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Viewing 15 posts - 1 through 15 (of 55 total)
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  • mkaszuba
    Participant

    Looks like a calibration issue. Where you able to get the green disc to show up during the tie point acquisition process?

    in reply to: Terrian model? #124106
    mkaszuba
    Participant

    Okay, I was able to get a TIFF file from a friend of mine that contained the DEM data.
    I then used the python script form SIKI (see page two) https://arsandbox.ucdavis.edu/forums/topic/dem-help/page/2/ to convert it to a grid file.
    I tied the grid file to the 7 key and the tool displays the depth data as prescribed.
    How do I now present the actual jpg image once the sand has been moved around so that table now displays the actual satellite image of the area?

    FYI: good info on DEM data file types: https://library.carleton.ca/help/dem-formats

    in reply to: Display aerial or GIS layers #124107
    mkaszuba
    Participant

    What about displaying the DEM image using a key, then moving the sand around, then using another key to display the aerial image over the sand? How would one do the second part?

    in reply to: Terrian model? #124104
    mkaszuba
    Participant

    That is the tool listed but it seems to give me a KML file. do I then bring the kml file into QGIS to export a DEM in Tif format?

    in reply to: Terrian model? #124083
    mkaszuba
    Participant

    Where does one go to get a DEM map of my area? The tool listed above by sharned has been updated and I am not sure where to start to find DEM data.

    in reply to: Got the Blues… #124052
    mkaszuba
    Participant

    Sounds to me like you at a “depth” problem. Change the last value on the first line of your BoxLayout.txt file. The more negative the number, the further away from the camera your “water line” is.

    Focus on the configuration:
    When you capture the first base plane with your “lid” on the sand box. You get that first line of values. The last number on the first line of your BoxLayout.txt file is the (z) distance from the camera to the lid. When you remove the lid to capture the 4 corner values, the last number in each of the for line is the (z) distance from the camera to the top of the actual sand.

    You need to update the last number in the first row to be less than (more negative) the highest value of your sand or you will never see the land.

    • This reply was modified 1 month, 1 week ago by mkaszuba.
    in reply to: Saving Screen Shots? #124050
    mkaszuba
    Participant

    Yes you can. Check out this post there: https://arsandbox.ucdavis.edu/forums/topic/usb-button-solution/page/6/#post-118278

    You will have to install SCROT, then edit the sandbox config file to assign a key/button press to the run the script mentioned in that post. You have have to update the script to your version of sandbox software as the script references version 2.5.

    • This reply was modified 1 month, 1 week ago by mkaszuba.
    in reply to: Rain and Lava #115784
    mkaszuba
    Participant

    Take a look here: #108359

    in reply to: Projector image will not fill sandbox #111197
    mkaszuba
    Participant

    Your 40×30 sandbox is a 4:3 ratio which is why the 16:9 will not work. If you projector is pushing a 16:9 ration change the linux desktop resolution to 1024×768 and see if that helps.

    in reply to: Big Size Sandbox #111174
    mkaszuba
    Participant

    It will most likely be a field of view issue. This link may help: https://msdn.microsoft.com/en-us/library/jj131033.aspx. If the horizontal field of view is only 57 degrees you will need to place your camera at the correct height for your box width to fit in that view. Hopefully you can remember your trigonometry. This may help: https://photo.stackexchange.com/questions/21536/how-can-i-calculate-vertical-field-of-view-from-horizontal-field-of-view

    in reply to: Kinetic Sand #111172
    mkaszuba
    Participant

    Yes, Kinetic sand is expensive and it is very slow to react (by design). It makes pushing the sand around a little tricky. I would suggest Santaskic sand. They have a white colour which reflects very well. https://www.sandtastik.com/100-sand/101-white-play-sand

    in reply to: Long throw projector workaround? #111169
    mkaszuba
    Participant

    Using a long throw projector is really tough as you noticed. They are designed to be 6 feet or more from their target area. A new Short Throw projector is definitely the way to go.

    Attached is an image to help explain the distances for each type of projector.
    Projector throw distances

    • This reply was modified 1 year, 11 months ago by mkaszuba.
    in reply to: Projector Calibration #111168
    mkaszuba
    Participant

    I have seen that before in my calibration. Usually that means the camera can not differentiate the target from the background. Try using a wider roll of tape to make the target disc higher. Or use the Straw idea from Oliver’s video.

    in reply to: Big Size Sandbox #111144
    mkaszuba
    Participant

    Check your depth camera view of the sandbox. While doing the calibration, make sure you can see all 4 corners of your sandbox. You may need to move your camera to a higher height.

    in reply to: Does camera have to be at same height #111143
    mkaszuba
    Participant

    No does not. It is just convenient that they are at similar heights for table construction.

Viewing 15 posts - 1 through 15 (of 55 total)