hdersch

4 ms·

1.
by hdersch 5mo ago
I wonder how this compares to purely vision-based systems which use nothing but the images themselves for stabilization. Here are some quite old results of stabilization using image-based 3d-reconstruction of the scene which I wrote more th
2.
by hdersch 8mo ago
"Viewsheds" of any location can be calculated and matched with photographs using "GeoImageViewer", an application I wrote a couple of years ago. Any feature in the photo can be interactively identified in a mapview and v
3.
by hdersch 1y ago
Atmospheric refraction is due to the vertical gradients of atmospheric pressure, temperature, and composition of the atmosphere, all of which are usually not precisely known, and which vary with time, so one gets larger lines of sights at c
4.
by hdersch 1y ago
"Viewsheds" of any location can be calculated and matched with photographs using "GeoImageViewer", an application I wrote a couple of years ago. Any feature in the image can be interactively identified in a mapview and v
5.
by hdersch 2y ago
What is definitely wrong in this article is the claim, that only bears eat living prey. Also wolves do that. There are many cases where wolves attacked animals (cows, sheep, deer), and as soon as those are immobilized, start feeding. Someti
6.
by hdersch 4y ago
Combined cycle power plants take heat at 2000°C using a combination of gas and steam turbines. Their conversion efficiency to electric power is 52%, see Wikipedia. This is proven technology, at least 30 years old, and quite a few of those e
7.
by hdersch 5y ago
I mentioned GeoImageViewer in a reply above. It contains several algorithms to determine the location of a landscape photo given some control points selected on a map. It is also able to determine lens parameters (fov, distortions,...). ht
8.
by hdersch 5y ago
GeoImageViewer, not an overlay but side-by-side view of photograph and maps. Clicking the image anywhere (not just precalculated pois) shows corresponding location in map and vice-versa. https://hdersch.github.io/
9.
by hdersch 5y ago
Nernst sold the patent in 1902 for 1 Million Mark to AEG, which corresponds to roughly 10 Million EUR today. It was one of the highest valued patents at the time, and is still quite impressive today.
10.
by hdersch 5y ago
A comparison with one of the many SIMD-mathlibraries would have been fairer than with plain libm. Long time ago I wrote such a dual-platform library for the PS3 (cell-processor) and x86 architecture (outdated, but still available here [1]).
11.
by hdersch 5y ago
There are many projects displaying georeferenced photographs using Leaflet, which usually work via precalculated hotspots in image- and mapview. Here's a project that uses photogrammetry to link not just some but all points. Clicking t
12.
Show HN: Link Photographs to maps, find any corresponding location(hdersch.github.io)
2 points by hdersch 6y ago|0 comments