3d scanner environment
image
Matt
Hi there previously I have build some laser spyro projects but I have absolutely no idea about RGB LASER Scanners can someone please help.I have tried to find every possible information on the internet but I guess I need to start from the basics.
Thanks : )
Answer
there are several ways to do this, each involving different amounts of electro-optics in digital and analog forms.
you'll have to decide what you're scanning. is it 2D? 3D? still? or live-action?
in the easiest of cases, you can probably find an old photocopy machine and see how that works.
in the hardest case, your scanning data might become real-time input to a vehicle that must navigate through its environment.
so you will have a scanning beam, and a detector.
the scanning beam is a laser; you're interested in tri-colour, so this is either three lasers of different wavelengths, or it is a white-light laser that you will later filter. true white-light lasers are pulsed. if the pulse rate is really high (eg: in the millions of pulses/second), then each pulse could represent a pixel, and still have a mean free path of several meters.
the detector is a CCD photoreceptor, (or a whole lot of them), filtered to pass the desired wavelength(s). you can choose to capture:
a) a stream of individual bounces without regard to the focus;
b) a whole scan line into a buffer at once; or
c) a whole 2D frame into a buffer at once.
each method implies different mechano-optics, with a) being the simplest, mechanically. additionally, it may be possible to convert some digital cameras to use for this purpose.
to scan, you'll draw a point of light across a remote object, detecting the intensity of what bounces back. if this is not a range-finding device, then the outbound signal may be constant-intensity; but to detect distance, velocity, or absorption spectra, you will have to do some optical and/or high-speed tricks (sub-nanosecond processing is hard) involving correlating the outbound signal to the returned signal, to build a profile.
photon time-of-flight would indicate distance, (1 ns is about 30cm), and doppler shift would indicate speed.
to detect time of flight implies very high sensitivity and probably high frame rate, too.
to detect doppler shift and spectral lines would require that the returned beam travel through a prism, to give angular separation to the photon stream by wavelength. in this case, you'll always be scanning into a buffer, whose width covers the returned wavelengths.
each scan line would be drawn using a mirror that can tilt and swivel on two orthogonal axes. (or a pair of mirrors, arranged to swivel on orthogonal axes). controlling the mirror(s) will be subtle and delicate, because vibration may cause some fuzz in where the point gets drawn.
(think of a mechanism very similar to a DVD reader, for instance.)
for noise control, you'll want to distinguish between ambient light and returned signal.
what are the best web design universities/colleges in USA? MAX!?
Michael
I would to become a web designer (graphic and coding) and what are the best universities/colleges for this in USA? with a BFA degree...
MAX!!?
Answer
In the USA, I recommend the following:
Pratt Institute, New York, NY;
Cranbrook Academy of Art, Bloomfield Hills, MI;
Art Center College of Design, Pasadena, CA;
California College of the Arts, San Francisco, CA;
University of California Los Angeles (UCLA), Los Angeles, CA;
Rhode Island School of Design, Providence, RI;
Otis College of Art and Design, Pasadena, CA;
Carnegie Mellon University, Pittsburgh, PA; and
Virginia Commonwealth University, Richmond, VA
Although I urge that you explore all of the above, I am more familiar with the following; and, thus, I have provided a bit of information.
*Art Center College of Design
1700 Lida Street
Pasadena, CA 91103
(626) 396-2373
The college offers programs leading to the BFA and BS Degrees, as well as graduate degrees. Its GRAPHIC DESIGN design program is first-rate and it includes excellent academic and technical offerings. For the increasingly computer-literate students who enter the Art Center, the idea of leadership is key. As the college notes, "these young designers will have opportunities to shape the development of a medium that is only beginning to fulfill its promise."
Please see:
http://www.artcenter.edu/accd/programs/u...
*Otis College of Art and Design
9045 Lincoln Boulevard
Los Angeles, CA 90045
(310) 665-6820
Otis College of Art and Design has a four year Bachelor of Fine Arts program that offers majors in seven areas: Communication Arts, DIGITAL MEDIA, Architecture/Landscape/Interiors, Fashion Design, Fine Arts, Interactive Product Design and Toy Design. The cornerstone of the Otis program is the first year curriculum, which is called Foundation. Students from all majors take the core studio classes: drawing and composition, figure drawing, two and three dimensional design. In these integrated classes students build the art, design and creative skills and vocabulary that are the "foundation" of their subsequent studies and future work. Students enter their sophomore year well prepared to begin work in their major.
It has an excellent DIGITAL MEDIA program the primary goal of which is to strike a balance between traditional art and technology, and between individual vision and teamwork. By providing a fundamental understanding of digital tools and their creative applications, the department prepares graduates to meet the demands of a diverse and expanding job market. Leading designers for visual effects, Web, film, television, broadcast media, advertising, and video gaming guide the students.
Please see:
http://www.otis.edu/academics/index.html
http://www.otis.edu/academics/digital_me...
*University of California Los Angeles (UCLA)
405 Hilgard Avenue
Los Angeles, CA 90095
(310) 825-3101
The UCLA School of the Arts and Architecture has a world-class
Department of DESIGN AND MEDIA ARTS. The School and Department take pride in educating responsible designers and artists for the information age by teaching the fundamentals of Design, Media, and the Arts, and encouraging experimentation and innovation. The Department provides an extensive education in Design and Media Arts practice, history and criticism; and it fosters a critical and creative exploration of emerging forms of visual communication, typography, interaction and interface design, ubiquitous computing, virtual environments, information spaces, networked agents and other pertinent areas of research.
Housed in the remarkable Broad Art Center, its facilities include the DMA Labs. These facilities feature high-end Windows and Macintosh computers; various peripherals, such as scanners, laser printers, and large-format Epson plotters; CD and DVD burners; and film recorders and digital video cameras. The Labs also provide access to a large library of graphics software in the areas of digital photography, illustration, interactive media, and 3D-modeling and animation. In addition to the main labs, the facilities include studio space for graduates and undergraduates, several faculty research labs, a blue screen room, a video facility supporting analog and nonlinear digital editing, audio mixing, and video capture, and two digital audio facilities. Wireless access is available to laptop users, and all the computers in the facilities are connected to the campus network, giving students individual access to DMA network resources and the Internet.
Please see:
http://www.design.ucla.edu/
http://dma.ucla.edu/education/undergradc...
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