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Machine perception

Machine perception is a engineering topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Machine perception rather than just read about it. In short: Machine perception is the capability of a computer system to interpret data in a manner that is similar to the way humans use their senses to relate to the world around them. The basic method that the computers take in and respond to their environment is through the attached hardware.

Machine perception — main illustration
Machine perception — illustration

Key takeaways

  • Machine perception belongs to engineering; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect Machine perception to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of Machine perception from memory before moving on to harder problems.

Reference excerpt

Machine perception is the capability of a computer system to interpret data in a manner that is similar to the way humans use their senses to relate to the world around them. The basic method that the computers take in and respond to their environment is through the attached hardware. Until recently input was limited to a keyboard, or a mouse, but advances in technology, both in hardware and software, have allowed computers to take in sensory input in a way similar to humans. Machine perception allows the computer to use this sensory input, as well as conventional computational means of gathering information, to gather information with greater accuracy and to present it in a way that is more comfortable for the user. These include computer vision, machine hearing, machine touch, and machine smelling, as artificial scents are, at a chemical compound, molecular, atomic level, indiscernible and identical. The end goal of machine perception is to give machines the ability to see, feel and perceive the world as humans do and therefore for them to be able to explain in a human way why they are making their decisions, to warn us when it is failing and more importantly, the reason why it is failing. This purpose is very similar to the proposed purposes for artificial intelligence generally, except that machine perception would only grant machines limited sentience, rather than bestow upon machines full consciousness, self-awareness, and intentionality.

Machine vision

Computer vision is a field that includes methods for acquiring, processing, analyzing, and understanding images and high-dimensional data from the real world to produce numerical or symbolic information, e.g., in the forms of decisions. Computer vision has many applications already in use today such as facial recognition, geographical modeling, and even aesthetic judgment. However, machines still struggle to interpret visual impute accurately if it is blurry or if the viewpoint at which stimuli are viewed varies often. Computers also struggle to determine the proper nature of some stimulus if overlapped by or seamlessly touching another stimulus. This refers to the Principle of Good Continuation. Machines also struggle to perceive and record stimulus functioning according to the Apparent Movement principle which is a field of research in Gestalt psychology.

Machine hearing Machine hearing, also known as machine listening or computer audition, is the ability of a computer or machine to take in and process sound data such as speech or music. This area has a wide range of application including music recording and compression, speech synthesis and speech recognition. Moreover, this technology allows the machine to replicate the human brain's ability to selectively focus on a specific sound against many other competing sounds and background noise. This ability is called "auditory scene analysis". The technology enables the machine to segment several streams occurring at the same time. Many commonly used devices such as a smartphones, voice translators and cars make use of some form of machine hearing. Present technology still has challenges in speech segmentation. This means it is occasionally unable to correctly split words within sentences especially when spoken in an atypical accent.

Machine touch

Machine touch is an area of machine perception where tactile information is processed by a machine or computer. Applications include tactile perception of surface properties and dexterity whereby tactile information can enable intelligent reflexes and interaction with the environment. Though this could possibly be done through measuring when and where friction occurs and also the nature and intensity of the friction, machines however still do not have any way of measuring few ordinary physical human experiences including physical pain. For example, scientists have yet to invent a mechanical substitute for the Nociceptors in the body and brain that are responsible for noticing and measuring physical human discomfort and suffering. Researchers are exploring ways to combine tactile sensors with machine learning algorithms to approximate human-like touch perception, enabling robots to handle delicate objects, detect texture differences, or respond adaptively to environmental changes. Emerging applications include robotic surgery , prosthetics with sensory feedback, and haptic interfaces in virtual reality, which aim to provide more immersive and precise interaction between humans and machines.

Machine olfaction Scientists are developing computers known as machine olfaction which can recognize and measure smells as well. Airborne chemicals are sensed and classified with a device sometimes known as an electronic nose.

Machine taste

… excerpt ends here. Continue reading the full article.

Illustrations

Machine perception: Researchers from the Agricultural Research Service use an electronic tongue.
Researchers from the Agricultural Research Service use an electronic tongue.

Worked examples

Example 1 — a first encounter with Machine perception

Start with the simplest possible case. Write down what Machine perception claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In engineering, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Machine perception before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Machine perception ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Machine perception

In research
Machine perception appears in engineering research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry
Engineering practice reuses Machine perception in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom
Machine perception is common in secondary-school and first-year university syllabi. It links to neighbouring topics Artificial intelligence, Artificial intelligence engineering, so understanding it makes those chapters shorter.
In everyday life
Look for Machine perception outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Machine perception in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Machine perception means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain Machine perception out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Machine perception in simple terms?

Machine perception is the capability of a computer system to interpret data in a manner that is similar to the way humans use their senses to relate to the world around them. The basic method that the computers take in and respond to their environment is through the attached hardware.

Why does Machine perception matter?

Because it connects several engineering ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Machine perception?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Machine perception.

Tags

  • Artificial intelligence
  • Artificial intelligence engineering

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