Hi all,
Please read my comments on the following sections (1.2 and 1.3).
1.2 Introduction to Optical Techniques
Page 3
- add abbreviations in the introduction, that way you do not have to
do it further in the document (FTIR, FI, RI, DI, LLP, DSI etc).
- Infrared (IR in short) -> Infrared (IR)
- "It is a range of wavelengths longer than visible light, but shorter
than microwaves." <- wtf? is this trivia?
- "By removing the infrared filter and replacing it with one that
removes the visible light instead, a camera that only sees infrared
light is created." <- "By removing the infrared filter and replacing
it with a visible light filter (cut off filter or bandpass filter),
the camera will only see infrared light"
Page 4
- Remove abbreviation introduction (it is redundant) at the top
- Remove "Most of the time"
- (Bullet 1) You do not need "brighter than normal IR LEDs", I used el
cheapo no brand IR LEDs for my first FTIR screen. However, you can
recommend using bright IR lights will improve the performance (OSRAMS)
- it's -> it is (do not use: don't it's wasn't etc. in books or
papers)
Page 5
- Radiant intensity: 80mW minimum? Who decided this?
- Angle of FTIR: I completely disagree with this part. I used el
cheapo LEDs with an angle of (60 degrees) and expensive Osrams SFH485
(40 degrees).
- Angle of DI: Wide angle means that the illumination intensity goes
down, so I do not agree with this part either.
- "For the DI setup, many setups bump into problem of hotspots. In
order to eliminate this, IR light needs to be bounced off the bottom
of the box when mounted to avoid IR hot spots on the screen." <- I
disagree, it is all a matter of using the proper diffuser/screen
materials and the angle of these IR lights. Also if you place the
diffuser on the bottom of the screen it will eliminate all reflections/
hotspots. If you have proper diffuser material (not just tracing
paper, but some synthetic material such as polyester) you can just put
the diffuser on top of the screen.
- "Also, a band pass filter for the camera is required - homemade band
pass filters such as the exposed negative film or a piece of a floppy
disk will work, but they’ll provide poor results. It’s always better
to buy a (cheap) band pass filter and putting it into the lens of the
camera.". <- A floppy disk is just nonsense, that is the same theory
as the "black garbage bag" someone recommended on the forums. Those
materials just 'darken' the image, they do not 'filter' the light. And
a good band pass filter usually is not cheap.
- "We need just the opposite" <- Replace... its a book, not a blog
post so choose your words carefully.
Page 6
- Remove the (IR) at Lens type.
Page 7
- Perhaps remove the reference to the Sony Sensor and replace the
current bogus picture with a (non-copyrighted) picture that shows an
Spectral Sensitivity Characteristics example based on the one of Sony.
- Change the caption of the image... because the information does not
suits the Figure.
- Besides the fact that its a bit redundant to mention black negatives
and floppy drive magnets, I do not agree with this. I recommend
removing this part or at least the one that mentions floppy drive
magnets. Also, it does not state how you can get hold of 'black
negatives'.
Page 9
- First line suggests that we named it FTIR... so better use another
opening sentence.
- Also add the references to Jeff's paper here.
- You can add the Wikipedia reference to the 3rd sentence (Total
Internal Reflection describes..)
- Fix you reference style in the introduction
- Reference to Snell's law (or at least a footnote for additional
info?)
Page 10
- If you want you can add a link to my blog regarding the acrylic
treatment part.
- "even wet sandpaper" -> "wet sandpaper"
- "won't" -> "will not"
Page 11 (This section seems all new for me, I do not remember writing
this much about Compliant Surfaces)
- Perhaps add a reference to Harry's howto guide (silicon)
- "rubbers, lexel, and various brands of RTV silicone" Lexel is a
brand name I think so it should be Lexel with a capital.
- "three ‘rubber’ materials mentioned earlier...they all have"
- Do not mention Tinkerman without a proper reference (how is the
reader suppose to know who Tinkerman is).
Page 12
- Do not use "I" or "my" and minimize the use of "we" and "you".
- "Seems to react better for dragging movements (at least in my
experience)" <- ...
- Christopher who? my next door neighbor? reference...
As seen above, there are still many issues with the nuibook (and it is
not just related to referencing but also the writing). For now I have
only checked the sections 1.2 and 1.3 because those are the sections
to which I contributed content. Large parts of my initial work seem to
be rewritten, however not every part has been rewritten well. I do not
know if this section also reflects the rest of the book but this is
really a concern.
If this was just a tip of the iceberg I do not know whether I still
want to be co-author of this book. I am not willing to put much more
effort in the book and correcting stuff (simply because I do not have
the time). If we can not assure the quality of all of the content, I
would like to have my name removed from the nuibook.
Kind regards,
- Laurence Muller
On Sep 5, 1:08 pm, rbedi100 <
rbedi...@gmail.com> wrote:
> Here is the most recent edition (the one that was sent to Lulu and
> then pulled), but without the updated references:
http://groups.google.com/group/nui-multi-touch-book/web/Multi-Touch_T...