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Topic: Upload your random pictures (part 4)
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Randy Stankey
Film God

Posts: 6539
From: Erie, Pennsylvania
Registered: Jun 99
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posted 07-27-2019 06:08 PM
A person could take a photograph using a camera with a known focal length lens and use geometry to figure out the size and location of objects in the picture.
Once, a guy I knew needed to pinpoint a location of an object in an old photo. I blew up the negative, full frame so that I could measure the sizes and relative positions of several objects in the picture then I did the math.
If I know that the man in the picture is a certain height in real life then I measure his height in the photograph and I know that the photo was taken through a 50 mm lens I can calculate how far away from the camera he was standing.
Do this with a couple of more objects or people in the photo then triangulate and you know where the camera (and photographer) must have been standing when the photo was taken.
Once you know that, the size and location of any other object in the picture can be calculated with pretty good accuracy. I was even able to use Google Earth to pinpoint the exact location on the globe where the photographer and all the other people in the picture were standing when the photo was taken, some twenty years prior.
Given that every smart phone has built-in GPS, the work that I did with a ruler, a compass and a calculator which took an evening's worth of effort can probably be done, nowadays, in a few minutes.
Using the gizmo that Bobby describes, it might be done in seconds.
Point is that, if you can get a clear photo, the sizes of those patches can be figured out using little more than high school math.
Bobby knows the sizes of billboards, practically, by heart. He could probably figure it out by scribbling on the back of a pizza box.
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Randy Stankey
Film God

Posts: 6539
From: Erie, Pennsylvania
Registered: Jun 99
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posted 07-29-2019 04:24 AM
LED signs and billboards suck.
I agree with Leo. They are often too bright. There is one place that I used to drive by, on the way to work, where an LED sign shined directly into the windows of a neighboring house. A lawsuit was filed and, in the end, the business had to shut the sign off after 10:00 p.m.
Also, most LED signs or billboards change their message before people have a chance to read them. How many times have you driven by a business with an LED sign and seen a message like
[flash-flash-flash] ...STOP IN... [flash-flash-flash] [spin] ...AND CHECK OUT... [spin] [crawl] ...OUR SELECTION OF... [crawl]
There isn't enough time to read the entire message before you drive by. Not to mention the stupid motion graphics and effects that make it virtually impossible to decipher the message in the first place.
Practically the only time you can read the messages on LED signs is when you are stopped at a traffic light where there is one in view of the intersection.
When it comes to billboards, not only is there the problem of them changing before people can read them but, for some reason, the design of the ads makes it impossible to read.
I don't know how many times I've seen a billboard emblazoned with a banner that says something like, "The BEST (something) in town!" but you can't read the name of the business because it's written in small print, tucked way down in the corner of the sign.
LED signage makes it easy for idiots to create indecipherable, unreadable, illegible messages while advertising companies pocket the money.
In the end, it does nothing more than fill the landscape with ugly, distracting clutter that nobody can even read.
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