast.

I was staring at my library the other night and my eye happened on Dan Margulis' book "Photoshop LAB Color: The Canyon Conundrum and Other Adventures in the Most Powerful Colorspace" Long out of print, Margulis takes you through LAB and shows you how to use it to make some really potent corrections quickly. He admits that there are other ways of achieving the same thing but LAB is really quick and a reasonable tool to use when faced with seemingly intractable problems like bring life to desert scenes, complex colour corrections and retouching badly damaged images. I used the latter to clean up some images of my wife's ancestors' photos made in the Ukraine pre-Holdomor. There are PDF copies of the book floating around the internet but do try to buy a legit copy if you can. Some of the scans are really crappy.

I'm not going to give a course in LAB or why these techniques work. I'm just going to work through this image to see what we get.

In the book there is an example of him using LAB space to bring a flat seascape (sound familiar?) to life. Without getting into the deep hairy details about LAB, this it what the channels in LAB mean:

Example of LAB curves
L goes from dark to light, from 0 to 100; L is never negative (A & B can be). An L value of 0 means pure black while and 100 means pure white. An L value of 50 is equivalent to a 50% grey. L controls exposure and contrast only. In RGB, mucking with the contrast can (and usually does) muck up the colours. The a & b channels govern the relationship between the opposing colours that are part of the theory behind LAB. The values for these channels range from -127 to +127. A value of +128 means a is all magenta or b is all yellow and a value of -127 means a is all green or b is all blue. Mixing all this up you can get any colour that exists and some physically unrealizable colours as well: liquidine velvet chermerculoid yellow springs to mind.

PLEASE NOTE! The above is horribly simplified. Read Margulis' book if you want to get down and dirty with LAB, its theory and practice.

Also note that in the curves shown above and below I'm following Margulis' practice of showing them from 0 to 100% with lightness to the left as opposed to the PS default of lightness to the right. This setting is equivalent to "ink deposited" that is used when working in the CMYK space. You don't have to do this. Do what ever you want as the Chesire Cat said.

So, Hi! Ho! Hi! Ho! into Photoshop we go.

After changing into LAB mode we add a Curves adjustment layer. After a some experimentation I came up with these adjustments: 

Final LAB Adjustments
You'll notice that there are no adjustments to the a channel. The a width of the a channel histogram is so narrow that no matter what you do (unless something very, very rude to the curve) nothing happens. I also made sure that after the adjustments everything was still in gamut for the printing service that I use.
Post LAB Image
This is what I was going for. Not to over cooked, nicely in control. This was done much quicker that all the phaffing about in LR to get a less desireable result (to my mind, at least).

So, back into LR to do just some minor tweaks. I wanted to enhance the shimmer of the reflection of the cumulus cloud so I applied a radial filter comme ca: 
Radial Filter
Then a bit of sharpening, masking out most of the blocks of relatively continuous tone et voila, the final image:

Final Colour Image
I can now pull this into NIK Silver eFex and get the black and white image I was after. No, I'm not sharing my workflow there; that's my "secret sauce":

Final Black & White Image
A successful session in the LAB I would say.

And now, some Bobby Pickett:


2020-04-02

Opa Gaat Op Reis

Joe's Juice

In Which a Newly Minted Opa Flies to Denmark to Make that ONE Image (and maybe a few others too)

"An Opa? You mean as in grandfather?"" asked gin and tonic across the table.
"Ayup, as of November 23 of last year." 

"Gorn," said Red Ale. "You? Lord help that kid."

Lager Lou nodded. "Next thing you know you'll be having him make horrid puns in Danish, as well as Dutch and English."

"Have you seen the lad then?"
"Ayup, February, just before the virus hit the fan."
"Took him to a blues bar then?"

And so on...

That dear reader, is the level of intellectual repartee at the local; a right lot of charlies they are. But it is true, I am now a grandfather. And yes, I was lucky enough to see the lad before the world came to halt comma grinding. As the subtitle says, I only wanted to make that ONE image, that one image that captured what I thought having a child was all about. I made one of my wife and daughter when my daughter was but a week or so old and I wanted to see if, some 20 years later, I could turn the trick again.

Getting to Denmark from the wilds of the Alberta Foothills is a bit of a trek. You have to (if you're flying WestJet) transit through Mordor, or London Gatwick as it is known to the local jobsworths. Little did I know that we would be staying at the Barad-dûr Inn and Suites

Courtyard, Premier Inn, London Gatwick (LGW)
All joking aside, the Premier Inn is a pleasant hotel for a passenger in transit – even with Sauron as the architect. Thankfully the only Orcs I could detect were over in airport security.

Copenhagen in February is a different kettle of hygge than Copenhagen in May or June (when I was there last). Remembering that it is farther north than Grande Prairie, Alberta (where I used to work when dinosaurs roamed the Earth) the sun in February rises late, sets early and doesn't go that far above the horizon (18 deg or so at noon) which makes for some interesting lighting challenges but also some fantastic opportunities.

Seven to 8 hours of daylight and a low sun is just the start. With an average of 11.4 days of rain and 2.4 hours of sunlight in February there's good reason for Kierkegaard being referred to as "that gloomy Dane".

So, when it's not raining you have to usually work in an overcast. But when the sun does appear, even through scattered clouds, the quality of the light is just, just... wow. I can't describe it. The colours are saturated, the detail is sharp, even to my aging Mark I eyeball. In short, a delight (hah!) to work with!

Harry's Place

Miss Ruth is not at home today
With light like that, that ONE image would have to wait for just a bit. 

It had rained earlier in the morning and I was out for wander and ended up at Kødbyen or the Meat Packing District. I like to go there every trip because this is where you can find The fotographisk centre (http://fotografiskcenter.dk/). A great gallery with the greatest people working there: they really care about photography. This image is an example of what I was talking about when I said that the low sun angle made for some interesting lighting challenges. 

Here, you're not only shooting into the sun, but the sun in this case is at about 18 degrees above the horizon, just out of frame to the right. I had to do a lot of dodging and burning to get the clouds in the sky to balance with the brooding gateway. It wasn't until I started processing that I noticed that the lines leading up to the gate reminded me of railway lines leading up to another gate that is known for something much, much darker. When that hit me I reprocessed for a much more grainy and turbulent image. 

Øksnehallen

Brown Market Slaughterhouse
One system was passing and another was to come (say hello Storm Dennis) but in spite of that we went up to Gilleleje to have lunch at one of my favourite restaurants (Restaurant Gilleleje Havn & Krostue) and to walk along the ocean. The wind was up and the clouds where racing along in eager anticipation of dumping another metric butt-ton of rain on an unsuspecting Copenhagen.

Conveyor, Gillelejehavn
Figure and Dunes
OK, OK; I've been blithering long enough; on to the money shot. Unfortunately this term has been corrupted by the Internet (see Rule #34) (if you don't know, look it up). As far as I'm concerned it's that image the client pays you for or is iconic in it's ability to communicate. It could be Bobby Orr diving across the crease after scoring the winning goal for the Stanley Cup, the sailor kissing the nurse in Times Square, or Ghandi sitting by the spinning wheel; it's that ONE shot.

I was lucky that my son was at work and that my wife had slept in so I was able to spend some time with my daughter-in-law on my own. After chit-chatting about this and that I casually pulled out my trusty E-P2 and with the 45mm (that makes for a nice 90mm equivalent portrait lens). I noodled around a bit while Stine was putting on the baby sling so she'd get comfortable with me and the camera. Click, nope. Click, nope. Click, nope. I was starting worry that I might "Hungry Joe" this shoot. How about we move here. Click, nope. And then: click, click, click – magic. Three shots, three images that captured the bond between mother and child.

Mother and Son
So, I did get that ONE shot. And made, I think, some other nice images as well. The whole gallery is here