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. 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. 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 ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
