I want to setup some industrial automation using machine vision. I know there are open source options. Is there a community that uses vision here? Is there a good place to start?
Thanks,
Craig Bossard
A couple of people have played with Tensorflow and picam's.
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I'm trying to measure height of a part. An industrial company suggested imaging, and I remembered opencv is a thing. I will have a jig and I don't need to be extremely accurate.01". I just need to look at those libraries I guess.
If you are able to control the background color and relative placement of the part, it should not be too hard to calculate the height i would think.
On Thu, Oct 12, 2017 at 11:23 AM, Craig Bossard <craigb...@gmail.com> wrote:
I'm trying to measure height of a part. An industrial company suggested imaging, and I remembered opencv is a thing. I will have a jig and I don't need to be extremely accurate.01". I just need to look at those libraries I guess.
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I've done post-processing to find height. If your camera is at a fixed height, you can calibrate it with a ruler, then just map heights to pixels in your image. Like Scott said, if you have a good contrast between part and background, you can run an edge detection filter on the image and grab the tallest edge in your area of interest.
On Thu, Oct 12, 2017 at 11:25 AM beernutz <beer...@gmail.com> wrote:
If you are able to control the background color and relative placement of the part, it should not be too hard to calculate the height i would think.
On Thu, Oct 12, 2017 at 11:23 AM, Craig Bossard <craigb...@gmail.com> wrote:
I'm trying to measure height of a part. An industrial company suggested imaging, and I remembered opencv is a thing. I will have a jig and I don't need to be extremely accurate.01". I just need to look at those libraries I guess.
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Thank you for being more helpful than i was Bailey. I tend to be overly general with my answers. I will work on that.
On Thu, Oct 12, 2017 at 11:28 AM, Bailey Steinfadt <runne...@gmail.com> wrote:
I've done post-processing to find height. If your camera is at a fixed height, you can calibrate it with a ruler, then just map heights to pixels in your image. Like Scott said, if you have a good contrast between part and background, you can run an edge detection filter on the image and grab the tallest edge in your area of interest.
On Thu, Oct 12, 2017 at 11:25 AM beernutz <beer...@gmail.com> wrote:
If you are able to control the background color and relative placement of the part, it should not be too hard to calculate the height i would think.
On Thu, Oct 12, 2017 at 11:23 AM, Craig Bossard <craigb...@gmail.com> wrote:
I'm trying to measure height of a part. An industrial company suggested imaging, and I remembered opencv is a thing. I will have a jig and I don't need to be extremely accurate.01". I just need to look at those libraries I guess.
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Eh, mine's still pretty generic because I'm at work. I can help out more at electronics club next month or an open house after the art show.
On Thu, Oct 12, 2017 at 11:31 AM beernutz <beer...@gmail.com> wrote:
Thank you for being more helpful than i was Bailey. I tend to be overly general with my answers. I will work on that.
On Thu, Oct 12, 2017 at 11:28 AM, Bailey Steinfadt <runne...@gmail.com> wrote:
I've done post-processing to find height. If your camera is at a fixed height, you can calibrate it with a ruler, then just map heights to pixels in your image. Like Scott said, if you have a good contrast between part and background, you can run an edge detection filter on the image and grab the tallest edge in your area of interest.
On Thu, Oct 12, 2017 at 11:25 AM beernutz <beer...@gmail.com> wrote:
If you are able to control the background color and relative placement of the part, it should not be too hard to calculate the height i would think.
On Thu, Oct 12, 2017 at 11:23 AM, Craig Bossard <craigb...@gmail.com> wrote:
I'm trying to measure height of a part. An industrial company suggested imaging, and I remembered opencv is a thing. I will have a jig and I don't need to be extremely accurate.01". I just need to look at those libraries I guess.
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GRIP can export this pipeline as a python file which then is really easy to supply frame and get result out. I would recommend doing some hand calibration to establish a pixel value -> length. I'd ignore all math and just use some know calibration points to figure it out. Again, this requires some good contrast so that your HSV / HSL filter can be setup properly.The basic workflow will be to take a frame, filter by color / light (HSV or HSL filter), erode (makes things smaller, eliminates small noise), dilate (makes things bigger, restores the items remaining from the erode), find contours, possibly fitler contours, publish data.I'll make it more specific for you then.I think I'd still recommend using GRIP. It provides a nice wrapper around OpenCV and gives you nice sliders to play with.Ray Scheufler
On Thu, Oct 12, 2017 at 11:33 AM, Bailey Steinfadt <runne...@gmail.com> wrote:
Eh, mine's still pretty generic because I'm at work. I can help out more at electronics club next month or an open house after the art show.
On Thu, Oct 12, 2017 at 11:31 AM beernutz <beer...@gmail.com> wrote:
Thank you for being more helpful than i was Bailey. I tend to be overly general with my answers. I will work on that.
On Thu, Oct 12, 2017 at 11:28 AM, Bailey Steinfadt <runne...@gmail.com> wrote:
I've done post-processing to find height. If your camera is at a fixed height, you can calibrate it with a ruler, then just map heights to pixels in your image. Like Scott said, if you have a good contrast between part and background, you can run an edge detection filter on the image and grab the tallest edge in your area of interest.
On Thu, Oct 12, 2017 at 11:25 AM beernutz <beer...@gmail.com> wrote:
If you are able to control the background color and relative placement of the part, it should not be too hard to calculate the height i would think.
On Thu, Oct 12, 2017 at 11:23 AM, Craig Bossard <craigb...@gmail.com> wrote:
I'm trying to measure height of a part. An industrial company suggested imaging, and I remembered opencv is a thing. I will have a jig and I don't need to be extremely accurate.01". I just need to look at those libraries I guess.
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Is there a camera I should start with?
On Thu, Oct 12, 2017 at 11:41 AM Ray Scheufler <dr.bob....@gmail.com> wrote:
GRIP can export this pipeline as a python file which then is really easy to supply frame and get result out. I would recommend doing some hand calibration to establish a pixel value -> length. I'd ignore all math and just use some know calibration points to figure it out. Again, this requires some good contrast so that your HSV / HSL filter can be setup properly.The basic workflow will be to take a frame, filter by color / light (HSV or HSL filter), erode (makes things smaller, eliminates small noise), dilate (makes things bigger, restores the items remaining from the erode), find contours, possibly fitler contours, publish data.I'll make it more specific for you then.I think I'd still recommend using GRIP. It provides a nice wrapper around OpenCV and gives you nice sliders to play with.Ray Scheufler
On Thu, Oct 12, 2017 at 11:33 AM, Bailey Steinfadt <runne...@gmail.com> wrote:
Eh, mine's still pretty generic because I'm at work. I can help out more at electronics club next month or an open house after the art show.
On Thu, Oct 12, 2017 at 11:31 AM beernutz <beer...@gmail.com> wrote:
Thank you for being more helpful than i was Bailey. I tend to be overly general with my answers. I will work on that.
On Thu, Oct 12, 2017 at 11:28 AM, Bailey Steinfadt <runne...@gmail.com> wrote:
I've done post-processing to find height. If your camera is at a fixed height, you can calibrate it with a ruler, then just map heights to pixels in your image. Like Scott said, if you have a good contrast between part and background, you can run an edge detection filter on the image and grab the tallest edge in your area of interest.
On Thu, Oct 12, 2017 at 11:25 AM beernutz <beer...@gmail.com> wrote:
If you are able to control the background color and relative placement of the part, it should not be too hard to calculate the height i would think.
On Thu, Oct 12, 2017 at 11:23 AM, Craig Bossard <craigb...@gmail.com> wrote:
I'm trying to measure height of a part. An industrial company suggested imaging, and I remembered opencv is a thing. I will have a jig and I don't need to be extremely accurate.01". I just need to look at those libraries I guess.
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Oh, and if your company is paying for it, we use a light curtain here to measure plant height as they run down a conveyor. Bunch of emitters on one side, corresponding sensors on the other. When something passes through, you take the height of the last sensor up the bar that turned off as the object went through.
On Thu, Oct 12, 2017 at 1:12 PM Bailey Steinfadt <runne...@gmail.com> wrote:
Do you need video or stills? How fast do you need a height returned? How are you triggering your image capture?
On Thu, Oct 12, 2017 at 11:33 AM Bailey Steinfadt <runne...@gmail.com> wrote:
Eh, mine's still pretty generic because I'm at work. I can help out more at electronics club next month or an open house after the art show.
On Thu, Oct 12, 2017 at 11:31 AM beernutz <beer...@gmail.com> wrote:
Thank you for being more helpful than i was Bailey. I tend to be overly general with my answers. I will work on that.
On Thu, Oct 12, 2017 at 11:28 AM, Bailey Steinfadt <runne...@gmail.com> wrote:
I've done post-processing to find height. If your camera is at a fixed height, you can calibrate it with a ruler, then just map heights to pixels in your image. Like Scott said, if you have a good contrast between part and background, you can run an edge detection filter on the image and grab the tallest edge in your area of interest.
On Thu, Oct 12, 2017 at 11:25 AM beernutz <beer...@gmail.com> wrote:
If you are able to control the background color and relative placement of the part, it should not be too hard to calculate the height i would think.
On Thu, Oct 12, 2017 at 11:23 AM, Craig Bossard <craigb...@gmail.com> wrote:
I'm trying to measure height of a part. An industrial company suggested imaging, and I remembered opencv is a thing. I will have a jig and I don't need to be extremely accurate.01". I just need to look at those libraries I guess.
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Now that is my kind of solution! Simple and elegant!
On Thu, Oct 12, 2017 at 1:15 PM, Bailey Steinfadt <runne...@gmail.com> wrote:
Oh, and if your company is paying for it, we use a light curtain here to measure plant height as they run down a conveyor. Bunch of emitters on one side, corresponding sensors on the other. When something passes through, you take the height of the last sensor up the bar that turned off as the object went through.
On Thu, Oct 12, 2017 at 1:12 PM Bailey Steinfadt <runne...@gmail.com> wrote:
Do you need video or stills? How fast do you need a height returned? How are you triggering your image capture?
On Thu, Oct 12, 2017 at 11:33 AM Bailey Steinfadt <runne...@gmail.com> wrote:
Eh, mine's still pretty generic because I'm at work. I can help out more at electronics club next month or an open house after the art show.
On Thu, Oct 12, 2017 at 11:31 AM beernutz <beer...@gmail.com> wrote:
Thank you for being more helpful than i was Bailey. I tend to be overly general with my answers. I will work on that.
On Thu, Oct 12, 2017 at 11:28 AM, Bailey Steinfadt <runne...@gmail.com> wrote:
I've done post-processing to find height. If your camera is at a fixed height, you can calibrate it with a ruler, then just map heights to pixels in your image. Like Scott said, if you have a good contrast between part and background, you can run an edge detection filter on the image and grab the tallest edge in your area of interest.
On Thu, Oct 12, 2017 at 11:25 AM beernutz <beer...@gmail.com> wrote:
If you are able to control the background color and relative placement of the part, it should not be too hard to calculate the height i would think.
On Thu, Oct 12, 2017 at 11:23 AM, Craig Bossard <craigb...@gmail.com> wrote:
I'm trying to measure height of a part. An industrial company suggested imaging, and I remembered opencv is a thing. I will have a jig and I don't need to be extremely accurate.01". I just need to look at those libraries I guess.
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I would be into that. I need 0.01" resolution. Could I get that? Stills. Can take a minute if I can run it unattended. Was going to use a pick and place with a jig to set the part. I don't have any of the stuff currently.
On Thu, Oct 12, 2017 at 1:29 PM beernutz <beer...@gmail.com> wrote:
Now that is my kind of solution! Simple and elegant!
On Thu, Oct 12, 2017 at 1:15 PM, Bailey Steinfadt <runne...@gmail.com> wrote:
Oh, and if your company is paying for it, we use a light curtain here to measure plant height as they run down a conveyor. Bunch of emitters on one side, corresponding sensors on the other. When something passes through, you take the height of the last sensor up the bar that turned off as the object went through.
On Thu, Oct 12, 2017 at 1:12 PM Bailey Steinfadt <runne...@gmail.com> wrote:
Do you need video or stills? How fast do you need a height returned? How are you triggering your image capture?
On Thu, Oct 12, 2017 at 11:33 AM Bailey Steinfadt <runne...@gmail.com> wrote:
Eh, mine's still pretty generic because I'm at work. I can help out more at electronics club next month or an open house after the art show.
On Thu, Oct 12, 2017 at 11:31 AM beernutz <beer...@gmail.com> wrote:
Thank you for being more helpful than i was Bailey. I tend to be overly general with my answers. I will work on that.
On Thu, Oct 12, 2017 at 11:28 AM, Bailey Steinfadt <runne...@gmail.com> wrote:
I've done post-processing to find height. If your camera is at a fixed height, you can calibrate it with a ruler, then just map heights to pixels in your image. Like Scott said, if you have a good contrast between part and background, you can run an edge detection filter on the image and grab the tallest edge in your area of interest.
On Thu, Oct 12, 2017 at 11:25 AM beernutz <beer...@gmail.com> wrote:
If you are able to control the background color and relative placement of the part, it should not be too hard to calculate the height i would think.
On Thu, Oct 12, 2017 at 11:23 AM, Craig Bossard <craigb...@gmail.com> wrote:
I'm trying to measure height of a part. An industrial company suggested imaging, and I remembered opencv is a thing. I will have a jig and I don't need to be extremely accurate.01". I just need to look at those libraries I guess.
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I have images. How do I post them?
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Wow... Hey... How about I make November electronics night all about machine vision. We can use your project as a use case to explore. There's a lot of things that will change depending on context, and this is an interesting example. (And that gives us time after this art show to do some research!)
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