Mook Attakanwong(Featured) Garment Designer
Ben SimonsTech LeadCircular Dolly Rig Design & Production, Lighting Design, Photogrammetry R&D
Darren LeeVisualisation ProgrammerPhotogrammetry Capture & Processing
Scarlett SmoutFashion CoordinatorMannequin Dressing, Fashion Garment Styling
As a part of their final year project UTS fashion students are required to make 5 garments. This includes making their own materials and textiles for the garments and then showcasing them on a runway.
All textiles were scanned as well as the garment itself. The fashion garment was placed on a mannequin and then 300 photographs were taken from different angles around the garment.
Pairs of DSLR Cameras were rigged (see right) to obtain "image pairs" - features from each photo are the compared to compute the difference, and thus the distance & ultimately the 3D position of each feature. Joining these points creates a triangular mesh. Then the actual photos are projected (texture-mapped) onto this surface mesh to produce the real-looking 3D model. The detail comes from the photo, not the geometry which is fairly low resolution.
The 3D model was obtained by using Photoscan by Agisoft, which was fairly new in 2014. These days there are many ways to obtain a 3D model from a sequence of images.
We experimented with various camera separation distances (14cm to 130cm), as shown in the video below. This is the gap between the pair of cameras. 14cm was the closest we could mount them turned 90-degrees side-by-side in portrait mode. We found there was a sweet-spot for the separation which best handled cloth materials with many folds. Generally, the greater the camera separation the lower the ability to match features in the pictures from the two cameras.
This project was made possible through the construction of a 3D camera rig, comprising left and right side cameras to create a stereo image. The Data Arena team made an excursion to Bunnings (a local hardware store) and bought garden hoses and shopping trolley wheels which were used to construct the rig.
The garden hoses were placed in concentric circles on the ground and used as guide rails for the wheels which were attached to the camera rig. The rig was used to photograph the dress and the pictures were stitched together on a computer using photogrammetry software.