Tag Archives: CCD

1. Computer Systems, Computing Higher

Scanners

OK, I admit it I went on a little about this 🙂

Here is a good post on the working of a scanner and in researching it I found that the video (below) in question was correct for colour CCDs.

[kml_flashembed movie="http://www.youtube.com/v/ZTWQbeE82HU" width="425" height="344" allowfullscreen="true" fvars="fs=1" /]

We will look at CCDs in more detail in next weeks lesson.

Here is a take apart that shows a LED scanner in more detail 🙂

[kml_flashembed movie="http://www.youtube.com/v/AuMkpaenqm8" width="425" height="344" allowfullscreen="true" fvars="fs=1" /]

1. Computer Systems, 3. Multimedia, Computing Higher, Revision

A couple of questions from today

Jonathan asked me a couple of very good questions today and I thought I would share my answers.

What is the difference between a linear CCD and a Array CCD?

  • A linear CCD is used in scanners and consists of a row of CCDs that moves down the document.
  • A CCD array is used in digital cameras and consists of a grid of CCDs as shown in this picture

Is it just CCDs that are used in digital cameras.

  • Some cameras use cheaper CMOS sensors, these sensors are not as fast and do not produce the same quality as a CCD. Wikipedia has this to say.

What does WRL stand for

  • This has taken a fair bit of research and the answer was on the blog the whole time… “World Description Language”. Personally I take the view of a lot of the websites WRL is the file suffix for VRML files and stands for WoRLd.

So with all this on the blog I updated the Multimedia Glossary, after all what else did I have to do.