Turntable workflow

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    ssh4
    Hello matmoeb.

    Masking - yes, but if you have uniform background you can skip this. RC for this moment support only Image+Alpha masks, so you will need tiff or PNG with alpha as mask. Or you just can fill masked area with color.

    How many images? Every 10 degree step will hive good overlap. But remember, this is only one loop.
    For full 360 degree 3D scan you need about 18 loops, that required for the same overlap between loops from 4 to 36 images (from top or bottom loop to equator loop).

    Something like this (synthetic dataset):
    DDJnQjZ.jpg

    this is about 244 images
    result you can see here: https://sketchfab.com/models/b014299cbc ... 2a0c82ea6d

    You can choose 15 degree step, in this case it will be about 160 images for full 360 coverage, but you can lost details if you have complicated topology in your object.
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    ShadowTail
    For best results you want a solid background, preferrably a color that provides a strong contrast. So most likely either black or white.
    You also want uniform, diffuse lighting.

    For small objects a decent light tent should more than suffice.

    The more detailed or complex the object is, the more photos you should take.

    Here is a real world example:
    https://dl.dropboxusercontent.com/u/255 ... uirrel.rar (project file is for the demo version only, photos are included)
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    Steff
    Vladlen, what kind of gear are you using for such precise cam placement if I can ask .. 8-)
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    ssh4
    Hi Steff!

    Heh, as i wrote, this is synthetic dataset :) (made in 3D) for testing different software with "ideal" source with known ground-truth source.
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    Steff
    Oups... oki... hehe thanks for the Info :)
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    Paul Hailes
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    CR.Milan

    Greetings.

     

    It is possible to mask out parts of input images in order to exclude them from being used in the reconstruction process. Alpha channel is used for this purpose if present. Use full value to include and zero to exclude the pixel. E.g. tiff format works well.

    You can also check the mask within RC in 2d view. After selecting a 2d view with an input image activate the Mask option in Ribbon -> IMAGE -> Input Layer.

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    Paul Hailes

    Hi there,

    Thanks for your response, I am aware that I can use alpha channels during the reconstruction process, which I fully intend to do. However I believe masking cannot be used during the alignment process? It's at this point (the alignment step) that I cannot get a decent output. I'm just not convinced that having a green screen with lighting will make a drastic difference, however i'd like to be proved wrong! 

     

     

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    mobin

    Hi,

    I am a fresher and started learning 3d scanning process these days. I captured around 62 images of object on turntable rotation process.

    But while importing them all together it divides in 3 to 4 components and do not compile a 3d model.

    Is there any particular process or setting while compiling turntable images in RC?

    Please help

    Regards,

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    mobin

    Hi,

    I am a fresher and started learning 3d scanning process these days. I captured around 62 images of object on turntable rotation process.

    But while importing them all together it divides in 3 to 4 components and do not compile a 3d model.

    Is there any particular process or setting while compiling turntable images in RC?

    Please help

    Regards,

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    Wallace Wainhouse CR

    Hi Mobin,

                  I think you may need a lot more inputs. It's more likely your issue is due to inputs rather than the settings in the software. ssh4's comment at the top of this thread is still a pretty good guide. Also your goal for capturing is sharp, well lit, low noise images. 

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