On Sun, 2009-01-04 at 00:05 -0500, Stephen Wille Padnos wrote: > Kirk Wallace wrote: > > >[snip] > > > >A caveat of frame-grabbing, to me at least, is that this implies using > >video, and inexpensive video really ..... . For my application, the only > >additional cost was $30.00 for an eBay digital camera that has much > >higher resolution with great exposure and color control. To me, video is > >only good for full motion applications and requires at least an order of > >magnitude more money to get decent results. I would love to see an open > >source HD video project. The Elphel > >http://www.elphel.com/index_en.html > > > >seems to try to be open and has very good image quality. > > > > > They're quite open, and the cameras are an excellent deal. They even > give you a discount if you intend to contribute back to the project > (hosted on sourceforge, complete with FPGA code and source for all the > applications that run on the camera). > > The resolution is great, but the quality isn't that good. I say this > from the perspective of someone looking for photographic images rather > than inspection, so they're likely fine for machine use. I haven't > tested the latest generation, I have a 333, not a 353/363. Note that > these cameras have no way to control iris, focus, or zoom, even if you > use a lens that has the right motors.
I saw some sample pictures on a forum from a person that made videos that went along with bicycle rollers that presented simulated bike tours. The pictures were very good. They were in full sun and were processed, not raw. I would rate the samples as pro-sumer quality, but I am not an expert. I wounder, being open source if it might be possible to add lens functions? > POE (Power Over Ethernet) is a great feature, but it requires hardware > that many people don't have. I couldn't get the camera to work with the > POE power supply they provided, but luckily it did work with the switch > I bought for testing. > > Throughput isn't great over the network, especially at higher > resolutions (I have the 3 or 5 mpix model, it looks like they never > released a board based on the 9 MP sensor). It can take several seconds > to transfer a full size image. Video (compressed) at high resolution > gets maybe 1-2 frames/second. I thought the frame rates were much higher. I was thinking the Elphel and a fast notebook might make a decent poor man's Red: http://www.red.com/ > They're cool device for sure, but they may not be ideally suited to this > application. Oh, they also cost around $850 with the GPL discount :) > > - Steve I haven't lusted over digital video for a quite a while and since I spend most of my discretionary money on CNC's, this is out of my league. ------------- Kirk http://www.wallacecompany.com/machine_shop/ ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
