Image Definition and 996 Threads

hi! i need help with problem: Let F(u,v) be the Fourier transform of an M x N image f(x,y). Let g(x,y) be an image of dimensions (2 M) x (2 N) whose Fourier transform G(u,v) is defined as follows: What does the image g(x,y) look like in terms of f(x,y)? my solution ...

hello, i'm kinda new in this programming thingy so i hope you guys can help me. i wanted to code a program that can identify whether a banana is ripe or not. basically, i have two image of banana; one yellow in color and another one is green. so I'm thinking about using AI technique...

Q. If a boy is at a distance of 40m from a plane mirror and runs parallel to the plane of the mirror while maintaining the same distance from the mirror what will be the speed of the image and the boy. A. Same B. The boy has greater speed than his image C. The image has greater speed than the...

Homework Statement With a lens with f = 25 cm, we want to project an image that is 5 times bigger than object, so M = 5 - Find the image distance s' - Find the image height Hi Homework Equations 1/f = 1/s + 1/s' M = s'/s = Hi/Ho With: f = focus distance of lens M =...

I think understand the concept of the "method of images" to describe a conductor. The conductor has to be an equipotential or else electrons would be moving around inside it. This equipotential can be described by replacing the conductor with an image charge. For example imagine the field...

I have been having trouble with this for a long time 1st - How and Why is a image formed ? 2nd - If all objects reflect light why is the image not seen on all the objects Even walls reflect light but there is no image formation when light rays from an object reflect off an object and...

[b]1. f(x) = 1/4 (x - 1)^2 - 9. What is the image set of the function f? Express in interval notation. g(x) = 1/4 (x - 1)^2 - 9. (1 ≤ x ≥ 7). Specify the domain and image set of the inverse function g^-1, and find it's rule. I really don't understand what happens in these questions. I...

[PLAIN]http://img842.imageshack.us/img842/336/angleqj.png Lets say that the body has force F in the direction B(β). What is the formula that would let me calculate X velocity and Y velocity of the body? The formula should include all three factors, A(α), B(β), and F (force of the body)...

A concave lens always forms a virtual image (for a real object), will it always form a real image for a virtual object? (that is, when rays converge on it) If yes, why? If no, why?

Does anyone know of a good resource for these types of problems? I took an Intro to Real Analysis class as an undergrad and didn't do so well in it, but now I am working back through the book, and it is making A LOT more sense than it did back then. However, I was looking for some worked...

Homework Statement You have been tasked with the design of a new far-field, high resolution imaging system to be placed on the Hubble Space Telescope. This system will be used for taking deep space astronomical images with an exposure adjustable between 10 minutes and 24 hours based on the...

Is it possible to scan humans with ultra low frequencies to study medically one's physique?

I apologize if the breadth of this question requires a response beyond what anyone is willing to contribute. I've started researching optics ( of which I have little knowledge ) and feel immediately overwhelmed. Problem Using a DSLR ( with a DX size sensor ) and preferably the available lens...

Homework Statement Let (X,d) and (Y, p) be metric spaces and f : X -> Y a function. Prove that f is continuous at p-0 if and only if for every ε > 0, there exists a δ > 0 so that the image of Bd(p-0; δ) is contained in Bp( f (p-0);ε). Homework Equations The Attempt at a Solution...

Is it true? http://tv.adobe.com/watch/max-2011-sneak-peeks/max-2011-sneak-peek-image-deblurring/ Worth a look.

Homework Statement For the linear transformation T: R4 --> R3 defined by TA: v -->Av find a basis for the Kernel of TA and for the Image of of TA where A is 2 4 6 2 1 3 -4 1 4 10 -2 4Homework Equations Let v = a1 b1 c1 a2 b2 c2 a3 b3 c3 a4 b4 c4 The...

Homework Statement Matrix A = 0 1 0 0 0 1 12 8 -1 Let E1 = a(A)(A+2I)2 Let E2 = b(A)(A-3I) For each of these, calculate the image and the kernel Homework Equations I found a(A) to be 1/25 and b(A) to be 1/25*(A-7I) Also, if I am not mistaken, I think KernelE1 =...

Hi, I have a movie that contains a particle moving from one end of a channel to another end. The velocity of the particle is super-fast. I need to know how I can estimate the time and pictorially (like using a histogram--similar to plotting the heart pulses of a person) be able to tell when the...

Homework Statement If T:V\rightarrow V is linear, then Ker(T^2)=Ker(T) implies Im(T^2)=Im(T). Homework Equations Let T:V\rightarrow V be a linear operator such that \forall x\in V, T^2(x)=0\Rightarrow T(x)=0 (Ker(T^2)=Ker(T)). Prove that \forall x\in V, \exists u\in V\ni...

Homework Statement As per the attached picture, we are basically trying to find out the time interval between the instants that the particle (black dot) is in the first region of interest and the instant that it is in the second region of interest. i have a video in which the particle in...

Homework Statement T : R^{3} -> R^{3} is a linear transformation. We need to prove the equivalence of the three below statements. i) R^{3} = ker(T) \oplus im(T); ii) ker(T) = ker(T^{2}); iii) im(T) = im(T^{2}). Homework Equations R^{3} = ker(T) \oplus im(T), if for all v \in...

An object is 9.79 cm from the surface of a reflective spherical Christmas-tree ornament 8.96 cm in diameter. What is the position of the image? Answer in units of cm I know that i need the radius of curvature to find the position of the image, but I'm not sure how to get that from the...

Google image search is the best place when searching for images on something. But I have always thought, "What if I have an image and I need to find out what it is about." Shazam works well for audio, but Google has finally done it with images. I noticed a week ago that you could drop images in...

After reading about how dithering works for created the sense of a larger range of colors from a small color palette, it makes sense how it works, but how in the world do computers figure out how to dither an image so that it looks correct to us? Is the fact that blue and red combined create...

Please provide your idea and picture of the most beautiful physics object.

One image should be formed by rays that go directly through the bubble and another image is formed by reflected light that hits the bubble. n1 = 1 n2 = 1.5 R = -7.5 CM so = 5 cm If n1 = n2, then si would equal 15 cm as measured from the second vertex on the concave surface. However, they're...

Homework Statement An object is situated at various points relative to V. The light is then reflected by the mirror, and the final image is viewed by the observer. http://www.flickr.com/photos/55153239@N03/6196518731/ Homework Equations 1/s + 1/s' = 2/R na/s + nb/s' = (nb-na)/R...

"real" image from concave mirror Ok so in we are currently doing mirrors and reflections in physics and from what I learned there are 2 types of images: real and virtual. I know that a virtual image is what you see INSIDE the mirror; but what does a real image looks like? I can't find anything...

The theory seems simple. Light strikes the film in a camera, or a CCD and the different regions of intensity are recorded. But what I can't get my head over, is how a different portion of the film strip or CCD *knows* which part of the image it is supposed to be representing. For example, if...

Hi I'm not sure if anyone here has used ISIS image subtraction program written by Alard, available online at http://www2.iap.fr/users/alard/package.html, but I'm hoping someone has. I'm currently working on a bit of research that requires PSF matching to work, and this program should easily...

Hi , I wonder why the image of the south pole in google Earth is blurred ?

I am studying the very first chapter of analysis, but can't quite get through this problem: Prove f −1(f(A)) ⊇ A Prove f(f −1(B)) ⊆ B

Help in MATLAB image processing ? hello friends...i save my picture named "manish.tiff" in MATLAB directory...then opening this with command named rgb =imread('manish.tiff') in command window...but it shows error... below is the error i m getting. (? Error using ==> imread File...

I have a question and I would like some help. Assuming mirror image vehicles hitting at 65mph. Is the force exacted on each vehicle equal to 130mph or 65 mph. My assumption is that it would be the same as hitting an inelastic brick wall.. Thank ya'll in advance..

Homework Statement A science museum has created a huge concave mirror with a focal length of 5 m, and mounted it so that it covers the entire wall at one end of a long hallway. If you stand on a center line painted down the middle of the hallway, you're on the mirror's principal axis. You...

Homework Statement An object 2.71 * 10-2m tall is 0.14m in front of a convex mirror that has a radius of curvature 42cm. Calculate the position and height of the image, is the image inverted or upright? Homework Equations Well, I've stated that I'm using the ray model of light. As far...

then through a plane mirror (I could put that all down in the title!) Homework Statement A bright object 1 cm tall is located at x = -6 cm. There is a thin lens atx = 0 with focal length f = 4 cm, and a plane mirror located at x = 7 cm. Light from the object passes through the lens, reflects...

Homework Statement so if the original object is 4.6 cm tall located at x = 0 and it's a concave mirror distance from C to the object is 16 cm and Radius of the mirror is 12 cm The Attempt at a Solution to find the position of x image i got 9.6 cm then for magnification i...

how can i work with images in visual studio c++? i want to work with .jpg images. So how do i store them and access them?

Homework Statement A lens forms an image of an object. The object is 16 cm from the lens. The image is 12 cm from the lens on the same side as the object. (a) What is the focal length of the lens? Is the lens converging or diverging? (b) If the object is 8.5 mm tall, how tall is the image...

Hi, Just came across this as an image in a book/monograph and it looks very MATLAB-esque, except I cannot figure out how to possibly create a circular image Say I have a 500x500 matrix and want to plot it as a colour image in this way. Does anyone know how? I've been re-reading the...

Hi, I'm attempting to determine the approximate pixel coordinates of cataloged stars within the field of view of a spacecraft camera. I'm given the right ascension and declination of the center of the camera field of view and its dimensions. I've used that information to filter a star...

Okay, so my first essay was swallowed by some impromptu logging out, so I'll be shorter and sweeter this time. I want to make a robot that accepts commands from a computer via USB. It will tell the robot basic commands like "next" and "back" with the bot figuring out what motors to move for...

I am having trouble understanding how mirrors have only either a virtual image or a real image. Take a concave mirror for example. If the object is placed between the mirror and the focal point, then there is a magnified virtual image. If the object is placed between the focal point and the...

THIS WAS SOVLED Homework Statement My book did a very bad job explaining the matter. I have no idea what function(s) I should even use to solve this problem using the MRI data that comes with MATLAB An MRI visualization example is shown in the help tutorial. Copy and paste the commands into...

Hi, I am working on binary (greyscale) image manipulation through C++ arrays. At school we use Photoimpact 7 to see the resulting image in .bin format... is there any free application i can use to do the same at home?

Homework Statement 13.2 A quadratic Julia set has the form z(n+1)=z(n)^2+c The special case where c=-.123+.745i is called Douday's rabbit fractal. Follow example 13.1, and create an image using this value of c. For the Madelbrot image, we started with all z-values equal to 0...

Hi all, Was told by an engineer at a tech startup to inquire here for anyone interested in discussing/solving/working on this problem. Basically, I am looking to crawl and index all images on a certain part of the web (yet undefined which part) and to be able to run a reverse image search...

What is Image Rejection Ratio (IRR) and How to calculate an Image Rejection Ratio (IRR)?

Homework Statement [PLAIN]http://img863.imageshack.us/img863/6634/quiz14.jpg Homework Equations None The Attempt at a Solution I say B or E but I can't find a reason to choose. I ignore the solution.