To support the object I used rolls of toilet paper clipped. In the following pictures you can see some shots of this phase of work. There have been many tests to verify the proper movement to be performed with the laser, the right distance from the object and the scrolling speed of the ray.Īfter the calibration phase, the time has come in which the object should be acquired by the David Scanner. Initially the base of the box was white, then I inserted a small black backing to prevent reflections. A bright light may affect the reflections of the laser and cause many errors during acquisition. It was enough to put together all the elements mentioned above and then calibrate the camera with printed markers of the box. At this stage it is necessary to increase the brightness of the webcam and align markers with respect to larger, I used a dvd box to slightly raise the tripod and put it in line with them. There was no need to change the ambient light, as for this stage to be perceived that the real picture of the default background. Then the tests were carried scan to adjust the webcam and the light environment. The results, in terms of performance, are excellent Īs a first step it was necessary to build the scanner. Using for editing a Mac, I decided to use for the acquisition of an old laptop PC on which I’ve installed Windows XP as the operating system.
Is necessary that there is’t reflective surface on the box space
Important to remember not to use clear tape, because the laser on the surface reflects its radius and causes a lot of artifacts.
Plans background were constructed with a cardboard box cropped on which were glued sheets with markers for calibration. It ‘just that it is possible to change the settings for contrast and brightness for a better control of acquisition Ī small garden – with built-in level – laser that projects a red laser-ray linear enough to be perceived by the webcam. The cost of this item was € 10.90, but with a more powerful laser, probably, we would get better results There are no special care in choosing this item.
To acquire a three-dimensional model with David Scan is enough to be in possession of free software made available by the product’s website. The basic kit provided by the company at a price of € 499 (in basic webcam + laser version) and includes a number of standard components. The real problem of this type of scanner is the low quality of the mesh in the free version of the software, for this reason many trials were necessary before the final scan. For the project I replaced the components supplied with homemade items at the price of about € 20. Specifically, the components in the same order as they appear on the website, are:Ī Microsoft webcam, fitted with a screw on the bottom that would allow to tie it on a tripod (by the laser kit) at total price of € 9.90.
0 kommentar(er)
