3DSOM Pro provides an extensive set of automatic, semi-automatic and manual masking tools. However users may wish to use additional tools provided by external 2D imaging software (such as Adobe PhotoShop) to mask the images.
Premasked images with an alpha channel can be loaded into 3DSOM Pro in TIFF format. This is only recommended for image editors such as PhotoShop where camera setting metadata found in the raw image files is preserved when saving the masked versions.
Alternatively, the mask data can be exported from 3DSOM Pro along with the image data as a 4 channel RGBA image for editing in 3rd party applications. Edited masks can then be imported back into 3DSOM Pro for use in 3D model generation.
Using pre-masked images
PhotoShop users can create an alpha-channel mask for all the images and save in TIFF format (4 channel RGBA). These images can then be loaded directly into 3DSOM Pro for example using the menu item. Make sure the RGB channels have not been modified so that the calibration mat can be correctly detected.
Note that if you choose to use this workflow, we recommend that all masking is peformed in PhotoShop. If you wish to edit a mask simply edit the TIFF image and then refresh the masks in 3DSOM Pro using the menu item.
In the Thumbnail Window, select the masked thumbnails that you wish to edit in a 3rd party application. Use ctrl-click to add an additional thumbnail to the selection and shift-click to select a block of thumbnails.
Select the "Masks in same folder as each image" option and hit the button. menu item to save the masks. You will be offered the choice of a number of mask export formats. For compatibility with standard 2D image editors, we recommend you select the TIFF file type. If the directory containing the input images is writeable, it is recommended that the TIFF files are saved in the same directory. i.e. select the
File formats for saving and loading masks:
The mask information is stored in the "alpha" channel which may not initially be visible. To display the current mask in PhotoShop, select the Channels tab ( menu item). Then click on the checkbox next to the "Alpha" channel to turn on the visibility for this channel.
Alpha channel convention
In PaintShopPro you need to first create a mask using themenu item. Then select the menu item.
You can use all editing tools in your image editor application to edit the mask channel. If you are editing a mask in PaintShopPro make sure you save the result back to the alpha channel using the menu item. When you are done editing save the TIFF file using the original filename.
Masking tips for PhotoShop users
Once you have edited the RGBA TIFF images they can be loaded back into 3DSOM Pro by selecting the appropriate thumbnails and using the menu item. It will ignore the images that it doesn't find a mask files for — these are the ones not marked with an asterisk in the list of filenames.
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