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Frequently Asked Questions

How do you do linear interpolation?

DAK Engineering
The following is part of the larger program that handles everything; as the "meat" of the algorithm. By the way, if you're using servos and not steppers to drive your machine, than I guess very little of what follows applies to you! The current version is a bit more sophisticated, but this is the basic idea... CONST outvalueX: ARRAY[1..6] of integer = (5, 4, 6, 2, 3, 1); outvalueZ: ARRAY[1.
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How do you do circular interpolation?

DAK Engineering
Of all the cans of worms in motion control, this is one of the wormiest!!! Instead of taking the multiple straight line "almost looks like a circle, but isn't" approach, I wrote the following, which works to the resolution of whatever machine it's on. It functions in much the same manner as the linear interpolation algorithm above in that it involves sequencing an "imaginary" point through space along an arc, and "blips" the axes forward when they need to be to keep up with this point.
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What is interpolation or interpolated image resolution?

Frequently Asked Questions of Digital Cameras & MP3s
Interpolation, also called resampling by those in the graphic arts and math fields, is a method used to increase or decrease the number of pixels in a digital image. Some digital cameras use interpolation to produce a sharper, clearer image than what was originally captured by the camera. Virtually all editing software uses some type of interpolation method to enhance your photographs.
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How do I do the natural spline interpolation?

nsplines - Natural spline curve interpolation
Invoke the function ns_create() on your input data matrix. This function returns a matrix containing interval borders and polynomial coefficients.
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What is the difference between the interpolation algorithms?

MadTracker - FAQ
Interpolation is required when a sample is played at a different speed. It tries to guess the values between two sample points in order to give a better curve in between these points. None: Nothing is done to improve the quality of the sample. It will just take the nearest value. Aliasing occurs. Linear: A line is drawn between sample points. This is a basic approximation and recommended for playback use. Cubic: A curve is drawn between sample points (four points are used).
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Is TF linear or non-linear?

The Fall - Last Days of Gaia
It is a non-linear game. And you're going to miss many quests, subquests, characters and side plots if you don't explore the world of The Fall. Of course, there's usually more than one way to solve a quest.
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What is a linear address?

DOS/4G and DOS/4GW FAQ: Pointer and Address Conversions
A linear address is an address that your program uses. Under DOS/4G and DOS/4GW, all pointers are 32-bits and are offsets from a selector that points to the first byte of memory. Another way of describing a linear address is that it is the address the CPU feeds to the memory paging system.
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What is a "linear" exposure?

GloriaMundi.org FAQ's
A linear risk is one where the change in the value of a position in response to a change in a market price or rate is a constant proportion of the change in the price or rate.
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How linear will the game be ?

UFO:Aftershock
The game will be fairly non-linear. You have a set goal in your campaign, but how you go about resolving that goal, is left to the players discretion. While the storyline itself remains static, there will be several ways which a player can accomplish his goals, some of these will be mutually exclusive.
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What is Linear Editing?

Continuum Resources
Linear editing is the traditional method of editing video tape. The simplest form of linear editing is called assemble editing or deck to deck. This is when you copy only the "good" parts of a tape over to a new tape. Today, linear editing means deck to deck or tape to tape. Linear Editing has been largely replaced by digital Non Linear Editing(NLE). We don't use any linear editing systems at Continuum; everything we do is digital and computer based.
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What is linear density?

m1
Linear density ?V mass per unit length; the quotient obtained by dividing the mass of a fibre or yarn by its length.
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What is Linear PCM?

Support - DVD Player F.A.Q.
Linear PCM is a signal recording format used in audio CDs. While audio CDs are recorded in 44.1 kHz/16 bit, DVDs are recorded in 48 kHz/16 bit up to 96 kHz/24 bit.
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What is a linear foot?

Money Saving Tips for Your Move and Moving FAQs
A linear foot is used to measure your loading space in the trailer - simply a foot (12 inches) in length. Keep in mind that for each foot in length, you have the full width (8 feet) and height (9 feet) of trailer space for loading. In summary, a linear foot is 1' x 8' x 9'.
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Can you explain the benefit of "Interpolation"?

CORS Faq's
The National Geodetic Survey (NGS) provides GPS observation data at certain sites with a 30 second sampling rate. This rate may too slow for some applications. When a non-default sampling rate is requested, NGS will use the 30-second data to generate a new RINEX-format file with interpolated GPS satellite observations at the user-selected rate. New code range (pseudorange), Doppler, carrier phase, and receiver clock offsets (if available) are interpolated.
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What is the difference between linear and non-linear?

Frequently asked questions by parents (Modernising Children'...
Both analogue and digital hearing aids can be linear or non-linear. With a linear response you get an equal increase in gain for all input levels. With non-linear, the gain changes with differing inputs, so that softer sounds are amplified more and louder sounds are amplified less.
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Is game plot linear or non-linear?

FREELANCER: Your tactical source
Dreamland is not RPG, so it is hard to talk about linearity or non-linearity. Non-linearity is nevertheless present, but in different form. It is part of game technology tree. Often, playing such a wide-scale game, you can miss some item, character or event. Next time playing a new game you can find yourself completing it with different arsenal and science level. This is game non-linearity allowing to replay the game again.
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How can I prepare for my edit in a linear suite?

Take One Digital Media - FAQs for Video & Film Production
Preparing for a linear edit requires a greater degree of pre-planning because changes to length are more time consuming and, therefore, more expensive. Once the editor begins to lay-in shots, it becomes increasingly difficult and expensive to go back and change one's mind (see "What is the difference between linear and non-linear editing?"). the beginning of the edit, its very helpful to go over your plans with the editor.
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What is a hair transplant (linear strip method and NeoGrafting or FUE)?

NuHart: Frequently Asked Questions
With hair transplantation, hair is moved from one area of the body (usually referred to as the “donor area”) and transferred to the thinning or balding area (recipient site). The transferred tissue is not "rejected" as it is not foreign tissue. The transplanted hair maintains its own characteristics; color, texture, growth rate, curl, etc. after transplantation and growth.
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What is the difference between a linear and a circular polarizer?

Frequently asked questions about polarizers and UV filters
If you use a standard linear polarizer with cameras that use auto-focus and/or auto-exposure, you may have problems. This filter may also cause trouble with manual cameras, if you're using TTL light measurement. A little dependent on the camera, your meter might go crazy. (It is not said you will get problems, only that you might get them.
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What is a linear actuator?

The Golem Project - FAQ
A linear actuator creates linear motion, like a piston. A linear actuator is best thought of as a mechanical muscle. The main difference between a biological muscle and a linear actuator is that a muscle can only contract, while the linear actuator and contract and expand (but often in biological muscles come in pairs so this is not really important difference).
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Should I do image processing operations on linear or nonlinear image data?

Gamma FAQ - Frequently Asked Questions about Gamma
If you wish to simulate the physical world, linear-light coding is necessary. For example, if you want to produce a numerical simulation of a lens performing a Fourier transform, you should use linear coding. If you want to compare your model with the transformed image captured from a real lens by a video camera, you will have to "remove" the nonlinear gamma correction that was imposed by the camera, to convert the image data back into its linear-light representation.
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What is Linear Programming?

Linear Programming FAQ - NEOS
For rigorous definitions and theory, which are beyond the scope of this document, the interested reader is referred to the many LP textbooks in print, a few of which are listed in the references section.) where x is the vector of variables to be solved for, A is a matrix of known coefficients, and c and b are vectors of known coefficients. The expression "cx" is called the objective function, and the equations "Ax = b" are called the constraints.
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What is interpolation and does it effect the quality of my photos?

Digital Camera Resource Page: Frequently Asked Questions
Interpolation is a fancy word for a computer "guessing". The only type of interpolation that anyone should be worried about is when an image is enlarged. Basically, when an image is enlarged, you end up with more pixels. But where did these pixels come from? Back in the old days, if you enlarged a 320x240 image to 640x480, the program would just double-up each pixel. Thus, the image looked blocky.
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What type of interpolation method is used to define the 3D functions in Leapfrog?

Leapfrog: Software - Frequently Asked Questions
Leapfrog version 1 uses the biharmonic radial basis function (RBF) interpolation method to construct a volume function from the input drillhole data. The mathematical nature of this method lends itself to fast interpolation of large datasets, but other forms of interpolation are nevertheless possible, including Kriging.
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Q5. Can I use bicubic interpolation to generate wallpaper?

Vidira, Inc. - FAQ
A5. Yes. Set wallpaper methods from the Tools menu feature Vidira enlargement, and while we don't recommend using bicubic interpolation for this purpose, you can do it. In the Resize dialog box (Image > Resize), check Keep Aspect Ratio, select Bicubic for enlargement method, enlarge the image so that it will cover the entire desktop, and save it (File > Save As).
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Q7. Why is Vidira enlargement slower than bicubic interpolation?

Vidira, Inc. - FAQ
A7. Bicubic interpolation, together with other filtering techniques, such as B-Spline and Lanczos, "blindly" interpolates between pixels regardless of the nature of the underlying image data. The Vidira method, on the other hand, examines local image structure and adjusts processing to preserve its characteristics in the enlarged image. Such an approach, while resulting in better quality enlargements, does require more computational resources than ordinary techniques.
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What's the advantage of natural spline curve interpolation over polynomial fitting?

nsplines - Natural spline curve interpolation
Polynomial fitting attempts to create one polynomial to represent the entire curve. The summary of the quadratic distances between the polynomial and the points is minimized. Depending on the polynomial's degree the distances between polynomial and given points differs, for higher degree polynomials you typically have to expect oscillations. Natural spline interpolation constructs a sequence of cubic splines, hitting all the specified points.
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Which interpolation method should I use for downsampling, bilinear or bicubic?

Video CD Authoring FAQ
The coefficients for linear (triangle or tent) decimation are all positive, meaning that it is purely a blur. However, some of the bicubic coefficients are negative, so cubic resampling will give you a mild sharpening effect. As a general rule, I choose linear resampling to reduce noise, but use cubic resampling if I have a good source, because it produces sharper output. Note that VirtualDub's cubic kernel is not the same as a cubic spline, which still contains only positive coefficients.
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Where is ???Fast In??? and ???Easy Curve Out??? interpolation?

FAQ - Adobe Premiere Pro - a Wikia wiki
The Premiere Pro 1.5 Help tutorial still mentions these as context menu options, although they have been replaced.
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