Good hobbyist VGA camera module?

Jul 16, 2008 3 Replies

Can someone suggest a reasonably-priced monochrome camera module (I can live with color but don't need it), VGA-resolution camera module with some kind of buffer and low-speed interface; SPI, I2C, RS232, etc. SPI would be my preference.



I need two of them, and perhaps two spares, to build a demo platform for a student to work with very simple stereoscopic machine vision. Currently he is working with a PC and two USB webcams but he wants a smaller system to go in a vehicle without requiring huge batteries, plus he doesn't want the overhead of a USB stack. We've put together a general block diagram for his circuit and have good candidates for most of the components, but the cameras are a sticky point.



I really want uncompressed or lossless data (preferably de-Bayerized if color) - we don't really want to deal with JPEG artifacts. 0.5-1fps is fine.



All the cellphone camera modules I've looked at appear to be bare image sensors requiring a real-time DMA port to acquire the data. The Ovis-based hobbyist solutions like the C328R from are pretty much what I want, except for the unavoidable JPEG compression.



A $50 price point @ qty 5 is fairly sweet - obviously cheaper would be better.



Thoughts?



Gracias.



There are almost no serial interface cams out there - The CMUCam and the one listed above appear to be all that's available. I needed one for a forthcoming project & ended up designing my own using a low-res sensor and some carefully crafted assembler code to catch the data on an ARM processor. I'm planning on turning this into a product in case there might be a small market out there - provisional details here :

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May not be enough resolution for your app though.

I've played a bit with that module. Take a look at the command set in the user manual and you'll find that the imaging mode can be set to 2-,

4-, and 8-bit grayscale as well as to 12- and 16-bit color and to JPEG.

Not quite at your price point, or preferred interface, and there is a bit of song and dance through their protocol to contend with but it really does work.

Rich Webb Norfolk, VA

a low-res sensor and some

l market out there -

I was hoping for VGA resolution, since we're currently using QCIF webcams and wanting an upgrade... the 30K buffer is a bit limiting, too. Can your device be configured to acquire a 2bpp grayscale image and send it to me verbatim, preferably over SPI? What's the price likely to be?

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