Image Definition and 996 Threads

what are the different kinds of input can be given to make a pose graph?

Hi All, It is quite familiar the result bellow concerning the image of an object when it is on the focal point of a concave mirror (ref: http://www.physicsclassroom.com/Class/refln/u13l3e.cfm): "When the object is located at the focal point, no image is formed. (...) light rays from the same...

Homework Statement The image of a linear transformation = columnspace of the matrix associated to the linear transformation. More specifically though, given the transformation from Rn to Rm: from subspace X to subspace Y, the image of a linear transformation is equal to the set of vectors in X...

I suppose you are all familiar with the standard image charge problem of calculating the electric potential for a point charge above a grounded conducting plane at y=0. In this case you solve the problem using the method of images. I have a slightly problem. Rather than having an infinitely thin...

I was reading my physics book and I didnt understand how can a image formed at infinity does not appear to us as infinitely large. The book says that lateral magnification is not valid in this case. So what really defines how large a image is?

in optical stores.. you can see polarized sunglasses test card with image (like boat or trees). when you wear the polarized sunglasses, you can see the image that you won't see with normal eyes or normal glasses. i know polarized sunglasses work by filtering and seeing only the vertical light...

The question: Let f: G -> H be a homomorphism of groups with ker(f) finite, the number of elements being n. Show that the inverse image is either empty or has exactly n elements. My work so far: Let h be eH (identity on H). Then the inverse image is ker(f) so has n elements, which makes it...

An object is within a glass sphere of radius R with a refractive index of 1.5 . I'm trying to calculate the displacement of the virtual object relative to the actual when viewed from the side, such that the refracted ray emanating from the object becomes horizontal. I would like to know S (the...

A screen is placed 90cm from a object. The image of the object on the screen is formed by a convex lens at two different locations separated by 30cm. The focal length of the lens is what?

Hello, I just was looking for possible information in the field of imaging quality assurance. I was wondering if their were any predominant scripts or papers on the subject of detecting the quality of an image. I know measuring how "good" an image is incredibly qualitative however, there are...

I am new to image processing and going serious from now on (as part of my research). I am a Mac user. What program is the best for image processing? What the difference between Xcode and Microsoft Window Visual, which one is better and does OpenCV can works with both of them? What kind of...

The lens and mirror in the figure below are separated by d = 1.00 m and have focal lengths of +77.9 cm and -59.0 cm, respectively. An object is placed p = 1.00 m to the left of the lens as shown. i need to find the final object distance and have no idea what am i doing wrong. I am just using the...

Mod note: Moved from Precalc section 1. Homework Statement Given l : IR3 → IR3 , l(x1, x2, x3) = (x1 + 2x2 + 3x3, 4x1 + 5x2 + 6x3, x1 + x2 + x3), find Ker(l), Im(l), their bases and dimensions. My language in explaining my steps is a little sloppy, but I'm trying to understand the process and...

Homework Statement Given the linear transformation l : R2 → R2 , l(x, y) = (2x − 2y, −x + y), write the matrix associated to l with respect to the standard basis of R2 , find Kerl, I am l, its bases and dimensions. Find all vectors of R2 that are mapped to (4, −2). Homework Equations Ax=0...

Hello, I have a typesetting software which can export typeset math as normal, nice looking black LaTeX text. However it always puts it on a white background. How can I change the background color of an image (png or jpeg) without changing the black text contained int he image? Should I write...

Hello, I saw a picture online and I'm trying to figure out what it means. Here is the photo. Can someone please decipher? It looks like it could have been been printed on a piece of fabric, maybe a T-shirt. Thanks in advance!

Homework Statement [/B] If A is an mxn matrix, show that for each invertible nxn matrix V, im(A) = im(AV) Homework Equations none The Attempt at a Solution I know that im(A) can also be written as the span of columns of A. I also know that AV = [Av1 Av2 ... Avn] so im(AV) is the span of...

How one can analyse an image of a solid material obtained with an optical microscope ?

I was wondering if there are any images of the Earth in 3D and flat, side projection that would show what the Earth looked like with all of the water removed and only the deep troughs and high plateau's remaining? The reason I ask is in reference to KIC 8462852. Would it be possible for a large...

I read about how MRI works briefly, by flipping the water molecules using a magnetic field to the correct state then send the radio wave to these atoms and have it bounces back to be received by receiver coils and apply Fourier Transform to figure out the imaging. My question is, how does...

Homework Statement The focal length of the objective lens is 25 mm, that of the eyepiece lens is 73 mm , and the two lenses are 200 mm apart. The object is 30 mm away from the objective lens. What is the image distance relative to the eyepiece lens? What is the overall magnification of this...

In most (perhaps all) books it was mentioned that intersection of the light from the object when reflected by the mirror or refracted by a lens intersect at a particular point. That point when traced till the principal axis gives the image. (Provided object lies on the axis). I do not understand...

Homework Statement A compound microscope has an objective of focal length 12 mm and an eyepiece of focal length 50 mm. The lenses have a separation of 90 mm and an object of height 0.3 mm is placed 15 mm from the objective. Calculate: (a) the distance of the intermediate image from the...

Is there a computer algorithm that can determine if a person it moving their right arm or there feet, or if they are running or not ?

Hi, I am learning about the method of image charges, but am struggling to sufficiently justify my answer. It appears to be correct, though it quite possibly isn't... 1. Homework Statement (please see attached item) Two semi-infinite grounded conducting planes (the shaded region in the...

I am a self-learner using textbooks. For example, I am using Spivak Calculus. I am working out a textbook problem in my notebook or I am writing down the intricacies of the proofs in the notebook. I have the Camscanner Android app in my mobile. I take photos of my working-out and edit it using...

[FONT=Arial]Hello guys. I want to ask something about simple spatial resolution manipulating just by using c language. I have done my programming below, it managed to be compiled but for some reasons the program stucked in the middle when I try to run it. Really hope you guys can help. I am...

At work, I have my plastic cheap blinds shut in the orientation of siding on a house. My office is only lit by a lamp. Outside is a sunny day. From my view, directly infront of the window, sitting down, facing north, around mid to late day is of vauge reminisce of clouds in the blue strips of...

The classical problem of the image method is: An infinite conducting and grounded (V=0) plate is on the xy plane. A charge ##q## is above it (we can think that it lies on the #z# axis). Knowing that ##V \to 0## as you move far away from the charge and that ##V=0## on the plane find the...

The question posed: "An object is located to the right of a mirror that in concave in its [the object's] direction. If the object sits on the focal point of the mirror, what answer best describes the image formed?" Our class is united in the notion that as the rays would be parallel...

Homework Statement An observer looks at an object of height 2 cm through a plane-convex lens of radius 20 cm and refraction index 1.5. There's a concave mirror of radius 30 cm 40 cm behind it, and the object is at the same distance of both the lens and the mirror. Find the images formed by the...

I am creating a gray-scale image of a 2000*2000 matrix using mat2gray and imshow command.But highest number of matrix entries that imshow can implement is 500*500 approximately.After that it shows------ "Warning: Image is too big to fit on screen; displaying at 8% > In...

I've been reading a book on linear algebra. It talks about finding the the basis of kernel and image of a linear transformation. I understand how to find the basis of the kernel, but I don't understand how to find the basis of the image. Could someone please explain a method of doing it? Thank you!

Hello, (I am new here, so hopefully this is the right location to ask my question. please let me know if there is more relevant forum) I am trying to understand 2 situations: A) I have an object, lens and a detector. The detector is at the focal plane of the lens. I am reducing the aperture...

I can't understand how eye actually works. From what I understand when I look at 2 objects of the same size The object that is further is smaller in the final image because light rays reflected from it take smaller surface at the retina (Here B is smaller than A because rays take less surface at...

Assume that I have a light bulb with luminous emittance of 160000lux (16ev), and a gray wall with luminous emittance of 300lux (7ev). I take the photo of this bulb and this background. Is there any approximate formula to estimate the gray level or RGB value of the bulb and the background in the...

hi guys I have been having a bit of trouble with this one and I am a bit all over the place. I know the things like setting up pointers, 2-d array, reserving stack frame space, having offsets. but is printing an image very different from printing a pixel or printing an integer? Also if I need to...

Alright, so I programmed a fractal in emacs and used the terminal on my mac to compile it and it compiles and everything but it outputs the coordinates. I want to output a image from my fractal program so could you guys help me out with that? Any advice would be awesome

Problem: Given $W = \{z: z=x+iy, \ y>0\}$ and $g(z) = e^{2 \pi i z},$ what does the set $g(W)$ look like, and is it simply connected? Attempt: $W$ represents the upper-half complex plane. And $$g(z) = e^{2 \pi i (x+iy)} = \cdots = e^{-2\pi y}(\cos (2 \pi x) + i \sin (2 \pi x)).$$ (Am I on the...

I know from the Fourier Analysis that any signal can be represented as summation of elementary signals i.e. basis functions .Likewise,any image can be represented as summation of Basis images. Is there any available code, or even an algorithm, that would allow me to compute Basis images of an...

I cam across this picture from the Rosetta mission the other day. You'll notice the sun is illuminating the right hand side of the comet. Additional the tail is coming off the right hand side. This goes against what I've been taught about comets in that the solar wind pushes the tail the...

I have computed magnitude and phase spectrum of very famous image of cameraman using fft function in MATLAB.Here,we get magnitude and phase spectrum of the whole image. But I want to find phase values of the neighboring pixels . So if given gray scale image is of dimensions 256*256 and if I...

I am beginer in image processing. Any signal whether it is 1D,2D or any multidimensional signal can be represented using combination of number of sine and cosine wavesforms (harmonics).Similerly any image can be termed as a function of sinusoidal signals.I want to see individual pattern for the...

I am beginer in image processing. Any signal whether it is 1D,2D or any multidimensional signal can be represented using combination of number of sine and cosine waves.Similerly any image can be termed as a sinusoidal function. Fourier series and transform plays vital role in image processing...

Hello everyone,I want to ask very basic question related to multidimentional signals like an image or a video signal. Physically what is phase of an Image? Also what is its physical significance of phase compared to magnitude of an image?

one from last weekend, first clear weekend nite in 2 months Omega Centauri is the brightest globular cluster in the sky. Its an easy naked eye visible object from a reasonably dark site Canon 5D3, 30sec exp, 100-400mm @ 400mm f5.6, ISO2000 cheers Dave

Centaurus A, taken through a 27.5 inch telescope rented through iTelescope.net. Exposure time: Luminance - 8x900s (120 min) RGB - 2x900s (30 min) each color. There's some noise I didn't get out of this image prior to color processing, but for some reason I'm having trouble getting a good color...

Hello everyone, I just started learning Matlab and I am trying to figure out how to image analyze an STM file. Where do I begin? Thank you, Michelle

Homework Statement Homework EquationsThe Attempt at a Solution The superimposed diagram shows that the probability of a noncommunicable disease in a underdeveloped country is 0.37. But it's not correct… I tried 0.56*0.78 = 0.44 as the probability of a noncommunicable disease in a...

An electron microscope image of GaN seen in projection shows white dots which correspond to columns of gallium atoms observed in projection. The dots show a hexagonal pattern but there is not a dot in the centre of each hexagonal. No nitrogen atoms are seen in the image. Which plane of this...