Sometimes it is difficult to set-up a suitable backdrop and stand to allow automatic masking to work well (for example the stand may need to be a different colour to the backdrop). However completely manual masking can be tedious and error-prone.
3DSOM Pro provides a semi-automatic tool to make manual masking easier. Simply sketch a very rough outline around the object and the mask can be "shrink-wrapped" onto the object for quick and accurate masking.
Remove any existing mask using the Edit Masks toolbar. button from the
Select the button to paint in the mask colour and select a round brush using the button. Adjust the brush slider to select a thick brush (around 20 pixels). Now paint a very rough outline around the object. Make sure you keep the mask colour completely outside the object.
The outline can be very rough but make sure you don't touch the object you are trying to mask. If there are holes in the object shape you can also paint inside these areas to help the masking process.
Hit the button and drag the masking slider to interactively shrink-wrap the mask. Move the slider to the right to create more mask colour and to the left to create less mask colour.
For finer control you can modify the shrink-wrap threshold in a rectangular region of the image. Simply click the button. Then select the desired image region by dragging with the left mouse button. Now drag the masking slider to interactively set the threshold for the selected region only.
Select or deselect the "Holes" checkbox to allow or disallow holes in the object. Clicking this button will instantly update the mask. The colour normalisation setting has no effect when shrink-wrapping.