Feeds
提问
finding unfiltered backprojection and laminogram
I have to generate a sinogram of a phantom image and use back projection to plot my laminogram. I cannot use Radon or iRadon mat...
13 years 前 | 1 个回答 | 0
1
个回答提问
investigating changing image contrast with differnt modulations
What should I comment on change in contrast with changing A and B? Let s(x,y) = A + B sin[2π(u0x + v0y)] be a 2D sinusoidal ...
13 years 前 | 1 个回答 | 0
1
个回答提问
2d DFT using 1D DFT twice
How can I do 2D DFT by doing the fourier transform in the X direction first and then the Y direction. Basically what fft2 does b...
13 years 前 | 1 个回答 | 0
1
个回答提问
Spatial resolution and spatial frequency resolution
In a 1D fourier transform, fs is sampling frequency and the time resolution T=1/fs. so for a function f(t)=sin(20*Pi*t), the f...
13 years 前 | 0 个回答 | 0
0
个回答提问
Two dimensional fourier transform
How to determine and display the two dimensional fourier transform of a thin, rectangular object? The object should be 2 by 10 p...
13 years 前 | 2 个回答 | 0
2
个回答提问
Bilinear interpolation error - index exceeds matrix dimensions
I am supposed to do the bilinear interpolation without using imresize or interp. I am getting the error 'Index exceeds matrix di...
13 years 前 | 1 个回答 | 0
1
个回答提问
interpolation done without imresize
How to do nearest neighbor interpolation and bilinear interpolation on a gray scale image without using imresize? The code is su...
13 years 前 | 2 个回答 | 0
2
个回答提问
Is it possible to reduce the spatial resolution of an image without using imresize?
I have an image 3692x2812 pixels and 1250 dpi. I have to successively simulate reducing the spatial resolution by a factor of 2,...
13 years 前 | 1 个回答 | 0
1
个回答提问
How can I tile an image?
Tiling an image: The image is broken up into a grid of 4 sub-images. Each of the 4 sub-images is a scaled down version of the en...
13 years 前 | 1 个回答 | 0
