image sensors
Lee Marshall
Posts: 106
one good use for the prop i saw right from the start was with AI.
specifically neural net simulation/computer vision.
i wanna try something that involves a camera, however, i cant find any image sensors anywhere that are ok to work with.
im looking for:
low res - VGA/QVGA sort of thing
system on chip - a microcontroller built into it so i dont have to connect like 1000 x/y wires.
serial interface - mechanically less to go wrong, less to wire up, simplicity to interface.
low pin count - nothing surface mount, id like to keep it below 40 pins
the closest i have come to something like this is the REALLY low res cameras in optical mice, which are designed to be for a mouse-on-a-chip with ps/2 interface, and pins for connecting the mouse buttons.
the only cameras i can find are the ones with the composite video output.
have any of you people encountered such a device??
maybe something that can be extracted from something i already have.
Lee.
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I hear and I forget. I see and I remember. I do and I understand
-Confucius
Post Edited (Mr Crowley) : 10/16/2007 11:05:05 PM GMT
specifically neural net simulation/computer vision.
i wanna try something that involves a camera, however, i cant find any image sensors anywhere that are ok to work with.
im looking for:
low res - VGA/QVGA sort of thing
system on chip - a microcontroller built into it so i dont have to connect like 1000 x/y wires.
serial interface - mechanically less to go wrong, less to wire up, simplicity to interface.
low pin count - nothing surface mount, id like to keep it below 40 pins
the closest i have come to something like this is the REALLY low res cameras in optical mice, which are designed to be for a mouse-on-a-chip with ps/2 interface, and pins for connecting the mouse buttons.
the only cameras i can find are the ones with the composite video output.
have any of you people encountered such a device??
maybe something that can be extracted from something i already have.
Lee.
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
I hear and I forget. I see and I remember. I do and I understand
-Confucius
Post Edited (Mr Crowley) : 10/16/2007 11:05:05 PM GMT
Comments
Finding the array is the easy bit.
Graham
How about Texas Instruments TC255P?
CCD in an 8 pin DIP 324 x 243 pixels.
Ian
:- Politicians are people who, when they see light at the end of the tunnel,
Order more tunnel.
is this what all ccds are like??
i am really looking for something in the CMOS image sensor variety.
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
I hear and I forget. I see and I remember. I do and I understand
-Confucius
Some sensors have in built ADC and will output via some protocol the data for each pixel. Others will output a set of pulses, the height of which determines the light incident on the pixel, you then need to use a ADC to convert this to digital, not a problem really but a few more components, depending on the sensor you may also need to provide various clocks. Sometimes you may also want to add a sample and hold so extend the pulses so that your ADC has time to read them.
Graham
http://forums.parallax.com/forums/default.aspx?f=25&m=212118&g=217633#m217633
because there were links to hacked interfacing details using serial communications.
But, I haven't had time to play with it yet...