Interesting caption to one of the photos regarding how the temperature of the environment has changed:
>Axel Lindahl’s picture of Engabreen from 1889 shows the foot of the glacier, where there was only ice, glacial gravel, water and bare mountainsides in a seemingly cold and hostile landscape. Now, more than 120 years later, the valley has become far more fertile. Birch forest, shore meadows, willow thickets and marshland have established themselves, while the glacier arm has retreated far back up the mountainside.
"Imagine a time machine that could take you back 150 years. Open the door and look out at the slopes of Vermont, the Green Mountain State. In 1850, the slopes would be anything but green. Most would be barren, stripped of their trees, and trampled by grazing sheep."
Changes in landscape and colonization by various plants as glaciers retreat is a very, very well-documented process. The vegetation changes in the picture shown are unambiguously due to the retreat of the glacier.
Global changes aside, it takes awhile to form soils that will support plant life. Near the foot of a retreating glacier, you'll always have till and moraines. If they've been recently exposed, they'll always be bare. It takes a few decades for forests, etc to get established.
Deforestation was happening in the 1600s and 1700s and required the stopping of many saw mills.
I just say this because humanity really did horrible environmental things throughout our history. For example the ceders of Lebanon being completly cut down by 800 BC and the deforestation of Israel during the crusades which never came back.
That's all very true, but for that particular picture, the lack of vegetation is because the area was covered by ice only a few years before. Note the lack of soil in the older photo. There's only rocks and silt.
Idea for computer-imagery/ML people: a method to realistically recolor old photos by sampling from new photos of the same place, with some caveats (for eg. the object must have a corresponding object, etc)
I remember seeing this/such papers elsewhere. They have appeared in conference/papers for the last few years too. Here I'm suggesting untrained coloring of 'new' images from existing though, so maybe what I'm asking is a simpler problem? "Transferring colors from base (new) image to target (old) image using such and such sampling" would be how I would put my problem. The paper you link to would be more "learning to transfer colors by looking at how grayscale images transfer to color", right? Am I missing something?
If you like this, please check out Historypin[1], which is a less known Google backed project to overlay historical photographs with Google's Street View.
People rarely tear down a church, churches in many places especially in Nordic countries where often the only "real" building in town as they were initially built by Lutheran missionaries you can see the same thing from very old pictures in Iceland you'll see a village with pretty much only turf(sod) buildings and then a more or less modern (for it's time) church.
IIRC the first masonry building in Iceland was a church, won't surprise me if in many of the more remote parts of Norway and Sweden that would be the case, unlike Iceland Norway and Sweden have had at least plenty of timber and didn't had to build houses out of patches of grass...
Whilst you're completely right, it's also worth mentioning that in Norway, quite a few (a dozen? two dozen?) of old wooden stave churches were (tragically) burned down in the 80s and 90s by, amongst others, arsonist members of the black metal scene.
I don't think it holds true anymore, if you go to any store in the UK now Corn will be well maize, I'm pretty sure the American definition of corn has taken over the common British definition.
It's the same in German, probably all northern-european languages. "Korn" is a generalized term for cereal grain, and I think the best literal translation would indeed be "grain". I suspect it's related to the english "kernel".
Obviously they're not going to change over a mere 120 years, but the fact that you can see and touch the exact same spot as how many other thousands of people across the generations - that's the really interesting thing.
Some of the pictures show signs of warming (although in one of the text descriptions it's attributed to planting of trees), but there's virtually no sea level rise evident?
The global average sea level is only estimated to have risen about 20 cm (8 inches) since 1880, so it wouldn't really be noticeable in a photograph, especially on steep coasts like Norway's. Whether the photograph was taken at high vs. low tide would make a bigger difference in most cases.
Also, more trees might relate to stricter environmental laws (you can't simply take an axe and chop a random tree nowadays) and more advanced and energy efficient heating sources that use biomass briquettes, electricity and gas instead of tree logs from the nearby thicket.
Land owners can generally chop down trees as they wish; with some exceptions, which mostly don't apply in these photos.
I think there are three main reasons for the increase in woodland: 1. Less cultivated land; including less land used for grazing (eg. by sheep). 2. Other sources of heating (mostly electricity, some oil, and still some wood, but usually not taken from just outside the door; there is very little use of gas in Norway). 3. Milder climate has raised the tree line. Which of these is most significant probably varies.
Interesting. The bit that I found most noticeable in the then/now comparison was that people in the past really did not like trees :)
Every bit of human habitation was surrounded by open areas denuded of trees. It actually looked unpleasant and sterile to see the lack of trees near everything man-made. Roads, fields, home...no trees anywhere in the vicinity.
A lot of the difference in vegetation is due to climate change. I'm Norwegian and born in the beginning of October, which was first snow at the time. Now it never snows in October. You have to wait late November or early December. That sort of thing makes a lot of difference to plants.
However, trees don't necessarily grow unaided in many of the spots on those pictures. Here's a village I know: http://www.winnem.com/Assets/images/frambergkirkesaether.gif shows lots of trees, a century ago there were none there. They were planted in a big campaign around 1950-1970, in places where no tree could grow alone but a dozen together might grow up and shelter each other if tended a bit. All the schoolchildren planted and tended trees.
Global sea level has risen less than a foot in the past 100 years. Although in environments like this, I would assume isostatic rebound (https://en.wikipedia.org/wiki/Post-glacial_rebound) would play a large role in apparent local sea level changes.
It's almost certainly the tide. I'm familiar with the area around Torghatten. The high tide/low tide difference there can be ~2 meters, more than enough to explain all the variation in sealevel.
Frustrating that the images are almost-but-not-quite aligned, especially in the foreground. I think that makes it look like the towns have changed more than they have.
What would it take to get pixel perfect alignment in a big image like this? For starters, you'd have to figure out the exact lens and zoom level, and get to precisely the right spot...
I was thinking the same and concluded that creating lenses back then probably involved manual work, and were more hand made in general. So the distortion we're seeing is probably due the higher degree of imperfection in the lens sphere shape of the old lense.
But theoretically this could be corrected further using software. If you correct one picture manually, and used the same distortion as a reference for other pictures. Maybe...
Unfortunately, it's very hard to identify the exact camera position, since alignment of foreground objects can be matched from different positions at the expense of matching the original perspective. Old cameras had huge imaging plates, with low crop factors, I suspect what happens with a lot of these old/new match-ups is that the photographer is standing far from the original spot to achieve "best possible" alignment with the foreground crop - which of course screws up your perspective. You could align against the background, but then you'll have poor alignment on the foreground.
Cleaning up the crop/zoom in photoshop does not help you unless you are shooting from the exact same spot to get the same perspective.
>Axel Lindahl’s picture of Engabreen from 1889 shows the foot of the glacier, where there was only ice, glacial gravel, water and bare mountainsides in a seemingly cold and hostile landscape. Now, more than 120 years later, the valley has become far more fertile. Birch forest, shore meadows, willow thickets and marshland have established themselves, while the glacier arm has retreated far back up the mountainside.