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added code snippets, future work

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midyear report/midyear.lyx
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@ -16,7 +16,7 @@ todonotes
\language_package default
\inputencoding auto
\fontencoding global
\font_roman "default" "default"
\font_roman "utopia" "default"
\font_sans "default" "default"
\font_typewriter "default" "default"
\font_math "auto" "auto"
@ -167,7 +167,22 @@ University of Surrey
\end_layout
\begin_layout Abstract
abstract
The scope and current state of the multi-source holoportation project is
examined.
The aim is to take a suite of 3D video capture software and extend it from
the current capabilities of multiple sensors but a single client to handle
multiple groups of sensors called sources during frame collection and display.
Currently the display methods have been extended in line with the specification
in order to allow simultaneous display and arbitrary real-time placement
within the display space.
\end_layout
\begin_layout Abstract
The future work for the project is described including the current designs
for said endeavours.
The bulk of this remaining work involves developing the network capabilities
of the software to accommodation multiple sources.
\end_layout
\begin_layout Standard
@ -177,6 +192,24 @@ LatexCommand tableofcontents
\end_inset
\begin_inset Newpage newpage
\end_inset
\end_layout
\begin_layout Standard
\begin_inset FloatList figure
\end_inset
\begin_inset CommandInset toc
LatexCommand lstlistoflistings
\end_inset
\end_layout
\begin_layout List of TODOs
@ -477,7 +510,7 @@ Worlds in Miniature
\end_layout
\begin_layout Standard
The Worlds in Miniature is described in the paper
The Worlds in Miniature is described in
\begin_inset CommandInset citation
LatexCommand cite
key "wim"
@ -488,9 +521,8 @@ literal "false"
as a set of interfaces between the user and the virtual space they experience
using tactile and visual tools.
The interface involves providing the user with a miniature render of the
world they are inhabiting.
This model can interacted with in order to affect the full scale environment
around them.
world they are inhabiting that can interacted with in order to affect the
full scale environment around them.
\end_layout
\begin_layout Standard
@ -715,7 +747,7 @@ status open
\begin_inset Caption Standard
\begin_layout Plain Layout
Initial structure of the
Initial architecture of the
\noun on
LiveScan3D
\noun default
@ -787,11 +819,19 @@ The required development to take the existing
\noun on
LiveScan
\noun default
codebase to the desired multi-source result can be split into two parts.
codebase to the desired multi-source result can be split into two areas
of concern.
\end_layout
\begin_layout Standard
The network layer of the
\begin_layout Labeling
\labelwidthstring 00.00.0000
\series bold
\emph on
Network
\series default
\emph default
The network layer of the
\noun on
LiveScan
\noun default
@ -807,8 +847,15 @@ sources
for which separate frames are collected for display.
\end_layout
\begin_layout Standard
Finally the display element of the server should be extended to allow the
\begin_layout Labeling
\labelwidthstring 00.00.0000
\series bold
\emph on
Display
\series default
\emph default
Finally the display element of the server should be extended to allow the
simultaneous presentation of multiple point clouds.
These objects should be individually arrangeable in the display space allowing
both movement and rotation.
@ -821,9 +868,8 @@ OpenGL
\noun default
window, has been modified such that it can construct and render point clouds
from multiple sources.
To do so a dynamic sub-system of geometric transformations has been included
such that the renders of individual sources are arranged coherently within
the space when reconstructed.
To do so a dynamic sub-system of geometric transformations has been written
in order to coherently arrange sources within the space when reconstructed.
The default arrangements can be overridden with keyboard controls facilitating
arbitrary placement and rotation of separate sources within the
\noun on
@ -853,7 +899,18 @@ Point3f
Point2f
\noun default
respectively are used in drawing skeletons.
There is also a class defining an affine transformation.
There is also a class defining an affine transformation, the definitions
for all three can be seen in appendix
\begin_inset CommandInset ref
LatexCommand ref
reference "sec:Existing-Data-Structures"
plural "false"
caps "false"
noprefix "false"
\end_inset
.
\end_layout
\begin_layout Standard
@ -942,9 +999,9 @@ Separation of Network and Presentation Layer
\begin_layout Standard
During initial testing frames received from a live sensor were intercepted
and serialized to XML files in local storage.
These frames were loaded back as the server started and the values were
merged with those received live before display.
and serialized to XML in local storage.
These frames were loaded into memory as the server was started and merged
with those received live before display.
\end_layout
\begin_layout Standard
@ -983,7 +1040,7 @@ status open
\begin_inset Caption Standard
\begin_layout Plain Layout
Initial composite testing frame
Initial multi-source composite testing frame
\begin_inset CommandInset label
LatexCommand label
name "fig:Initial-composite-frame"
@ -1005,10 +1062,11 @@ name "fig:Initial-composite-frame"
\begin_layout Standard
The objects can be seen to be occupying the same space due to their similar
positions in the frame.
positions in the frame during capture.
This is not a sufficient solution for displaying separate sources and so
geometric transformations like those mentioned above were employed.
This can be seen in figure
geometric transformations like those mentioned above were employed to separate
the two.
The change in software structure at this stage can be seen in figure
\begin_inset CommandInset ref
LatexCommand ref
reference "fig:Initial-testing-layout"
@ -1105,7 +1163,7 @@ status open
\begin_inset Caption Standard
\begin_layout Plain Layout
Composite frame following 180° rotation of recorded frame in
Composite testing frame following 180° rotation of recorded source in
\begin_inset Formula $y$
\end_inset
@ -1157,17 +1215,18 @@ OpenGL
Microsoft Hololens
\noun default
and Mobile AR applications.
Therefore when designing the multi-source capabilities the separation of
logic between the network and presentation layer will be important.
Therefore when designing the multi-source capabilities, the separation
of logic between the network and presentation layer is important.
The way in which the
\noun on
OpenGL
\noun default
window arranges the figures within should be defined by the
window arranges the figures in it's display space should be defined by
the
\noun on
OpenGL
\noun default
window.
window itself.
The network layer should be display agnostic and not make assumptions about
how the display will process figures.
\end_layout
@ -1188,8 +1247,19 @@ MainWindow
OpenGL
\noun default
were changed.
The Frame structure was defined to wrap an individual point cloud with
a client ID to allow differentiation.
A Frame structure was defined to wrap an individual point cloud with a
client ID to allow differentiation, the definition can be seen in appendix
\begin_inset CommandInset ref
LatexCommand ref
reference "subsec:Frame"
plural "false"
caps "false"
noprefix "false"
\end_inset
.
The structure holds fields for each of the lists previously shared between
the two objects including a list of vertices or co-ordinates and the RGB
values for each as well as the camera poses and bodies.
@ -1200,9 +1270,12 @@ The original
\noun on
LiveScan3D
\noun default
cleared each of these variables for each newly retrieved frame, when moving
cleared each of these variables before retrieving a new frame, when moving
to a multi-source architecture the ability to individually update source
point clouds was required.
point clouds was noted as being important.
This would remove blocking the entire display when unable to receive frames
from a specific client, other clients would still be able to have frames
updated promptly.
\end_layout
\begin_layout Standard
@ -1240,7 +1313,67 @@ DisplayFrameTransformer
\noun on
OpenGL
\noun default
window.
window, a UML diagram for the class can be seen in figure
\begin_inset CommandInset ref
LatexCommand ref
reference "fig:UML-displayframetransformer"
plural "false"
caps "false"
noprefix "false"
\end_inset
.
\end_layout
\begin_layout Standard
\begin_inset Float figure
wide false
sideways false
status open
\begin_layout Plain Layout
\align center
\begin_inset Graphics
filename ../media/DisplayFrameTransformer.png
lyxscale 30
width 50col%
\end_inset
\end_layout
\begin_layout Plain Layout
\begin_inset Caption Standard
\begin_layout Plain Layout
UML diagram for
\noun on
DisplayFrameTransformer
\noun default
\begin_inset CommandInset label
LatexCommand label
name "fig:UML-displayframetransformer"
\end_inset
\end_layout
\end_inset
\end_layout
\begin_layout Plain Layout
\end_layout
\end_inset
\end_layout
\begin_layout Standard
@ -1249,7 +1382,7 @@ Each client is assigned a default transformation which can be overridden
\end_layout
\begin_layout Standard
Clients are initially arranged in a circle in around the origin in the center
Clients are initially arranged in a circle around the origin in the center
of the space.
This is done by retrieving a transformation for a rotation in the
\begin_inset Formula $y$
@ -1294,9 +1427,24 @@ DisplayFrameTransformer
also has methods to override these initial transforms with the RotateClient()
and TranslateClient() methods.
When these methods are called for the first time for a client an object
defining the position and rotation is pulled from the default rotation.
From here the presence of a client override leads returned transforms to
be defined by these values instead.
defining the position and rotation is populated using the default rotation.
From here the presence of a client override results in applied transforms
being defined by these values as opposed to the default orientation.
\end_layout
\begin_layout Standard
This leaves the current architecture of the server application as described
in figure
\begin_inset CommandInset ref
LatexCommand ref
reference "fig:current-state-diagram"
plural "false"
caps "false"
noprefix "false"
\end_inset
.
\end_layout
\begin_layout Standard
@ -1353,6 +1501,112 @@ name "fig:current-state-diagram"
\end_layout
\begin_layout Subsection
Control Scheme
\end_layout
\begin_layout Standard
The movement of objects within the
\noun on
OpenGL
\noun default
space is conducted through keyboard controls.
While mouse control would fine-grained and intuitive, the axes of motion
and rotation available to objects makes defining specific keys for each
more flexible.
This additionally removes the need to redefine or overload the camera controls.
\end_layout
\begin_layout Standard
The
\begin_inset Quotes eld
\end_inset
I
\begin_inset Quotes erd
\end_inset
key is used to cycle through displayed sources, the currently selected
source is the subject of each of the movement actions.
Sources are moved across the horizontal plane (
\family roman
\series medium
\shape up
\size normal
\emph off
\bar no
\strikeout off
\xout off
\uuline off
\uwave off
\noun off
\color none
\begin_inset Formula $x$
\end_inset
\family default
\series default
\shape default
\size default
\emph default
\bar default
\strikeout default
\xout default
\uuline default
\uwave default
\noun default
\color inherit
and
\family roman
\series medium
\shape up
\size normal
\emph off
\bar no
\strikeout off
\xout off
\uuline off
\uwave off
\noun off
\color none
\begin_inset Formula $z$
\end_inset
\family default
\series default
\shape default
\size default
\emph default
\bar default
\strikeout default
\xout default
\uuline default
\uwave default
\noun default
\color inherit
axis) of the display space using a WASD-esque layout of the UHJK keys.
Objects can be rotated about the vertical (
\begin_inset Formula $y$
\end_inset
) axis using the B and N keys.
Finally the placement of an object can be reset to default using the R
key, the addition of the shift modifier resets all clients.
\end_layout
\begin_layout Standard
Worth noting is that this represents arbitrary placement of sources in two
axes of position and one of rotation.
This is a result of these being the most common and intuitive axes with
which sources will need to be manipulated.
The ability to allow movement in all degrees would require only binding
these actions to keys.
\end_layout
\begin_layout Section
Future Work
\end_layout
@ -1366,7 +1620,250 @@ OpenGL
\noun on
KinectServer
\noun default
can now be developed and tested using a fully functional display method.
can now be developed with the advantage of a fully functional display method
for debugging.
\end_layout
\begin_layout Standard
The aim of this aspect of the project will be to alter the the
\noun on
KinectServer
\noun default
in order to allow the logical grouping of connected clients into sources
for separate display.
\end_layout
\begin_layout Standard
When integrated together the server as a whole will then be able to collect
discrete point clouds from different sources and coherently display them
separately in the space, in doing so achieving the objectives for this
project3.
\end_layout
\begin_layout Subsection
Network Layer Design Considerations
\end_layout
\begin_layout Standard
Some thought as to the design for the network layer has been undertaken.
Although this has not yielded a final design for implementation, it has
made apparent some of the conditions and constraints which must be considered.
\end_layout
\begin_layout Standard
When considering the initial steps for the project, it was thought that
the network layer should be developed first.
The design would involve separating much of the logic contained within
the
\noun on
KinectServer
\noun default
object into a new
\noun on
KinectSource
\noun default
object which would represent a group of clients acting as a single source.
It would function as a group of
\noun on
KinectSocket
\noun default
s that could be individually polled for new frames using the same interface
currently being used by the
\noun on
KinectServer
\noun default
.
The
\noun on
KinectServer
\noun default
object itself would be reduced to simply managing these
\noun on
KinectSource
\noun default
s.
\end_layout
\begin_layout Standard
An advantage would be that additional objects which should exist per source
such as the calibration information and settings could then be contained
within.
\end_layout
\begin_layout Standard
This would, however, have represented a significant architecture change
in the entire server application and without a functioning display method
would have been challenging to debug.
As a result, it was instead decided to work on the display method first.
\end_layout
\begin_layout Standard
Coming back to the network design following this work, a different method
has been considered.
A separate piece of work currently being undertaken is investigating the
network behaviour of the suite with focus on unblocking the sockets to
aid in the parallel operation of the server.
\end_layout
\begin_layout Standard
Considerations from this work in combination with an emphasis on minimalism
and simplicity has suggested a new approach.
\end_layout
\begin_layout Subsubsection
Socket Handshake
\end_layout
\begin_layout Standard
A handshake process has been suggested for when new clients connect to the
\noun on
KinectServer
\noun default
.
The aim is to implement the method by which clients are grouped into sources
but also to solve how clients identify themselves consistently when communicati
ng over multiple sockets.
Multiple sockets can be used by clients in order to make simultaneous connectio
ns to the server and increase bandwidth.
However when doing so it is important to be able to identify which sockets
represent which client.
\end_layout
\begin_layout Standard
The proposed handshake would be initiated by the client when connecting
to the server, at this point they include which source they should be grouped
with using an integer ID.
The server groups the socket as such and, if one has not been received,
responds with a random identifier string that should be used across all
sockets to identify the client.
Should the newly connected socket be for a client that is already connected
then the client will respond with it's existing identifier to inform the
server that this ID has been ignored.
In doing so the client now has a method of identifying itself agnostic
of socket, and the server has a way of identifying the source which is
frame is representing.
\end_layout
\begin_layout Subsection
Deliverables and Additional Goals
\end_layout
\begin_layout Standard
At this point in the project it is worth considering the viability of the
final deliverables with relation to the time remaining.
Based on the work completed so far the original objectives of multi-source
holoportation remain viable with a round of complete testing defined and
employed.
\end_layout
\begin_layout Standard
This testing suite is yet to be defined but will comprise performance evaluation
for both the network and display aspects of the software.
\end_layout
\begin_layout Standard
Should the original specification be delivered and evaluated with time remaining
, additional goals and investigations should be examined.
Considering the design principle of network and presentation separation
in combination with the relevance of the technology to the spaces of AR
and VR, an interesting analysis could be the applicability of the multi-source
network developments to additional display methods.
Mobile AR and
\noun on
Hololens
\noun default
display for
\noun on
LiveScan
\noun default
have both been demonstrated and either could prove interesting when considered
in a multi-source context.
\end_layout
\begin_layout Subsection
Final Report Structure
\end_layout
\begin_layout Standard
The final report for the project will to an extent be based off of this
piece in terms of structure and content.
The literature review will be expanded to include an investigation of simultane
ous video streaming in order to contextualise the coming work on the network
layer of the application suite.
\end_layout
\begin_layout Standard
A results section will describe the quantitative and qualitative results
of the final product, these will then be evaluated and discussed in the
discussion section.
At this point a discussion can also be had about further developments that
can be made, both to the
\noun on
LiveScan
\noun default
codebase but also to the final developed version of this project.
The structure will be as follows,
\end_layout
\begin_layout Itemize
Title Page
\end_layout
\begin_layout Itemize
Abstract
\end_layout
\begin_layout Itemize
Table of Contents
\end_layout
\begin_deeper
\begin_layout Itemize
Including lists of figures, code listings
\end_layout
\end_deeper
\begin_layout Itemize
Acknowledgements
\end_layout
\begin_layout Itemize
Introduction
\end_layout
\begin_layout Itemize
Literature Review
\end_layout
\begin_layout Itemize
Methodology and Developments
\end_layout
\begin_layout Itemize
Results
\end_layout
\begin_layout Itemize
Discussion
\end_layout
\begin_deeper
\begin_layout Itemize
A description of further
\end_layout
\end_deeper
\begin_layout Itemize
Conclusion
\end_layout
\begin_layout Itemize
References
\end_layout
\begin_layout Itemize
Appendices
\end_layout
\begin_layout Section
@ -1377,6 +1874,26 @@ Summary
Conclusions
\end_layout
\begin_layout Standard
Roughly halfway through the time span of the project, one of two aspects
of the development has been completed.
The native display methods have been extended to meet the deliverable specifica
tion allowing the display of multiple sources while also allowing arbitrary
placement and orientation within the display space.
\end_layout
\begin_layout Standard
From this point the network layer of the suite will be developed to also
match the specification, allowing clients to be grouped into sources for
polling and processing.
\end_layout
\begin_layout Standard
Following the development of the two, testing methodologies will be defined
and carried out to gather quantitative results for the final product.
A final report on the results will be available in May 2020.
\end_layout
\begin_layout Standard
\begin_inset Newpage pagebreak
\end_inset
@ -1396,9 +1913,71 @@ options "bibtotoc"
\end_layout
\begin_layout Standard
\begin_layout Section
\start_of_appendix
\begin_inset FloatList figure
Existing Data Structures
\begin_inset CommandInset label
LatexCommand label
name "sec:Existing-Data-Structures"
\end_inset
\end_layout
\begin_layout Standard
\begin_inset CommandInset include
LatexCommand lstinputlisting
filename "../snippets/point2f.cs"
lstparams "language={[Sharp]C},keywordstyle={\\color{blue}},commentstyle={\\color{magenta}\\itshape},emphstyle={\\color{red}},basicstyle={\\ttfamily},stringstyle={\\color{green}},identifierstyle={\\color{cyan}},caption={Cartesian coordinate in 2 dimensions}"
\end_inset
\end_layout
\begin_layout Standard
\begin_inset CommandInset include
LatexCommand lstinputlisting
filename "../snippets/point3f.cs"
lstparams "language={[Sharp]C},keywordstyle={\\color{blue}},commentstyle={\\color{magenta}\\itshape},emphstyle={\\color{red}},basicstyle={\\ttfamily},stringstyle={\\color{green}},identifierstyle={\\color{cyan}},caption={Cartesian coordinate in 3 dimensions}"
\end_inset
\end_layout
\begin_layout Standard
\begin_inset CommandInset include
LatexCommand lstinputlisting
filename "/home/andy/uni/dissertation/snippets/affinetransform.cs"
lstparams "language={[Sharp]C},keywordstyle={\\color{blue}},commentstyle={\\color{magenta}\\itshape},emphstyle={\\color{red}},basicstyle={\\ttfamily},stringstyle={\\color{green}},identifierstyle={\\color{cyan}},caption={Affine transformation matrix with translation}"
\end_inset
\end_layout
\begin_layout Section
New Data Structures
\end_layout
\begin_layout Subsection
Frame
\begin_inset CommandInset label
LatexCommand label
name "subsec:Frame"
\end_inset
\end_layout
\begin_layout Standard
\begin_inset CommandInset include
LatexCommand lstinputlisting
filename "../snippets/frame.cs"
lstparams "language={[Sharp]C},keywordstyle={\\color{blue}},commentstyle={\\color{magenta}\\itshape},emphstyle={\\color{red}},basicstyle={\\ttfamily},stringstyle={\\color{green}},identifierstyle={\\color{cyan}},caption={Point cloud with Client ID}"
\end_inset

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@ -0,0 +1,21 @@
[Serializable]
public class AffineTransform
{
public float[,] R = new float[3, 3];
public float[] t = new float[3];
public AffineTransform()
{
for (int i = 0; i < 3; i++)
{
for (int j = 0; j < 3; j++)
{
if (i == j)
R[i, j] = 1;
else
R[i, j] = 0;
}
t[i] = 0;
}
}
}

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@ -0,0 +1,21 @@
public struct Frame
{
public List<Single> Vertices;
public List<byte> RGB;
public List<Body> Bodies;
public int ClientID;
public List<AffineTransform> CameraPoses;
public Frame(List<Single> vertsin,
List<byte> rgbin,
List<Body> bodiesin,
int clientID,
List<AffineTransform> cameraPosesin)
{
Vertices = vertsin;
RGB = rgbin;
Bodies = bodiesin;
ClientID = clientID;
CameraPoses = cameraPosesin;
}
}

5
snippets/point2f.cs Normal file
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@ -0,0 +1,5 @@
public struct Point2f
{
public float X;
public float Y;
}

6
snippets/point3f.cs Normal file
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@ -0,0 +1,6 @@
public struct Point3f
{
public float X;
public float Y;
public float Z;
}

225
uml.xmi Normal file
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@ -0,0 +1,225 @@
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