Questions on the image processing capabilities implemented in Mathematica.

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8
votes
1answer
133 views

ImageTransformation: polar to cartesian

I am working on something that requires the polar transformation of some images. I implemented this transformation with ImageTransformation: ...
0
votes
0answers
76 views

How to identify more than one truck on a picture [on hold]

First, I am completely new to the field of image processing and I don't know how to start. My problem is as follows: I am doing a data analysis to identify if there are multiple trucks on certain ...
2
votes
3answers
128 views

Alternatives to Append/AppendTo for generating a list in an interactive DynamicModule?

I have a stack of timelapse microscopy images that I am trying to segment frame-by-frame using some of Mathematica's image processing functions. I have created a little interactive DynamicModule with ...
18
votes
2answers
287 views

Object separation from a 2.5D surface

I'm trying to identify the shape and the boundaries of objects. The data was generated with a laser scanner and represent the surface of an area in which many boulders lay on the ground and making up ...
2
votes
0answers
88 views

Power::infy: error using FindFit

I have a 2D data to fit (the Airy type pattern from diffraction of Gaussian beam on the circular aperture). Please see the attached picture. I was going to use a function like ...
5
votes
2answers
286 views

Is it possible to produce “tilt-shift” effect in Mathematica?

I attempted to produce a kind of miniature faking look from a street scene photo. I tried to shift the perspective lines close to parallel to each other to obtain such effect. However, the result ...
0
votes
0answers
46 views

Need mathematica to convert images to pure black and white [closed]

So I have a bunch of images (319) that look like this: http://i.imgur.com/a3u8QJi.png I need a script to convert them to pure white and pure black. The only part I need to preserve is very black ...
0
votes
1answer
59 views

Unusual Slow Down with LocatorPane/DynamicModule

I have coded up a little interactive DynamicModule to help me with image processing/segmentation of stacks of timelapse microscopy images. I am experiencing a crippling slow down in the ...
4
votes
1answer
80 views

How to translate and scale an image via ImageTransformation

Is there a way to translate and scale a 2D image simply by using ImageTransformation[] and TransformationFunction[]? I know how ...
13
votes
2answers
190 views

Combining images with CUDA

2nd Edition: To make it a bit more clear, and to summarize the discussion in comments. I have a small image, like this one: ...
5
votes
1answer
124 views

Tolerance on image detection

I am trying to pick straight lines out of a photographic image to track deflections of a structure under loading. The idea is to mark certain structural elements with straight lines, as they deflect ...
2
votes
2answers
69 views

Image Processing: Using AdjacentBorders with SelectComponents

I've been doing some image processing and have been having trouble with the AdjacentBorder command. I've got an image in which I have several elements that are on ...
1
vote
0answers
126 views

Speeding Up Image Processing Functions

I am working with stacks of 1024x1024 timelapse microscopy images that I am performing a series of image processing functions on to help segment each image. These functions include ...
12
votes
1answer
226 views

Speed up adding Poisson noise to an image

I'm simulating some images corrupted with Poisson noise, but I'm encountering a few problems with performance. According to the documentation on ImageEffect, one ...
13
votes
1answer
340 views

Automatically lining up two images that have some common elements

Over on genealogy.SE, I proposed a method of manipulating images to make "bleed through" less visible and the handwriting on the correct side of the page more legible. Here are the original images: ...
2
votes
1answer
76 views

Black line after ImageTrim

as shown in Image correlation I would like to detect the shift between a stack of images. Here are the images: and here the code: ...
16
votes
7answers
1k views

Is there a way to recreate the typical Red/Blue-Postereffect using Mathematica?

I think nearly all of us have at least once seen an image like this: So I wondered whether it is possible to recreate this effect using Mathematica because it seems like it wouldn't need that many ...
4
votes
2answers
107 views

Layers of Locators of Different Colors?

I am a Mathematica novice trying to do some interactive segmentation of microscopy images. I've been trying to understand and build upon some code from a previous StackExchange discussion (Can ...
2
votes
3answers
106 views

Speeding Up Replacing of Labels in Large Matrix?

I am Mathematica novice and am trying to find a fast way to replace labels in some rather large matrices (512x512 or 1024x1024) that have resulted from segmenting images with WatershedComponents or ...
7
votes
1answer
227 views

How can I extract the outline of bubbles in my image?

I have an image: I tried to extract the outline of the bubbles, but I met with some problems. Firstly I tried the method used in Mathematica documentation for ...
5
votes
3answers
386 views

Detect each polygons in an image

Considering this image: Is there a way to colorize each tiles independently? My problem is that img = Import["http://i.imgur.com/Y87duSz.jpg"]; Colorize@img ...
3
votes
1answer
268 views

Image Processing: Detecting and counting small objects

I would like to analyze close-up images of human hair. My goal is to detect and count the number of hair strands and determine their width, but I am having a hard time binarizing the image. Seems like ...
1
vote
1answer
80 views

Identifying the color in Image

This has mad me Crazy for a while Can any one please Help me solving this this is the Image that I am working on . Basically this image is made up of 98 different color patches 7 patch on each level ...
5
votes
2answers
140 views

How to color separate a colored-in-pencil drawing?

I'd like to pick out just the "pencil" color in some drawings done by a young member of the household (he'd like to print out copies of these pictures and distribute them to his class mates on the ...
4
votes
1answer
194 views

How to get better quality EPS graphics

Yesterday, I was doing any Tables of 15 graphs similar to the next example, to save .eps and use in latex. In the generation of the graphs Mathematica spends many time. Is possible to reduce this ...
1
vote
1answer
91 views

Moment central of a binary image

I am implementing the Hu set of invariant moments detailed here Hu set of invariant moments. I implemented the moment Image like this: ...
2
votes
1answer
175 views

Segment parts of a picture

I remember that there was some thread of this sort, but I could not find it, so I hope it's ok to open a new thread. I want to segment pictures of the brain, i.e. I only want the area within the ...
0
votes
0answers
52 views

GraphicsGrid command

When we merge some colorful plots to a single image, with the command GraphicsGrid, the quality of output image will be lost, slightly. That is, for instance all ...
5
votes
2answers
148 views

Exporting pictures in their correct size when using Grid [duplicate]

I have a large number of pictures, and I need to place each three of them in a grid with a certain layout. For example, if I have the following pictures: ...
4
votes
2answers
252 views

How to create breathing wall effect?

I would like to recreate the effect of the one in this video: Breathing walls This is my first time manipulating images, and because of that, I don't even have a clue where to start. But I think ...
1
vote
1answer
131 views

Intersecting/Overlapping Image Elements Counts?

I have what I believe should be a relatively easy problem to solve that I have not been able to find an elegant solution for. I need to compare two binary 2D images and count if any of the elements ...
3
votes
1answer
257 views

Overlay two images

I have a series of endoscopic images taken by two cameras at the same time. A color image: and a fluorescent image indicating cancerous cells I now want to overlay the two images to indicate ...
7
votes
1answer
437 views

Binarize turning image completely black?

Running Binarize (or EdgeDetect) on a filled black and white image is resulting in an all black image. The image has the following color distribution (with most images points falling in either a ...
3
votes
1answer
246 views

Remove borders in a series of images

I have a series of mouse MRI images, here are two How can I automatically remove the metal cage around the mouse to make it look like this: The position of the cage is not always in exactly ...
1
vote
2answers
232 views

Projection of curve 3D (x,y,z) on the x-y plane

I have a following systeme : \begin{equation} \left\{ \begin{array}{rcr} (\beta+\frac{1}{2}\delta^{2})\nu_{1}(u)-\delta\nu_{2}(u)+\nu_{3}(u)& = &0\\ ...
0
votes
0answers
46 views

Change size of a saved plot or image (post-processing)

I have many plots (that take a long time to run) and each is saved to a variable name. For simplicity, say one was: ...
3
votes
2answers
153 views

How to count the number of n-gons and line intersections in an image of a complete graph?

I would like to count the number of line intersections and number of n-gons in a complete graph (which forms a regular polygon). The only way I've come up with that would allow me to do both in ...
4
votes
0answers
109 views

Multi-Camera streaming using Mathematica

I am attempting to capture dynamic streams from multiple usb webcams using only mathematica. Using ImageCapture["Device" -> $ImagingDevices[[x]], I've tried to ...
10
votes
2answers
1k views

How should I reproduce this colorful swirling gif?

Surfing on the web, I came upon this cool gif: Does any one know how to reproduce this in Mathematica? I have some ideas myself, so I will try to answer this question as well.
3
votes
1answer
111 views

Strange ImageFilter results

I am trying to perform some neighborhood analysis on an image, but ImageFilter seems to be interfering with the results outputted by the provided filtering function. Initialization Given the hue ...
3
votes
0answers
115 views

How to measure the speed of ball from a video or a set of pictures? [closed]

Suppose a camera and the need to measure the speed of a ball such as a tennis ball. Usually, the speed of ball is measured with Doppler effect where the pulse difference reveals the speed. Now I want ...
1
vote
1answer
180 views

Data filtering using Butterworth filter

I want to filter data using Butterworth filter. I am currently using Matlab and I want to know how to do it in Mathematica. I have the following data: ...
1
vote
0answers
62 views

ImageCapture on Windows 8.1 [closed]

I have an Asus SmartTab tablet with Mathematica 9 on it. When I run ImageCapture, nothing shows up in the image window. Originally running this completely crashed ...
9
votes
2answers
249 views

Measuring curve length on a binarized image

With the help of almighty Mathematica 9, I got from this To this: with this code: ...
2
votes
3answers
143 views

Recover data points from RGBColor of known ColorScheme

In general I want to recover the z-values from an image of a DensityPlot. A simple example might just be ...
5
votes
2answers
443 views

I want to get a special curve in a picture

I have a picture,and I want to get a special curve in this picture ,than draw the line in a new picture.inbut I can't do this . Like this: The picture is this Anybody have an idea?
11
votes
2answers
198 views

Rotational Averaging of Image Periodograms (FFTS)

I'm writing a code to do rotational averages of image FFT's. I have a working version but it is pretty slow. Wondering if anyone has any thoughts on a way to do this more efficiently. Data looks ...
3
votes
1answer
205 views

Partitioning an image based on features

I have an image that has various characters hand drawn in it, like numbers and letters. I'm trying to partition each character into it's own image so I can run it through ...
7
votes
3answers
435 views

Line Intensity Profile From Image

I can get line profiles from images using imagej but it would be nice to be able to do this in my mathematica notebooks. I found this http://library.wolfram.com/examples/intensityprofiles/ after ...
7
votes
1answer
481 views

Anti-aliasing a fractal-like bitmap image

I have a .bmp image 9600x5400 that shows a lot of points at various intensities. There are no lines inside this picture - only a lot of points. I would like to apply anti-aliasing on the image to make ...