Tag Archives: High Dynamic Range

2014/04/15 (T) A Taxing Day

At 1:30 AM (Tuesday, April 15) my cell phone issued a severe weather alert tone.  The message from the Weather Channel app was an emergency notification that a flash flood warning had been issued for Freeport and advised us to seek higher ground but to not drive through water.  If we had not already been awake, we were now!  But then, that is the point of having your cell phone set up to alert you to dangerous and threatening conditions with a sound that announces an imminent nuclear attack.  As if that wasn’t enough, the leak at the passenger-side rear corner of our bedroom vent-fan reappeared.  I had applied a liberal coat of Dicor self-leveling lap sealant to the outside of that vent-fan back at Williston Crossings and it had not leaked during two subsequent heavy rain events, so I thought I had taken care of that problem.  Either I missed a spot or the water got in somewhere else.

Although Live Oak Landing is on the Choctawhatchee River it is on ground that is noticeably higher than the water level and the RV sites are not right at the bank.  I figured we were safe as we could see the east end of Choctawhatchee Bay from the front of our bus.  Ocean water levels rise and fall with the tides, but oceans don’t flood.  The interior roads and sites are paved, so they were not going to get washed out by the rain and we were not going to be mired in soft ground.

We had a lull in the rain between 3:00 and 5:30 AM and I used the time to work on blog posts covering the 12th through the 14th and keep an eye on the weather.  I prefer doing one post per day, and uploading it before I go to bed, but that is not always possible.  When I first started blogging I would often write the rough draft in bed on my iPad, e-mail it to myself, get up early the next morning, finish it, and upload it.  I still do that sometimes, but just as often I end up several days behind.  BTW:  The WiFi at Live Oak Landing is very good.  We have been able get connected and do what we needed to do, even when it was raining.  We also have an acceptable Verizon 4G/LTE signal here.

The rain resumed briefly at 5:30 AM but without the previous intensity and fanfare.  It started again at 6:50 AM.  I checked the radar on my iPad Wundermap app and it showed the cold front just a few miles to our west and another fetch of rain beginning to come on shore and positioned to train over us.  It was not severe, however, and the band ultimately drifted east of us before coming onshore.  The rain event in most of the panhandle was done by 8:30 AM.   The end of the rain event, however, was not the end of the weather warnings.  Flash floods occur during and shortly after heavy rain events, but rivers can rise above flood stage long after the rains have moved through as large volumes of water upstream try to make their way to the sea.

There was no sunrise today, just a gradual change from night to muted, grey light that continued through the morning.  By mid-morning the cold front had passed by us, the winds had shifted from southwesterly to due north, and the temperature had dropped. A low pressure center had moved directly over Atlanta, Georgia with the cold front trailing SSE into the Gulf and the rainy weather shifted to northeast Florida, downeast Georgia, and up the Atlantic coast.  A wider view of the continent showed the heaviest weather farther north.  The cold front stretched along the Appalachian Mountains, up through Quebec and then wrapped around through Labrador and into the Labrador Sea.  There were four additional low pressure centers located in northeast Pennsylvania, southwest of Montreal, over the middle of Labrador, and just off the coast in the Labrador Sea.  Behind the front was cold and snow; in front of it, rain.

Linda checked the weather back home. The 3+ inches of snow recorded overnight in Detroit, Michigan pushed the total for the season to a new record of over 94 inches.  The old record was established in 1880/81.  This has been a historic winter with records broken across much of North America.

By early afternoon the storms were gone and the day was struggling to become partly cloudy instead of all cloudy.  The temperature barely broke 60 and it was windy so it still felt like winter’s last hurrah.  Linda discovered last night that the dish soap we bought at Publix never made it into one of our grocery bags.  It happens.  We needed more toilet paper, so we headed back to Publix in the early afternoon and stopped at the customer service desk with receipt in hand.  Mary said it was “no problem, just pick up the soap and tell the cashier that Mary said it was OK.”  It was only a $0.69 item, but we appreciated that Publix took our word for it.

With our shopping taken care of we decided to drive west on US-98 about eight miles to Destin, Florida.  The closer we got to Destin the more developed the area became.  We saw a sign for a Panera at a premium outlet mall and decided to go there for lunch.  Destin is a very upscale, resorty kind of place.  We crawled through traffic, and some of the worst engineered traffic signals we have ever encountered, to get to the mall and the restaurant.

The parking lot was packed and so was the Panera.  Apparently the stormy weather had prevented the residents from getting their maximum daily dose of high-end shopping, and they were all out on Tuesday afternoon making up for lost time.  In spite of the crowd it did not take long to place our order and receive our food and it was the same good quality we have come to expect at Panera wherever we find one.  Unlike Watercolor, which seemed vibrant but relaxed when we drove through yesterday, Destin seemed crowed and almost frantic; not our kind of place.  The traffic lights were so stupidly set up I concluded that the traffic engineers must hate rich people and were using them to inconvenience them to the maximum extent possible.  Being neither wealthy nor tolerant of stupidity, we finished our lunch and got out of town.

Before returning to Live Oak Landing we drove past Topsail State Park, a former commercial RV park, and through the very upscale community of Santa Rosa Beach right on the Gulf of Mexico.   We then drove to Freeport just to check it out since Live Oak Landing has a Freeport mailing address.  It was a one intersection town without anything special to recommend it.  Been there, done that, no reason to go back.

Back at our coach we were both very tired, having had very little sleep last night, and took a nap.  Naps are a great thing.  I used to consider them a luxury, but I’m seriously considering making them a part of my daily routine.  When we finally woke up Linda made a green salad and re-heated the spicy quinoa and black bean dish from the other night.  A beautiful sunset suddenly developed and I grabbed my camera to try to get a view shots.  This kind of lighting situation really requires a tripod and the use of the high dynamic range (HDR) technique, but I did not have time for either of those, so I got what I could hand held.

Sunset at Live Oak Landing.  (This photo has more image manipulation than normal.)

Sunset at Live Oak Landing. Our coach is lower right. (This photo has more image manipulation than normal because of the extremely high contrast lighting.)

Live Oak Landing has cable TV but we were able to pick up a surprising number of channels over the air (OTA).  We watched a couple of shows while I worked on blog posts.  The forecast low for early tomorrow morning was 39 degrees F, so we closed the ceiling vents and windows before we turned in for the night.

 

2013_10_17 (R) The Middle Prong

It rained lightly all last night and into the first part of the morning.  That may not bode well for many outdoor activities, and you might assume that it would be a bad thing for photography, what with everything being wet and the sky being overcast.  Au contraire; while overcast skies reduce lights levels, we tend to work on tripods for landscape photography anyway, so that is not a problem.  On the plus side, the lighting is much more uniform, which helps in situations such as narrow river valleys with lots of tree cover where strong direct sunlight causes unmanageably large dynamic ranges and can create troublesome specular highlights.  On the downside, colors tend not to be as vibrant as one might like.  On the upside, having everything freshly wet deepens the color and overall tone of the scene.

The Middle Prong, GSMNP.

The Middle Prong, GSMNP. (Luminance HDR, 3 10Mp raw images).

But first we went to breakfast and kept an eye on the weather, because none of us felt like actually working in the rain.  The overcast hung around, with low clouds in the valley by our camp, but the rain stopped and we headed back into the Great Smoky Mountain National Park Cades Cove entrance.  We immediately headed up the road that runs along the Middle Prong of the Little River.  Lou had scouted this road previously and knew that it ran for about 6 miles, the first couple paved and the rest newly redone gravel.  There were two narrow bridges before the turnaround at the end, and lots of places for one or two cars to pull off.  We had a caravan of three vehicles, so finding good spots to stop was a little hard, but I think we found some good ones as I hope the photographs in this post demonstrate.

The Middle Prong, GSMNP.

The Middle Prong, GSMNP (Luminance HDR, 6 exposures w/ Mantiuk08).

The Middle Prong drops gently but persistently for its entire length, and is littered with rocks and boulders the whole way, providing lots of possible “water shots.”  There was one waterfall opportunity as well, but it did not have much water running over it today.  We stopped anyway.

The Middle Prong, GSMNP.

The Middle Prong, GSMNP (Luminance HDR, 6 exposures w/ Reinhard05).

My main “focus” for today was learning how to use the High Dynamic Range technique.  This is a two step process that is primarily suitable for photography stationary objects or scenes, such as landscapes.  Step 1 involves shooting the scene with a range of exposure settings from under-exposed to over-exposed.  Step 2 involves the use of post-processing software to combine the set of images into a single final image.  I downloaded Luminance HDR (32 bit) the other night and installed it, but hadn’t had a chance to work with it yet.

The Middle Prong, GSMNP.

The Middle Prong, GSMNP (Luminance HDR, 6 exposures w/ fattal).

I got a set of images to work with while Linda took some excellent photographs on her cell phone.  She is much more inclined to capture images with her cell phone or her iPad than I am and we have spent a little time on cell phone camera/image apps in the workshop.  We headed back around noon, had a bite of lunch, and headed back to the classroom around 1:30 PM for our final session.  The topics today included HDR, cell phone apps, programs for making collages and videos from still photos, and Adobe Lightroom.

E The Middle Prong, GSMNP.

Lou and Vince shooting the Middle Prong, GSMNP (single image).

We originally planned to meet Friday morning to review images, but we wrapped up around 4 PM and decided that we had taught/learned as much as we could for the week.  That will allow Linda and me to get an earlier start tomorrow than we originally expected.  Back at the rig I hooked up the water softener and water line to the coach and refilled the fresh water tank.  I then worked on editing images and composing this blog, with some time out for a simple but very tasty dinner of green salad with granola topping and whole wheat penne pasta with sun-dried tomatoes and homemade marinara sauce.

Panorama of the Middle Prong, GSMNP.

Panorama of the Middle Prong, GSMNP. (constructed with MS Image Composite Editor from 9 images).

Lou was interested in seeing how WordPress works, so I agreed to meet him back at the classroom after dinner.  I decided to show him how I create a blog entry in real time by building this one.