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ABSTRACT
Mind reading is a way to detect or infer the
other’s mental states. The simplest way for mind
reading can be done by simply seeing and
understanding the facial expression. For
example a smile can give us an expression of
happiness. But now it may be possible that not
only one human can understand other’s mental
states but also a computer might understand the
mental states of a person. This paper describes
the ways how a computer might infer the mental
state of a person and thus becomes the mind
reading computer. This paper emphasize on the
ways by which a computer might infer the
mental state, one method is by facial expression
analysis (FEA) and the second one by using a
futuristic headband.
INTRODUCTION
Mind reading computer may be defined as a
machine that infers the human being’s mental
states. The understanding of a human’s thoughts
is one of the most complex tasks. No one knows
what a person would do in the upcoming second
by executing his present thoughts or what would
a person thought about any other person or what
would a person desires and many more. But a
mind reading computer could give answer to all
these questions.
Mind reading computer infers the thoughts of a
human being based on various technologies for
example by scanning the facial expressions
along with head gestures and by identifying the
volume and oxygen level inside the blood which
is flowing in the vicinity of the brain. With exponential development in the technologies we
can say that in future we might have number of
technologies that will lead into making the
flawless mind reading computer.
The ability of mind reading by a computer can
provides us many applications in the field of
medical, crime and one’s life also.
MIND READING &NECESSITY OF MIND
READING
Mind reading may be defined as the inferring of
the human thoughts, emotions and desires etc.
First simplest step of mind reading is by simply
understanding the facial expression given by the
person as people express their mental states
mostly through facial expressions and gestures.
No matter whether they are interacting or not.
Our mental states shape the decisions that we
make, make us react the way we react in a
particular situation and thus affect our
performance. All over our thoughts are the
causes of all the things that are happening.
Imagine what happened if we have a computer
that can reads mind and after predicting the
mental states , if there is any wrong intention
possess by any person we can prevent it. And
what happened if a wrong intention can be
changed into good one by a computer. A
computer that can reads and moulds the
emotions into the required one, especially in
case of a criminal; here no need for a stringent
punishment rather a computer is required that
can change the mind and hence make the better
world than it is now. However, this technology
by computer, to change the mind according to a
desire is not established now. But in future it
might be developed some day. So for all this mind reading computer is just the basic step.
Also consider a situation where we are
surrounded with mobile phones, online services
and cars and the all these systems can read our
minds and react accordingly. It makes life so
easy as by just thinking we can order our system
to work accordingly. Moreover it becomes a
boom for a physically handicapped person
because he will able to drive a car, access online
services and mobile phones just by thinking. All
we can do is to give a mind reading machine that
will be able to read mind by scanning the facial
expression.
The mind reading computer system might also
be used to monitor and suggest improvements in
human-human interaction. The affective
computing group at the MIT Media laboratory is
developing emotional-social intelligence
prosthesis that explores new technologies to
improve people’s social interactions and
communication skills.
Thus mind reading is necessary for all this to
make happened.
MIND READING COMPUTER
The team member of University of
Cambridge had been working on a model of
mind reading in a computer laboratory and
has developed mind reading machines that
implement a computational model of mind
reading to infer mental states of human
being from their facial expressions and head
gestures.
The machine works by using digital video
cameras which analyzes a person’s facial
expression in real time and infer person’s
underlying mental state such as thinking,
confused, interested, bored, agreeing,
disagreeing, happy, sad and angry.
Prior knowledge of how particular mental
states are expressed by the facial expressions
and head gestures and storing it in the
database of the machine and then by matching to give the mental state. The
model represents these at different
granularities, storing with face and head
movements and representing those in 3D
space to form a clear model of which
particular mental state is represented by
which facial expressions and head gestures.
Software from Navension identifies 22
feature points on the face and tracks them in
real time. Movement, shape and color are
the parameters which are then analyzed to
identify gestures like a half closed eyes and
open mouth. Combination of these occurring
over real time indicates mental states. For
example inner raise of eyebrows might
indicate thinking.
FACIAL ACTION UNIT ANALYSIS
It is done by facial Action Coding System
(FACS) [Ekman, 1978]. It could analysis
facial action units by examining pitch up
and down, yaw left and right, lip pull, lip
pucker, depress and stretch, mouth stretch,
jaw drop, lips apart, eyebrow raise inner and
outer etc.
HEAD POSE ESTIMATION
It use expression – invariant feature points to
estimate pitch (500
), yaw (500
) and roll(300
) for
example estimation of head yaw using ratio of
left point to right point of eye widths and
estimation of head roll using the angle between
the two inner eye corners.
Facial actions are identified from feature points
comprised of motion, shape and color
descriptors. Motion and shape-based analysis are
particularly suitable for a real time video system
color based analysis is computationally efficient
and is invariant to the scale or viewpoint of the face, especially when combined with feature
localization (i.e. limited to regions already
defines by feature point tracking).
For lip shape tracking that identifies for example
lip corner pull(smile)and lip pucker the polar
distance between each of the two mouth corners
and the anchor point is computed. The average
percentage change in polar distance calculated
with respect to an initial frame is used to discern Color descriptors can tell that whether the mouth
is closed or open by differentiating the teeth and
aperture by different color. For example teeth
are represented by green color and aperture is
represented by red color.
Another way of mind reading could be
accomplished by using a futuristic headband
which is to be wears over the head.
In this way measurement of volume and oxygen
level of the blood around the person’s brain is done, using technology called functional nearinfrared
spectroscopy (FNIRS).
The futuristic headband sends light in infrared
spectrum that penetrates the tissues of the head
where it is absorbed by active, blood – filled
tissues. The headband then measures the light
which was not absorbed, and then making the
computer to measure the metabolic activities
that the brain is making. The results are often
compared to an MRI.
Another way or we can precisely say another
technology of mind reading is existed in which
electroencephalograph, a device used by medical
researchers to pick up electrical currents from
various parts of the brain. If we could learn to
identify brain waves generated by specific
thoughts, emotions or desires, we might be able
to teach same skill to the computer.
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