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Ron Patey
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New How To ... Please
18 Replies

HI: I have ordered 2 Stonymen and am now analyzing what I need to make a 3D pair. I have taken downsampling of some pictures and the full resolution is a must. Below that, there is too much of a jump…Continue

Tags: speed, 3D

Started this discussion. Last reply by Ron Patey Feb 6, 2013.

 

Ron Patey's Page

Latest Activity

Irene Donati commented on Ron Patey's blog post youtube movie
"Hi, how long does it take you to acquire an image from the centeye? thanks in advance for your kind reply Best regards Irene Donati"
Mar 14, 2014
Geoffrey L. Barrows commented on Ron Patey's blog post EYE results, 32 levels reduced to 16 levels for the LCD screen.
"It is interesting you used two different resistors to equalize the values. That would work, but as the resistance gets lower so could the gain. Have you tried adding a constant offset to the values from one chip?"
May 30, 2013
Ron Patey posted a blog post

youtube movie

I finally got a good LED strip to place behind the cameras, 300ma at 3.5volts. Makes a lot of difference in the calibration.I am just playing with simple-solutions to 3D right now. It really is intriguing trying to figure out a non-moving picture way of getting 3D distances. It is really easy with a single item like a pencil on a plain background. But that's cheating. My attempt at subracting the left and right eye, then showing only the pixels with the same +/-3 of 16 brightness values...…See More
May 13, 2013
Ron Patey posted a blog post

EYE results, 32 levels reduced to 16 levels for the LCD screen.

SO>>> the LCD screen is 160x128, so some of it is not used. Movie updates are about 8 per second.. only EYE number 1 is shown. The text is my diagnostic readout.The actual pixels are read using the amplifier on the Stonyman at max gain. The PHI times are 1us high/2.5us low (before A/D). The A/D is 8 bits 450ns at 2volt…See More
May 11, 2013
Ron Patey replied to Ron Patey's discussion New How To ... Please
"I am still replying to myself. RE the lighting... I have added two XLamp LED's to my board, with a D/A converter driving a power FET to create a DC controlled light. The two XLamps are red to keep the volts low, and are almost too bright…"
Feb 6, 2013
Ron Patey replied to Ron Patey's discussion New How To ... Please
"NEXT installment: I am getting close to writing the first test program. Still have to order the boards.   I have worked out the logic of scanning to match my concept of following about 10 objects on two sensors in 3D. The image must be kept in…"
Jan 22, 2013
Geoffrey L. Barrows replied to Ron Patey's discussion New How To ... Please
"You are correct in your interpretation of a Stonyman pixel- this is their logarithmic nature."
Jan 21, 2013
Geoffrey L. Barrows replied to Ron Patey's discussion New How To ... Please
"This is one aspect of the "direct stare" nature of the Stonyman pixels- when you sample them you get the pixel value at that exact time instance. Linear pixels integrate light over a fixed interval so they are somewhat immune to that e.g.…"
Jan 21, 2013
Geoffrey L. Barrows replied to Ron Patey's discussion New How To ... Please
"That looks like a typical image you can use for simulation. The contrast coming off the Stonyman chips, when displayed in a pure raw form, can appear washed out due to the logarithmic pixel nature. To help with the display we often rescale the…"
Jan 21, 2013
Xiao replied to Ron Patey's discussion New How To ... Please
"OPV382, I used that before, I think it is not "not enough particles to reflect" but the fact is that OPV382 is only 1 mW or something like that. Also it is 4 degree, most laser diode is mrad...   OPV382 is using VCEL technology unlike…"
Jan 21, 2013
Ron Patey replied to Ron Patey's discussion New How To ... Please
"HI: replying to myself again. It occured to me from looking at the stoneyman datasheet that the pixels vary less by a simple subtraction of a bright sample reference, but by a multiplication factor of 'sensitivity' of the pixel. My micro…"
Jan 20, 2013
Ron Patey replied to Ron Patey's discussion New How To ... Please
"HI: just looked at Optek site. A 4 degree version is out as well. digikey 365-1889-ND "
Jan 20, 2013
Ron Patey replied to Ron Patey's discussion New How To ... Please
"HI: the laser diode is About $6. But the ones available are 6 degrees, not 2. Seven years ago I was designing a tubidity probe. The laser beam was too thin believe it or not.. Not enough particles to reflect back! Optek OPV382. Digikey 365-1146-ND."
Jan 20, 2013
Xiao replied to Ron Patey's discussion New How To ... Please
"Hi, ur project really interesting! Pls keep us update of your project progress and status, I would really keen to follow your project. BTW, where do u find cheap 2 degree beam laser diode as you mentioned?"
Jan 19, 2013
Ron Patey replied to Ron Patey's discussion New How To ... Please
"HI: I wonder if I should keep adding to this? My thoughts this morning... So. The eye sensors are not fooled by flickering lamps. In fact they will see the 60hz especially from LED room lighting. I think my two forward looking LED's will have…"
Jan 19, 2013
Ron Patey replied to Ron Patey's discussion New How To ... Please
"HI: Replying to myself again. Is the attached bmp reduced to 3 bit intensity a typical image? Remember that I will take a whitescale image at first development to subtract from the image. Would I have to do this for whitescale and darkscale?…"
Jan 18, 2013

Profile Information

Hometown
Georgetown, Ontario, Canada
About me
Retired: Lots of available time.
What are your interests related to embedded eyes / vision?
Machine Processing
Tell us about your technical background
Electronic Engineer: R&D for 40 years: RF, Displays, Sensors, Security Systems, Radio Remotes for Industry, Learning Software for open pit mine Shovel and BoMines, Multitasking Kernels, Written in C, but Love Assembler...it runs circles around C in small apps.
Building (continuous Process) Robots as hobby.
Just finished array of 9 racoon detectors to protect my lawn, RF linked... then I get out my pellet gun.
Technical interest
optics, image sensor chips, vision hardware, image processing, ground robotics, underwater robotics, sensor networks, art or music, other
Website
http://pateycanada.com

HI: Late March and I finally got the 'eyes' and ordered the PCB's. The manufacturer complained about the 6 thou spacing... so delays. BUT: finally built! I have also developed a PC program to test out recognition ideas. It works well enough and I have quickly come to the conclusion that light/dark gradients contain the most information for recognition. I will now do scaling on this to create the scale containing just enough information... the number of pixels to enter into the gradient formula is the key to determining the scale of objects that are noteworthy.

Ron Patey's Blog

youtube movie

I finally got a good LED strip to place behind the cameras, 300ma at 3.5volts. Makes a lot of difference in the calibration.

I am just playing with simple-solutions to 3D right now. It really is intriguing trying to figure out a non-moving picture way of getting 3D distances. It is really easy with a single item like a pencil on a plain background. But that's cheating. My attempt at subracting the left and right eye, then showing only the pixels with the same +/-3 of 16 brightness…

Continue

Posted on May 13, 2013 at 9:38pm — 1 Comment

EYE results, 32 levels reduced to 16 levels for the LCD screen.

SO>>> the LCD screen is 160x128, so some of it is not used. Movie updates are about 8 per second.. only EYE number 1 is shown. The text is my diagnostic readout.

The actual pixels are read using the amplifier on the Stonyman at max gain. The PHI times are 1us high/2.5us low (before A/D). The…

Continue

Posted on May 11, 2013 at 3:21pm — 1 Comment

Comment Wall (1 comment)

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