Re: cmos image sensor to usb

On Sep 28, 7:42 am, "momaley79" <momale...@xxxxxxxxx> wrote:

this:http://www.aurora-optical.com/modules/CM036U%20Preliminary
%208-8-07.pdf
from Aurora Optical, but I want to be able to put the sensor on a flex
circuit and have the processor/USB chip behind the sensor. Can anybody

Webcams are built as essentially two-chip solutions. Both chips are
application-specific; one is the image sensor, and the other is an
"image processor". ST for instance makes both classes of part. The
image processor has hardware that acquires the image sensor data,
processes it (basically, handles the fact that it's really a
monochrome sensor with a Bayer or similar filter on top of it), then
compresses to JPEG data one stripe at a time. It also has the USB
magic in it.

It is fairly challenging to connect a raw image sensor directly to a
general-purpose microcontroller. High-speed interfacing, precision
timing and a lot of memory are required, because if you're doing
everything in software you have no time to acquire-convert-compress a
stripe at a time; you have to grab the whole raw image, process it en
bloc, and compress it en bloc.

.

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