Questions on the image processing capabilities implemented in Mathematica.
19
votes
0answers
882 views
Measuring fractal dimension of natural objects from digital images
This is a useful topic. A college physics lab, medical diagnostics, urban growth, etc. - there is a lot of applications. On this site by Paul Bourke about Google Earth fractals we can get a high ...
17
votes
0answers
617 views
Identifying critical points of 2/3D image/cubes
Upshot
I am interested in identifying critical points of a 3D field/cubes (maxima, minima, tube-like and wall-like saddle points) and 2D field/image (maxima, minima, saddle points). I.e. the ...
12
votes
0answers
293 views
FindFaces: how to improve the results of the face recognition feature
In Mathematica 9, the FindFaces command offers an easy way to detect faces. In some experiments, I've been getting reasonable results, but I'd like to know if there ...
7
votes
0answers
141 views
Proving (self) similarity with Mathematica - Reccurrence Plots, Similarity Plots etc
I posted this question in math.se but given the sheer tumultous number of questions that keep appearing on math.se and also given that I am trying to accomplish this in Mathematica, I thought I'd post ...
6
votes
0answers
177 views
Cluster a signal into areas of equal intensity
Introduction
I have a greyscale photograph that I want to partition into areas of equal intensity.
This means, that the integral over each partition should be (roughly) equal.
There is no unique ...
2
votes
0answers
93 views
looking for a generalised Hough Transform function or a least a function to locate circles
I am looking for a generalised Hough Transform function or a least a function to locate circles (position of center and radius) in a image. There is the standard Hough line search function ...
1
vote
0answers
124 views
Weird resampling when I try to export an Image
Mathematica language newbie here. I wrote the following code to quantize an image:
...
1
vote
0answers
74 views
Why does animating images overlayed with graphics primitives take much longer than animating either individually?
So I start by making a list of images with
images = Image[ArrayPlot[Import[ (* filenames *) ]]]
Then I run some complicated code that extracts the coordinates ...
1
vote
0answers
244 views
non-linear trend reduction using thresholds
Doing some mappings of the earth magnetic field results in the left-hand figure below (which consists of 181 profiles):
To improve this I tried a non-linear trend reduction using, for example,
...
0
votes
0answers
104 views
Finding Peaks in an Image using Fourier — Problems with Derivatives
Rest of OP is below, but I am editing to add that the real problem seems to be in the way my functions are being defined. Sorry, but the one reply below is not clear enough to help here.
My function ...
0
votes
0answers
74 views
Binarize a byte-formatted image
I have an image that I've imported as type "Byte" (I need to work with pixel values in this format). Let's just say the image is
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