Questions on the image processing capabilities implemented in Mathematica.

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1
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0answers
21 views

ImageCapture on Windows 8.1

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 ...
4
votes
1answer
65 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
107 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 ...
4
votes
2answers
370 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?
6
votes
2answers
108 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
149 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 ...
-2
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0answers
47 views

Converting octave matrix function in Mathematica

I'm trying to solve a problem: I need to translate an octave code in mathematica but I'm struggling with those lines. ...
6
votes
3answers
246 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 ...
6
votes
1answer
417 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 ...
2
votes
2answers
147 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 ...
6
votes
2answers
184 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
276 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 ...
3
votes
0answers
56 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
151 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: ...
1
vote
1answer
65 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 ...
10
votes
1answer
430 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: ...
2
votes
0answers
62 views

Tracking, recognise the same players in two 'moving' pictures [closed]

This question is about tracking individual players. I made a series of high resolution pictures of a soccergame. The time-lapse between each picture is exactly 1 second. For each soccer player I can ...
18
votes
2answers
356 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
115 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 ...
0
votes
0answers
51 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
64 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
101 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
96 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?
2
votes
0answers
102 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 ...
29
votes
2answers
747 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
295 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 ...
3
votes
2answers
115 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
66 views

Correctly set up FindMinimum

I am trying to setup the following minimization to align two astronomical images. ...
1
vote
1answer
101 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? ...
5
votes
3answers
190 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 ...
16
votes
1answer
251 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
185 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 ...
2
votes
4answers
137 views

Creating an image from data not in grayscale

I can Import data from excel and create a gray-scale image using Image[data, "Real"] But I want to change from grayscale and as an example use red as the color
8
votes
2answers
515 views

detecting the radius of an incomplete circle

I need your help to detect the radius of the blue circle in images like this: . Reading these questions: 1, 2, 3, I figured that this code taken from @halirutan answer to question n°3 could help: ...
1
vote
1answer
96 views

Image partition according to contours

I want to extract contours from following image or I am wondering how to partition following image: line image looks like: This question is linked: How to superimpose contour lines on ...
3
votes
2answers
164 views

How to superimpose contour lines on transformed image

My goal is to superimpose contours lines or contour plots on distance transformed image.
0
votes
1answer
122 views

Image processing, masking

My question is about finding a object in a specific part of a image. For example, I use this image: As you can see, you will se two persons walking on the field. I only want to find the second ...
2
votes
1answer
131 views

Importing a Canon Raw file (.CR2)

This is a very top level question with no code examples attached. I have an interest in using Mathematica to read raw files coming from a Canon camera, before they are converted into jpg's, where ...
2
votes
1answer
322 views

Rolling Ball Image Background Subtraction [closed]

I am currently doing particle detection on some images and I wanted to do an Image Background Subtraction similar to what is available on ImageJ so as to even out the background tone. ImageJ uses a ...
6
votes
2answers
150 views

Analysis of many similar x-ray Images

From a 3d x-ray scan, I have many similar slices to analyze. Is there a way to determine the position of the three rectangles and the inner circle?
4
votes
1answer
280 views

Circle detection using invariance kernels

I'm not sure, if this belongs more to the signal processing forum or if I can post it in here, but I want to solve it via mathematica and it's some kind of image-processing I guess. I have a noisy ...
4
votes
1answer
197 views

Sample code for generating mosaic images doesn't work

I'm reading the blog on mosaics by Theodore Gray. I tried the first example: ...
15
votes
2answers
524 views

Extracting angles from a simple picture

I'm not sure if this is even possible with Mathematica, but I want to extract the angles between all lines in this picture: It consists of $12$ lines, so I want a matrix with $144$ entries. I ...
9
votes
1answer
180 views

How to efficiently mask an image?

I want to extract/cut out a part of an image. Since my mask is not rectangular I want to set pixels that are not masked to zero (black). My current approach is something like this: ...
3
votes
2answers
221 views

Recognize simple shapes in an image and color them randomly?

I have an image of polygons built from a polar function (see below). I'd like to color each triangle or quadrilateral a random color. Firstly, I'm not sure how to separate the simple shapes. ...
5
votes
2answers
242 views

Labelling objects in a picture with numbers

I need help processing a biology bacteria picture. I just started learning Mathematica and I hope you guys can use a simple method to help me solve the problem, please do not use super complicated ...
2
votes
2answers
156 views

ImageDifference. Is there an ImageSame, or how would one do that?

Is there an inverse to ImageDifference? What in two images are the same?
10
votes
2answers
207 views

Extract table from image

I have the image of a matrix (download it to see it bigger): Is there a way to convert this into a Mathematica numerical matrix, using Mathematica?
1
vote
1answer
153 views

How to make a big image/dashboard containing various data-graph

I want to make and image/dashborad (to export to PDF) with many VERTICAL bullet graphs gauges. And I can´t making it, in a automatic way. In general, the question is QUESTION 1.- how to make any ...
0
votes
0answers
28 views

How to get shadow of a 3d object [duplicate]

Suppose that we have a box or a sphere or an other 3D object and a ponctual light source. How we can generate the cast shadow using mathematic? Is there any tools to render a shadow given the light ...