Image Definition and 1000 Threads

Homework Statement I found that the blurred image is always presented by $$A=Ku+f$$, where u is the perfect image source, and the K is transformation (blurring, sampling) and f is the noising . The question I want to know is how can we find such K, or f when we blurred the image , for...

Homework Statement A point charge of 10 coulombs is placed at a distance d= 20cm from the centre of an earthed conducting sphere of radius a= 5cm.Find ① The maximum surface density of charge induced on the sphere. ② The force of attraction on the point charge ③ The Sphere is now Insulated...

Homework Statement Why does an image form when light rays meet in ray optics? Is there explanation to it? Homework Equations The Attempt at a Solution I thought of an explanation myself and thought that it cannot be explained just like many other things cannot be explained like...

Homework Statement . Let ##A \subset R^n## and suppose that for every continuous function ##f:A \to \mathbb R##, ##f(A)## is compact. Prove that ##A## is a compact set. The attempt at a solution. I've couldn't do much, I've thought of two possible ways to show this: One is to show that ##A##...

Visiting New Scientist website the following time lapse movie caught my eye, see, http://www.newscientist.com/article/dn24667#.Upe1pNJwq0I from, http://www.newscientist.com/ I get the emissions from the sun, the stars, and the comet, but what is in the movie that kind of looks like...

Homework Statement A man holds a double-sided spherical mirror so that he is looking directly into its convex surface, 44.8 cm from his face. The magnification of the image of his face is +0.22. What will be the image distance when he reverses the mirror (looking into its concave surface)...

Homework Statement For the series Σ_{n=1} ^{∞} {(4 – cos(n^2))/n^2} (this series can also be seen by looking at TheSeries.png.), which of the following is true?: A. This series converges. B. This series diverges. C. The integral test can be used to determine convergence of this...

How would I create a java program to display an image?

What is the image of the function f: R -> R, f(x) = (x-2)^4 I think [0,∞) Am I right?

Hi, I want to find out how thick/big/fat is the object in the image. For example, there is a tree in the image(photograph), I want to use MATLAB to calculate how big the tree trunk is. Problem: Find out the perimeter of trunk as shown in the first picture (named "perimeter.PNG". attached...

1. Make a sketch copy of the diagram below and indicate clearly the position and nature of the image formed by the mirror. Draw rays corresponding to light coming from the open circle, and mark any relevant angles. You can see the picture they mean in the attachment. 3. My attempt at the...

F:N*N -> R, F(x) = m^2 + 2n I think the answer is N. Am I right?

What is the image of the function f : Z*N -> R ; f(a,b)= a/b? I know the answer is Q (rational numbers) but I don't know how to find it.

Here's an image of Messier 45 from Oct 6th/2013.

I have the XRD image of a PZT thin film. While trying to analyze it with JADE software I can not find the proper space group.So it is not giving me the answer I am looking for. I assumed the crystal system to be cubic.

Homework Statement I'm working on a Matlab problem for a digital image processing class. The problem is to take an image, then take its 2D-FFT and offset the phase component by pi. Then to take the IFFT of the new DFT using the unmodified magnitude and modified phase. What I got was a...

I'm not sure if this question belongs here, if that is the case I'm sorry. I've been desperately trying to install IRAF on windows. Nothing seems to work. I've considered installing a Linux distro but since I'm using windows 8 that is not an option. So my question is: has anyone been able to...

Homework Statement Formulate an expression that gives the focal length of a corrective lens, to be used in conjunction with a fixed lens. You may assume that both lenses are on the same plane, i.e. that they are very close together. The corrective lens should allow an object at a specified...

Imagine mirror image of a cell - built from a scratch using mirror images (enantiomers) of molecules of the original cell. It should work as standard one, but use e.g. L-sugars instead of our D-sugars: article. Some possible applications: - doubling the space of possible enzymes we could...

I want to put an image in my research paper, I am using ACS citations with bibtex. I was wondering how I cite an image that is placed in the body of my research report? Like what would the bibtex entry be, and am I even allowed to do this with ACS?

Homework Statement The minimum storage capacity required to store the information in a digital radiographic exam that consists of a 1024 – 1024 matrix, 12 bit deep, acquired at 30 frames per second for 10 seconds is _____ megabytes. 1 37 600 695 2500 Homework Equations The...

I'm using a small b/w digital video camera and frame grabber to catch images of meteors in maybe a 15x15 degree area. Typically noise is introduced into the frames. It is desirable to determine if the image contains a meteor, and clean up the noise in the frames. What methodology is available...

This may seem like a silly question, but I was studying light some time ago, and I was wondering how a diminished image(using a lens) could be formed of an 'object' consisting of two point sources of light a Planck Length away. They cannot be closer in the final image, so do they become one?

When given an image of a scene of something like a hallway or road (looking down this hallway or road) a vanishing point can be determined. Also, the points on the image must lie on a certain line in the real world environment given by: x_{im} = f\frac{X}{Z} and y_{im} = f\frac{Y}{Z} where...

Homework Statement How far apart are an object and an image formed by a 72.4 cm focal length converging lens if the image is 2.54x larger than the object and is real? (in cm) Homework Equations m=-(di/do) m=f/(f-do) (1/di)+(1/do)=(1/f) The Attempt at a Solution I've...

https://en.wikipedia.org/wiki/Hough_transform http://www.codeproject.com/Articles/13615/How-to-deskew-an-image I follow the second link but since I am a complete novice in image processing, I am having a hard time to figure out what it is all about and how to determine the point to make the...

Hi, My paper has been accepted by a journal. However, I have a problem with the images... The reviewer says: "it seems that the authors are importing or inserting .png or .jpeg format pictures (Figure 2, 4 , 7, 8, 9 , 10, 11, 12). I would recommend saving them in a vector graphics format...

Hypothesis: Galaxies appear to rotate too fast because their own gravitational lens let's them appear bigger than they really are. Just an idea, do you think it could work ?

Homework Statement Find the correct image produced by the concave lens. F is focal length. Homework Equations If an object is placed between F and 2F, the image will be inverted, real, larger and beyond 2F. The Attempt at a Solution I choose the answer A. Is it correct? *Please...

Hi all, This is probably a silly questions, but I want to be sure :). I'm wondering if a real image, created by a convex lens, can appear larger than the lens diameter itself. As an example, I'm thinking about the following: - I have a an object of height h_0=7.76" (display size of...

Homework Statement An object is placed on the optic axis and in front of a converging lens of focal length 38 cm such that its image size is 1.5 times the object size. Calculate the distance of the image from the lens. Express your answer in centimeter. Homework Equations 1/f=1/di +...

Homework Statement A particle P is moving in a straight line with velocity u=10 m/s along the ground. Its line of motion makes angle θ=60° with the X axis drawn on the ground. A flat mirror oriented perpendicular to the ground as well as the X axis is moving with constant velocity of v=20...

Consider d map f:R^4 into R^2 defines by f(x,y,z,w)=(2x+y+z+w,x+z-w). find the image and the kernel, please include explanations...

Hi, I was wondering whether the following is true at all. The first isomorphism theorem gives us a relation between a group, the kernel, and image of a homomorphism acting on the group. Could this possibly also imply that there exists a surjective homomorphism either mapping the previous kernel...

Hi! I have two questions: 1) I'm a little confused about image formation. Suppose there's an illuminated object place in front of a mirror. The object has a rough surface causing a diffuse reflection so when lights hits the object, the rays will be scattered all around the room. Now the...

Homework Statement Water level in the tank is decreasing at a constant rate of 1 cm/s. A small metal sphere is moving downwards with a constant velocity of 5cm/s. Base of the tank is a concave mirror of radius 40 cm. Find the velocity of the image seen (refractive index of water=4/3)...

I was wondering if someone can tell me if my approach to the proof is a correct one. (rather than typing it all out here and making a mess of the notation, I typed it up in latex and did a screencap then put that on imgur, so the following link has the proof) http://i.imgur.com/gNFToKx.png

Homework Statement Assume an image file is sRGB under D65. Generate the image as it would appear under illuminant A ( a 171x1 matrix). Homework Equations effect of illuminant: B = LA where A is the a color matching function, L is a diagonalized version of illuminant A, and B is...

If an object moves towards us with constant velocity, its velocity is constant with respect to us. But when we view its image in stationary car rear view mirror (or any stationary mirror), its velocity is changes? Why and How?

Homework Statement As shown in the figure, a man is running towards left with constant velocity of 7 m/s. Also, a flat vertical mirror is moved to the right with constant velocity of 9 m/s. Calculate the relative velocity between the man and his image. Express your answer in...

I wish to create, in Mathematica, an image. I have a set of lines, for the sake of a test, let's use: {{10,0},{40,100}} {{20,0},{80,100}} Now I want my image to be 400x100 pixels, and the lines to appear as if their coordinates are those of the points in the image. If I do...

Hi, I'm trying to use image charges to find the force that apply on the following particle (on the attachment) , but it seems that I do something wrong - F=2q^2/(2a^2)-2cos(60)q^2/a^2 The gray section have 0 potential, so I've tried to put image charges like it is in the second attachment...

Question on Perfect Magnetic conductor. Are PMC always metal compound like Iron etc. That has high ##\mu##? So most of good magnetic conductor are themselves electric conductor? From articles I read: PEC ##\Rightarrow\;\hat n \times \vec E=0\;\hbox{ and }\;\hat n\times \vec H=\vec J##...

Homework Statement In ##E^3##, given the orthonormal basis B, made of the following vectors ## v_1=\frac{1}{\sqrt{2}}(1,1,0); v_2=\frac{1}{\sqrt{2}}(1,-1,0); v_3=(0,0,1)## and the endomorphism ##\phi : E^3 \to E^3## such that ##M^{B,B}_{\phi}##=A where (1 0 0) (0 2 0) = A (0 0 0)...

I was working on an image processing project a while ago and was specifically working with raster images in the Hue-Saturation-Value(HSV) image format. Each is determined by mathematical values of these (HSV) parameters. I also worked with other bases such as the Red Blue Green (RGB) format. Now...

Hello everyone, A friend of mine came up with this question in class and I really do not have a good answer. Suppose you have a convex lens that has been cut in half horizontally and the top half removed. The question is: Will the bottom half of the lens still form an image? I really...

Homework Statement An object 20 cm. to the left of a converging lens with focal point 0.3 cm is moved to the left at a constant 5 cm/s. How fast is the image moving? Homework Equations v = vo + at 1/f = 1/u + 1/v The Attempt at a Solution Since there is no acceleration, I got 5 m/s...

Here is the question: Here is a link to the question: Find vector that satisfies the linear transformation, linear algebra question, PLEASE HELP? - Yahoo! Answers I have posted a link there to this topic so the OP can find my response.

Homework Statement Three converging lenses of focal length 2.5 cm are arranged with a spacing of 2.2 cm between them, and are used to image an insect 2.3 cm away. Where is the image? Homework Equations 1/do + 1/di = 1/f The Attempt at a Solution I used the above equation to find...

Homework Statement Doing some practice problems to prepare for upcoming exam and ran across this: A real image is a. One in which light does not pass through the image point but appears to diverge from that point b. One for which the magnification equal 1 c. An excellent image d. An...