Thursday, 18 February, 2016. 23:44
It’s been a long day, but fun. This morning we allowed ourselves a sleep in until 08:00, since the first conference talks I wanted to attend didn’t start until 09:10. We did the breakfast routine with Grape Nuts and milk and yoghurt from the hotel cafeteria. Then I went to my talks while M. hung around in the room a bit before leaving to drop off a bag of laundry at Pete’s Cleaners, a place near the Stockton Tunnel which we’d used last time we were here. They charged $15 for a bag wash of everything we’ve worn so far this week. Then she walked down Market Street west towards Hayes Street to explore some of the shops along that street.
The morning sessions of the conference began with talks on 3D scanning. One was about fixing intermediate depth assignments for pixels on the edges of foreground objects in front of a more distant background. One was generating a deformable 3D model template from video of moving non-rigid objects, such as people or animals. And one was about integrating scans from multiple Microsoft Kinect 3D sensors into a single 3D colour model.
After the coffee break I attended another session of the Colour conference, this one about printing. There was a talk about choosing optimal compression algorithms for printing, followed by one about predicting how much toner a page would take to print (apparently not a straightforward problem). Then there was one about dithering of colours in 3D printing, which is much more complicated than in 2D printing, because surfaces can appear at any angle in three dimensions, and the dithering patterns can produce visible moiré effects if they’re not optimised properly for all viewing angles. The last two talks were essentially two parts of one long talk about a project to construct and program a robot to take a given image, then convert the image to a set of brush strokes, then paint it using an actual paintbrush and paints. This was by the same woman who had talked about cadmium red yesterday. The system worked with oil paints and took account of the layering and the textures created by applying paint thickly. It was quite interesting, but I think it has a lot of unfulfilled potential yet, like mixing paint colours on the canvas.
Oil painting robot.