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Augmented HDR Vision For Welders (And Others)
jehan60188 writes about a research project (involving Steve Mann) that combines a welding helmet and realtime HDR image processing to give welders a clear view of what they're working on. From the article: "In this demonstration, we present a specialized version of HDR imaging (use of multiple differently exposed input images for each extended-range output image), adapted for use in electric arc welding, which also shows promise as a general-purpose seeing aid. TIG welding, in particular, presents an extremely high dynamic range scene (higher than most other welding processes). Since TIG welding requires keen eyesight and exact hand-to-eye coordination (i.e. more skill and more visual acuity than most other welding processes), being able to see in such extreme dynamic range is beneficial to welders and welding inspectors. ... We present HDRchitecture as either a fixed camera system (e.g. for use on a tripod), or as a stereo EyeTap cybernetic welding helmet that records and streams live video from a welding booth to students or observers, nearby or remote. By capturing over a dynamic range of more than a million to one, we can see details that cannot be seen by the human eye or any currently existing commercially available cameras. We also present a highly parallelizable and computationally efficient HDR reconstruction and tonemapping algorithm for extreme dynamic range scene. In comparison to most of the existing HDR work, our system can run in real-time, and requires no user intervention such as parameters fine tuning. ... Our algorithm runs at an interactive frame rate (30 fps) and also enables stereoscopic vision. Additionally, a hardware implementation, which uses FPGAs, will be presented. The initial hardware configuration comprises an Atlys circuitboard manufactured by Digilent Inc., which is small enough to fit inside a large shirt pocket. The circuit board includes two HDMI camera inputs, one being used for the left eye, and the other for the right eye, as well as HDMI outputs fed back to the left and right eyes, after processing of the video signals. The circuit board facilitates processing by way of a Xilinx Spartan 6, model LX45 FPGA."
The demonstration video is pretty cool, and you can read about the FPGA and details of the HDR algorithm in the research paper.
It is an .MP4
- you are now breathing deliberately -
That is one bad-ass looking welding helmet!
Being able to see what you're welding on is just a pleasant side effect.
An enigma, wrapped in a riddle, shrouded in bacon and cheese
Have gnu, will travel.
When can I buy one? This would make my welding so much easier
Before you buy one I recommend you find out what the minimum, maximum and typical latency is.
High latency would make welding harder not easier. Plus give some people motion sickness...
I've recently picked up a Canon 5D3....and I'm currently playing with that and an open source HDR application Luminance .
Pretty cool stuff.....but just get a camera that will bracket exposure shots for you, and then put them together with something like Luminance, GIMP, Photoshop....etc.
I'm just starting to play with stills for now, but looking to see how to do it with video later....this isn't just for arc welding.
Light travels faster than sound. This is why some people appear bright until you hear them speak.........
From experience, I agree with this.
I've used those "auto-shielding" "solar" masks, and they are quite an improvement since you can "aim" safely, but being able to see precisely what you are doing as you do the actual welding makes me fantasize working with this new hardware.
As a welder I can say: Holy cats! I want that... Talk about making my life easier!
I really like seeing applications for image fusion like this. I think we'll see more of them in the future given how cheap HD cameras and FPGA are becoming. There's no reason why I couldn't take an array of cameras with different filters and fuse the outputs together into a single image. It's better than the Preditor-Alien vision (no cycling required)!
Take these guys for instance. They're fusing thermal and visible cameras outputs together in realtime.
http://imagizellc.com/html/applications/fusion.html
How long do you think it will be before all of done on a single sensor die?
TIG is certainly a lot more difficult than SMAW, (stick or MIG), but I'd consider OA the most difficult, depending on what you're doing with it. TIG welds, OA does all kinds of crazy stuff.
flame shrinking, flame bending, heating, brazing, hard facing, soldering, cutting, etc...AND welding
That said, hardly anyone (professionally) uses OA for much besides cutting and brazing and you generally don't need a strong shade to do it so visibility is already pretty good.
I took a welding class in college as an elective for my degree, and it was an excellent idea. I've used it a few times, and it served me quite well.
That said, this is awesome! I haven't had the pleasure of using an auto-darkening helmet yet, but I can already see the appeal of this device.
With an ADH, you go from normal vision to "dark vision". You can see the material, the rod and the weld, but nothing else around you. You are effectively oblivious to anything else around you, such as your sparks setting something nearby on fire, or someone coming up behind you. This means you have to stop periodically and check your surroundings.
With this helmet, you have all of that, plus "normal" vision, and can now see everything around you. You'll have greater awareness of your work, and more importantly, you'll be able to see when someone-or something-is coming up behind you. In the construction business, this is a very necessary thing.
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