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tonemapping improvements

I’ve dabbled a bit with HDR (high dynamic range) imaging, and haven’t been too thrilled with the results. So I finally invested a little time a couple of days ago reading up on qtpfsgui, the free, open-source software that I’ve been using to play around. The discussion on the Flickr group for the software was particularly full of useful hints and tricks.

A little explanation: True HDR can’t actually be displayed on something as pedestrian as a computer monitor. So once you’ve constructed an HDR image from multiple exposures of the same scene, you still have the problem of figuring out how to display it in a visually appealing manner. That’s where tonemapping comes in: it’s the combination of art and science, the wizardry that uses manipulation of contrast, colors, and edges to fool your eyes into thinking they’re seeing a greater dynamic range than any monitor can actually display. This is the step that has been problematic for me, as I’m neither an artist nor a scientist. I can’t tell you the technical difference between the algorithms, and I don’t feel too confident in my own artistic judgment in adjusting the parameters to produce the final product.

Fortunately, I did what every good dilettante does: took refuge in someone else’s instructions. The process is relatively simple, but not one that had occurred to me: produce two differently-tonemapped versions of the same scene, and then overlay one upon the other using Photoshop or the like. Doing this allows you to produce a composite image that captures the strengths of different tonemapping operators. In particular, the recommendation was to use the Drago process to create the base layer; it produces an accurate, real-colored, but very dull and low-contrast image. Above that, an image produced using the Fattal process, which yields dramatically more contrast, and intense and saturated colors, can be overlaid, and the opacity of the overlay adjusted to produce the desired final effect. Simple, easy, and tremendously effective!

Of course, you shouldn’t take my word for it. Check out some side-by-side comparisons instead! I tried this first on my most recent HDR image, the night skyline view along the railroad track from Hyde Park Boulevard. Here’s the old version:

skyline HDR

And the new, improved version:

Illinois Central - better HDR

Much better, no? Here are some more comparisons. Cityfront Plaza downtown:

Cityfront Plaza HDR

The railroad and skyline from 18th Street:

18th Street

The Michigan Avenue plaza:

Michigan Avenue Plaza

And NBC tower:

NBC Building

Now that I have this down to a reasonably easy process, hopefully I’ll try some new shots soon. In particular, I want to try daytime photos.

Happy Fourth! Ouch!

I went for a good run today, and shook up my route to take me past Obama’s house. That wasn’t really my goal, but it just sort of happened.

Anyway, when I got home, I noticed there was something weird. I’ll skip the icky parts and go straight to the conclusion: I have a hemorrhoid. Great.

I have to admit I was pretty unhappy about this. I got some advice, and headed over to Walgreens for supplies. Hopefully if I treat it properly, it’ll go away soon. Lots of ointment, prune juice, and special wipes, the works.

When I got to the checkout line, the cashier smirked, tapped the box of hemorrhoid wipes, and said “You got your Taste of Chicago right here.”

I just about died laughing. And, for the moment, I’m not pissed off that my body chose to celebrate the Fourth by blowing up a blood vessel in my ass. That cashier deserves a medal.

spicy flickr-ing

I’ve made a few more changes to how I deal with photos. I’m no longer posting new ones to the gallery on reallyboring.net. The old ones will stay there, but it’s been relegated to a link below the sidebar block of recent photos from my Flickr photostream.

salsa, extra chunky

The gratuitous picture of salsa is brought to you by the Flickr Photo Album for WordPress plugin. It enables me to feature images from Flickr easily in my blog posts…

salsa

…like so! It seems to have a few bugs, but such is life on the bleeding edge.

What? You don’t think I’m on the bleeding edge?

By the way, anyone know a healthy way to eat salsa? I love my homemade salsa (despite the fact that I had irredeemably bad onion and garlic breath for about a day), but it sort of ruins the yummy-fresh-veggie appeal to eat it with a big bag o’ chips.

awesome, or instant buyer’s remorse?


bicycle?, originally uploaded by reallyboring.

My most recent hare-brained scheme: I have now acquired a folding bicycle. I picked it up today in western Lincoln Park. Actually, it has a twin, and I picked both of them up, which was a bad, bad idea. (Long story short: the other one is not for me, but for the person who first found them on sale.)

These things don’t fold up nearly as nicely as I had envisioned (at least not intuitively; no handle for easy carrying, and they flop open all the time), and they each weigh about twice what my hybrid weighs. Lugging them cross-city sucked huge donkey balls. Maybe one is convenient to take traveling, but at this point I’m even skeptical of that. I think I’m going to have to hide it for a week while I get un-bitter, and then I’ll make a go at actually doing something with it.

But at least in theory, this should be a great bike for some short-range weekend train and bus vacations…and my other hare-brained scheme, the car-free Six Flags Season Pass adventure.

“doom with a view”

Once again, I recently had the opportunity to drool over the gorgeous view a friend has from, uh, his or her apartment, which is ideally situated for amazing skyline photos. Needless to say, I availed myself of the opportunity. I’ll let the photos speak for themselves. (You can also check them out on Flickr, where they have proven to be astonishingly popular.)

Looking north towards the Loop:

And here’s a two-exposure HDR of the view north, which I’m reasonably happy with:

Looking northeast at the lakefront skyscrapers of Hyde Park/Kenwood:

Looking due northeast, across Kenwood towards Bronzeville and Bridgeport:

Due east, including the ghost sign for the old Piccadilly Theater:

Southeast, over Hyde Park towards the University of Chicago campus:

And some gratuitous train shots, just because:

I love my courtyard view, which was a huge upgrade over my previous views (in reverse order: a brick wall, and parking lot, and another brick wall). But it’s no match for this!

individual rights in Chicago

The Tribune ran a piece straight out of Reason Magazine proclaiming Chicago the the least-free city in America.

A welcome corrective to the most recent round of adulation that glosses over a bit too much that’s still going awry, including a City Council both meddlesome and overly complaisant to the wishes of the Lord Mayor? A totally justifiable attack on 10.25% sales tax?

No. Rather, they’re pissed that Chicagoans can no longer smoke in bars, must not drive while talking on handheld cell phones, and pay high vice taxes. They characterize the city as having an unhealthy blend of “blue state public health fanaticism” and “reddish state … moral prudery”. Welcome to the Midwest; and welcome, by and large, to common sense.

There are certainly restrictions and activities that they unearth that actually are problematic. The growing surveillance network in the city is absolutely creepy. It sucks that (some) drugs are illegal and the subject of prohibition rather than taxation and regulation; ditto prostitution. But the legal and cultural framework within which this city operates means those things are unlikely to change here anytime soon. When it comes to drugs and sex, it’s quite unfair to blame the city when the state and federal government are the real problems.

By and large, though, the article takes an obnoxious stand on the “fuck you, I’ll do what I want” side of individual rights, and one utterly dismissive of the possibility that the actions of the legislative branch might actually reflect the will of the people governed, even when it reduces their freedoms to act. Good luck stacking up the second-highest population density in the country with that outlook.

Disappointing though I found the article, the subject brings me to two specific things I’ve been meaning to write about.

District of Columbia v. Heller

I don’t actually have a whole heck of a lot to say about this. The Supreme Court’s decision to strike down DC’s handgun ban wasn’t a surprise, and a lot of constitutional legal scholars that I respect seem to agree with their interpretation of the Constitution, even if they dislike the result. It’s certainly possible to agree with the reasoning, and abhor the outcome, which is more or less where I stand.

I grew up in a household with guns, in a city. I even shot them a few times, although I hated it. I don’t like loud noises, and recoil is terrifying. Plus, I have no aim. The guns were stored safely, and only came out on trips out to our family “farm”, or what’s left of it, east of the city. I’ve got no real problem with hunting (as long as you eat it) and shooting skeet, and live mistletoe is cool to have for the holidays, but it’s not my thing. I only shoot with my camera on our annual Thanksgiving “hunting” trip.

I’ve also been robbed at gunpoint, as long-time readers may recall. I certainly recall it, although it made less of an impression on me than you might guess having a gun pressed to your head would.

But if you add up my disinterest in shooting guns, with the fact that I’ve been victimized by one, you can probably guess how I feel about them: not particularly positively. They have their uses, for sure, but there are just too damn many of them floating around, in my opinion, and our culture has an unhealthy attachment to them. The right seems to think we’ll be safer if more people can own guns legally to defend against the crooks who already own them illegally. I think a society like that is no society I want to live in.

So ultimately, and without hope of getting what I want, I think we need a constitutional amendment that enacts sensible regulations on the right to bear arms. Unfortunately, I think the history and culture of this country makes that completely unlikely, and it’s one of the (relatively few) things that I truly deplore about this country.

I don’t predict mayhem on the streets as a result of this decision - it’s already hell out there now compared to countries with reasonable cultural and legal frameworks for firearms. Unfortunately I don’t see any of this changing, with or without gun control laws.

Photographer’s Rights

Something else I feel strongly about is the right to take photos in public places. Chicago’s generally a good town for doing that in, although there was that silly business in Millennium Park, the CTA can be touchy, and that stupid “No Cameras” sign on the gate to the Calatrava bridge construction area in the Loop. I’ve had a couple of awkward encounters in outlying neighborhoods, but nothing serious. Except at the Pride Parade, I actually usually try to keep people *out* of my photos, which makes things easier.

Nonetheless, there is plenty of stupid nervousness in the air thanks to 9/11. The notion that photographers are a security risk is complete and utter horse manure, of course, but the connection has been made in the public psyche, so it’s a good idea to know your rights (and maybe even carry them around with you in your pocket).

Edgewater gems

The Belle Shore apartment building is one of my favorite in all of Chicago. Clad in green and cream-colored terra cotta, with Art Deco designs, it’s like a cool sip of mint julep on the skyline of Edgewater.

Not far away stands the grandest six-flat ever built in Chicago, the Manor House, by architect J.E.O. Pridmore, one of Edgewater’s own. He’s better know for theaters, but his residential work is very attractive. This particular building was a lavish apartment house - some of the apartments even had ballrooms! They’ve since been subdivided, but the integrity of the building remains evident, and it is rather unique in Chicago residential architecture.

(These, and a few other photos besides, are also on Flickr.)

Pride Parade!


Miller Lite, originally uploaded by reallyboring.

I’m shamelessly using eye candy to lure people into looking at all my Pride Parade photos, which are now on Flickr. I suppose I’m no better than Miller Lite. But as lures go, this one would totally work on me!

The parade, despite the one-hour stall (caused by a dancer who fell off a float) as well as the volatile weather, was a lot of fun.

next stop, pain!

In train-related bad news that hasn’t even made the news, see Jennifer’s post: It’s time for another game of What the *&^%$#@! is G-Rod Doing Now?. Apparently Illinois’ Amtrak services are on the chopping block in the fresh round of budget disputes that were supposed to have ended a few weeks ago when the legislature passed a budget. Oy.

And in more idiotic train-related news: Amtrak hints service to Memphis may be sinking. Evidently, a gigantic sinkhole (haha, get it? get it? I hate the Commercial Appeal’s headline editor) opened up right under the tracks downtown, and the city and Canadian National are having a pissing match over whose job it is to fix the damn thing. Amtrak has been routing trains around Memphis, and providing special bus service, but if the problem doesn’t get solved soon, they’ll just axe the stop completely.

*Must restrain desire to assassinate all politicians everywhere…with mind bullets!*

I’m going to be extremely put out if my next trip to Memphis involves a bus or an airplane. Actually, an airplane would be fine, as long as airlines and airports weren’t also involved. *Sigh*

the shameful runner

When I have bad bouts of lethargy, it usually takes me a few days to realize that it is, invariably, due to not having exercised enough recently. So I went for a run this morning.

But I passed a couple of jovial fat men in suits sitting on benches on Drexel. One of them grabbed his gut, bounced it up and down a few times, and shouted “Keep at it, you can lose the weight!”

Yowch. I know I could stand to lose a pound, or fifteen. But please don’t point it out to me while I’m exercising!

I ended up running all the way to McCormick Place (8 miles) instead of taking the intended short run. I even got a blister, in my blister-proof socks. But I feel better, at least.