Questions on the image processing capabilities implemented in Mathematica.

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4
votes
1answer
464 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
103 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
229 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
276 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 ...
2
votes
1answer
172 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
225 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
75 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
1k 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
297 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
225 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
338 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 ...
8
votes
1answer
484 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
276 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
437 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
159 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: ...
4
votes
2answers
232 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
135 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
129 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 ...
2
votes
1answer
447 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
76 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
341 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
201 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
459 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
295 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 ...
4
votes
1answer
234 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 ...
8
votes
3answers
764 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
548 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 ...
3
votes
2answers
462 views

Image processing: extracting ordered contour

Continuing the question How to extract the edge from a set of points and its answer by Simon Woods, I would like to ask if there is a way to extract the boundary of obtained as ...
7
votes
2answers
364 views

Reconstructing an image from overlapping patches

The Mathematica function ImagePartition can create overlapping sub-images with the pixel offset options {dw, dh}: ...
6
votes
1answer
414 views

Image fading from one corner to the other

I'm preparing a presentation where I want to place a background image on each slide (for aesthetics). These are extremely color filled images (like photos; lets use "ExampleData/lena.tif" as ...
4
votes
0answers
139 views

Challenge: Speeding up MaxDetect for application in 3D blob detection

In image segmentation it is a common problem that objects appear clustered and are therefore undistinguishable from each other when using simple algorithms. Based on this post I obtained efficient ...
7
votes
3answers
252 views

Morphological Components with periodic boundary conditions

I would like to find the connected(with periodic boundary conditions) components in a large binary matrix. What I've tried, and it does a fair job is: ...
2
votes
1answer
134 views

Importation multiple dcm images [duplicate]

I'm extremely new to Mathematica. I want to import 201 .dcm (DICOM) files into Mathematica 9. Is there a way to do this which doesn't require my doing it an image at a time? My ultimate need to is to ...
13
votes
1answer
630 views

Image Processing: Edge detection of the tumor on tomogram. Сalculation area of the tumor

The task is to identify the image region of the tumor. I try to use example from documentation centre: ...
19
votes
2answers
625 views

How to make a curve selectable from a scaned image and convert it to a list of coordinates

I have a scanned image (binary-ized): Is there any way to reduce one of these curved lines (full or dotted) to a series of its coordinates (e.g., sampling interval of 0.01 on x-axis)? I've read ...
2
votes
1answer
229 views

How to use the function ImageCorrelate? [closed]

I am a beginner in using Mathematica, know little about optics. However, I would like to know how to understand the function ImageCorrelate, since the ...
1
vote
0answers
140 views

How can I add drop shadows to the text of non-input/output cells?

Inspired by simon woods's wonderful shadow function, I want to add drop shadows to all the text of non-input/output cells in a notebook, something like this: By using simon woods's shadow function, ...
0
votes
2answers
158 views

Import a large no. of image from a folder together to Mathematica and assign a variable to each of the image [duplicate]

I am using Mathematica for the processing of images. For this I have to process a lot of images. Currently, I import one by one of the images to run the simulation. I want to import all the image ...
1
vote
2answers
194 views

Cropping a Plot without rasterization

Suppose that I make a plot of $x^2$ vs. $x$: myPlot = Plot[x^2, {x, -1, 1}, Frame -> True] If I click on the plot, I see the orange handles with which I can ...
0
votes
1answer
211 views

How to apply a conformal map to a jpg (or other image)

I would like to apply a conformal map to a jpg. For example, the map $z\mapsto z^2$ to this image: http://thumbs3.ebaystatic.com/d/l225/m/mGyeriV7l-YArkeBd9oMUng.jpg Any help on how to do this?
3
votes
0answers
322 views

Masked Image Registration/Alignment/Correlation

I'm trying to register (align) two circular grayscale images using a boolean mask to prevent them simply being aligned on the fixed circular border. There are also small fixed circular regions in the ...
37
votes
2answers
1k views

How can I add drop shadows and specular highlights to 2D graphics?

I thought I'd share some code in the form of a self-answered question, but other answers are of course welcome. Drop shadows are a familiar visual effect, giving the impression of a graphical element ...
2
votes
4answers
582 views

How to calculate the position of a figure in an image?

My question is about recognising soccer players in the pitch. Thanks to Bill S who wrote an excellent script to recognise parts of the players. I found this issue after testing his solution. I will ...
6
votes
2answers
289 views

Band Intensity Quantification

I would like to measure the density of my western blot band by measuring the area under the peak from this plot. More specifically, my image will have several lanes with a pattern of bands in each ...
0
votes
0answers
112 views

Correctly set up FindMinimum

I am trying to setup the following minimization to align two astronomical images. ...
1
vote
1answer
199 views

Image basics in mathematica

1) How the pixel values are defined in mathematica or how it is different from matlab? 2) I am wondering how image properties are different in mathematica, and how they are calculated? ...
6
votes
3answers
800 views

Understanding Bilinear ImageResize

In trying to understand basic image transformations, I have attempted to code my own image resize function that uses bilinear interpolation. I checked my work against Mma's ...
18
votes
1answer
367 views

Object differentiation in image

After purchasing a box of alphabet pasta for the kids, I wondered if there was way to extract the frequency of appearance of letters in the box by taken a sample and the analyzing the picture. ...
5
votes
2answers
305 views

How to make binary image from black holes on white background

How to convert black holes on white background, so that I can see a binary image of holes on white image or bright dots on black image. I can create a mask then also I am stuck with bright dot on ...