Figure Sculptures for Spanish Festivals, Made Easy with EScan

Wed Oct 5, 2010

In Spain, artists like me who create large-scale sculptures have learned how to use 3D scanning, with excellent results. Most of the figures I produce are used in traditional festivals, in and around Valencia, where my studio is. They range from four to 10 feet high and take from one to three weeks to produce. Three-dimensional scanning makes the work go much faster. Before, I would have to start from scratch by drawing on plates.

I first learned about three-dimension scanning technology on-line. There were various products to select from, but the EScan from 3D Digital seemed the best option. Because of this technology, I can now begin the process by molding a figure about 30 centimeters high. Once I have this model figure looking the way I want, I use the EScan 3D scanner to capture the surface geometry. Then I build up the piece to the size that’s needed, and cover it in paper and paint.

If a one of figures for the festival was well-received, I may want to reproduce it for the next year, perhaps in a different size or coloration. With the EScan 3D technology, I can take a file that is saved on a CD and load it back. From there it’s a simple matter to scale the figure up or down

I am using my scanner quite a lot now, because I have been commissioned to create 20 different figures for the 2011 festival. They will be five to eight feet in height when I am finished. In selecting a 3D laser scanner, I was drawn to the EScan because it works better and is even less expensive than many others. Truly, the most challenging part of learning to operate the 3D scanner was translating instructions from English to Spanish. After that, the technical part of it was easy.

Test Post

Test post to try out certain functions of the site. This could be construed as the test that changed the world, but I don't think so. It's really just intended to be made up of quite a few words to make sure that posts are truncated where they should be. Just try reading it aloud and see if the sentence cuts off in an unexpected place.

Accuracy

While the resolution affects the image quality in the x and y dimensions, the accuracy refers to the image quality in the z (or depth, or range) dimension. 3DD scanners calculate the range of each point on the target object. CCD noise, imperfect optics, and fundamental laws of physics all result in some error in the calculated range. It is not possible to design a scanner that does not have some error. The accuracy is a measure of this error. It is defined as the standard deviation of the difference between the measured range and the actual range to a target. The range error is approximately Gaussian in nature. This implies that if we scan a perfectly flat plane, at a fixed range of 245mm (10″), and if the accuracy of the scanner is 250microns (0.01″), and we build a histogram of the ranges of each of the points it would look like the one shown in the following figure. 65% of the range points will lie within +/- 1 standard deviation from the mean, i.e.: +/-250microns (+/- 0.01″). 95% of the range points will lie within +/- 2 standard deviations from the mean, i.e.: +/-250microns (+/- 0.02″).

» Back to overview of 3D scanner technology.