science

Projector camera systems

Projector camera systems is a science 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 Projector camera systems rather than just read about it. In short: Projector-camera systems (pro-cam), also called camera-projector systems, augment a local surface with a projected captured image of a remote surface, creating a shared workspace for remote collaboration and communication. Projector-camera systems may also be used for artistic and entertainment purposes.

Key takeaways

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

Reference excerpt

Projector-camera systems (pro-cam), also called camera-projector systems, augment a local surface with a projected captured image of a remote surface, creating a shared workspace for remote collaboration and communication. Projector-camera systems may also be used for artistic and entertainment purposes. A pro-cam system consists of a vertical screen for implementing interpersonal space where front-facing videos are displayed, and a horizontal projected screen on the tabletop for implementing shared workspace where downward facing videos are overlapped. An automatically pre-warped image is sent to the projector to ensure that the horizontal screen appears undistorted.

Examples Pro-cam systems create a shared workspace between users with overlapping video technique which was invented by the researcher John Tang in Xerox PARC, 1991. Digital Desk and Double Digital Desk was the first prototypes of pro-cam systems developed by Xerox Research Center Europe. ShareTable was the first prototype which is deployed in the field and tested with real users created by Lana Yarosh et al. at 2009. Microsoft Research has introduced the IllumiShare system which was an application of pro-cam systems at 2012. HP Inc. created a consumer pro-cam product named Sprout and released to market at the end of 2014.

References

Illustrations

Worked examples

Example 1 — a first encounter with Projector camera systems

Start with the simplest possible case. Write down what Projector camera systems claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, 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 Projector camera systems 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 Projector camera systems 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 Projector camera systems

In research: Projector camera systems appears in science 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 Projector camera systems 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: Projector camera systems is common in secondary-school and first-year university syllabi. It links to neighbouring topics Projectors, so understanding it makes those chapters shorter.
In everyday life: Look for Projector camera systems 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 Projector camera systems in 20 minutes

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

Frequently asked questions

What is Projector camera systems in simple terms?

Why does Projector camera systems matter?

Because it connects several science 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 Projector camera systems?

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 Projector camera systems.