3D scanning - with many tools to accomplish it

3D Scanning Services make use of a variety of methods

 

Not all scanners work the
same way and different kinds are favored by different interests, hence it
really pays to look into all of the different 3D scanning processes that are
available when you’re in the market for one. Once you get a good idea of how they work and where they excel you can confidently purchase one with the
knowledge of how you plan on using it and why it will suit your goals well.

 

Just because a certain
unit is popular it doesn’t mean that it will meet your needs as well as it has
with others. This is especially true when you are hoping to utilize 3D scanning
services for your business.

 

The scanner that you
eventually go with should reflect the specific, or more general ideas, that you
have in mind. Even if you just have a passing interest and would like a 3D
scanner just to have some fun it should be approached with patience and an
inquisitive mindset that gets you asking all kinds go questions about what is
the most important things that you would like out of the experience.

 

Each type of 3D scanning service has its advantages and
disadvantages, just like the same can be said when comparing varying models
that rely on the same general scanning process. 3D scanners can be broken down
into categories and they can vary greatly in the principles that they rely on
in order to capture the digitalized images that we may later manipulate and
improve with the help of software.

 

Teachers are sure to have
different ideas and priorities when compared to someone who’s just looking to
mess around and have a good time figuring stuff out willy nilly. As they would
probably like to incorporate it as part of a larger lesson plan they would most
likely appreciate models that have a particular affinity for capturing texture

 

For these types of
interests the best bet is most likely laser triangulation scanners as they
offer a great deal of resolution and accuracy. The way laser triangulations
works is through the projection of a laser beam on a surface of a 3D scanning
target, that may be a single laser point or a laser line, and then measuring
the varying deformation that the resulting rays have with the help of a sensor.

 

This is all thanks to
trigonometric principles that are able to accurately calculate the deviation
angles that are read as a series of distances. The downside is that it can be
sensitive to the properties of the whatever it is trying to scan, more than
anything surfaces that are either transparent or translucent.

 

Structured light 3D scanning
services work in a similar way but instead of utilizing a laser it measures linear
patterns of light on an object that are then trigonometrically triangulated. So
what it examines in this case are the edges of each light line that are
generally blue or white and emitted from a variety of projectors. 

 

The benefits to this type
of process are a high degree of resolution and speed, which makes it rather
ideal for utilizing 3D scanning services to capture the likeness of people.
However, as it is rather sensitive to lighting conditions it’s pretty difficult
to use in an external environment.

 

Another 3D scanning
technology that you may have heard of is one that you may have imagined
yourself as well and relies on taking a series of photographs. It’s called
photogrammetry and it takes a collection of photographs that were taken at
different angles and runs them through what’s called computer vision and
geometric algorithms. The best way to think about it is that it takes the
measurements from photographic images. You may have heard of holograms of
deceased celebrities being created in a similar way.

 

A good way to think about
it to compare it to the previous methods described is that it is a
reconstruction that relies on detection pixels that correspond to the same
physical point. It requires some pretty sophisticated and powerful software as
it needs data inputs that include lens distortion and focal length, which is to
be expected when it is able to accomplish such considerable precision and
boasts an acquisition speed that’s ideal for walk-in businesses. It can also
reconstruct images utilizing a variety of scales that may be compiled from
photographs that are taken from the air or on the ground.

 

The downside is that
photogrammetry requires a truly powerful computer. It also takes some time to
run all the long algorithms that try to fix data points and it is somewhat sensitive
to the resolution of the photographs that are provided.

 

And if you really need a
method that can deal with large objects you’ll need something like LASER pulse 3D
scanning services, also known as Time of Flight scanners as they rely on
reading the passage of time that a laser pulse takes as it travels form the
emission point to the object and back, with the help of a special sensor. As it
measures the time interval of laser travel it is ideal of working with large
subjects and environments.

 

This method can be
extremely accurate as millions of laser pulses can be sent out in one go. If
you’ve ever seen city workers measuring distances with devices that are on top
of tripods, this is what they use.  

 

Despite the fact that these
3D scanning services use lasers it is actually a pretty slow process that
requires patience as it needs to run very specific data through its
programming.

 

All the different 3D scanning
services described here have qualities that allow them to accomplish great
things for those who are willing to put in the time to figure out how they work
so as to achieve the best results. There are so many business that are applying
these capabilities to their business model, which thanks to the quality
construction of so many of them tends to be a relatively smooth addition.

 

Indeed with these various
systems a little imagination goes a long way!

Keep reading: more articles about 3D scanning

Leave a Comment