Questions on the image processing capabilities implemented in Mathematica.

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1
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1answer
75 views

Mathematica 8 remove black background from image

How do I do that in Mathemtaica 8? I have found on this site many options like RemoveBackground[], but they don't work in Math.8. Are there any options? Here is ...
4
votes
2answers
348 views

Colorize Grayscale Image

I have a grayscale image that contains two objects. The grayscale pixel values can be divided into three intervals where two of them represent objects and the third represents the background. The ...
1
vote
1answer
39 views

Nothing happens when I click the mouse clicked on my graphics

I wrote codes to record list of coordinates when mouse clicked. It is expected that the coordinates should be plotted dynamically. But actually nothing happened. Can anybody help me to find the ...
2
votes
1answer
66 views

Image background subtraction using parallel computing

I am developing a program for pattern recognition. I want to use the parallel computing to get a real time application. I have two cameras where each one gives n frames/second. I need to process the ...
29
votes
4answers
652 views

How to make a stereogram in Mathematica?

Given a background and a pattern jpg files, is there a quick and easy way to produce a stereogram by using Mathematica? The following picture was produced from Photoshop, spent about half an hour. ...
47
votes
3answers
20k views

How to create a new “person curve”?

Wolfram|Alpha has a whole collection¹ of parametric curves that create images of famous people. To see them, enter WolframAlpha["person curve"] into a Mathematica ...
19
votes
4answers
2k views

How to create effect like Van Gogh's stroke brush?

I need to apply Van Gogh's stroke brush effect to a random image Take the following image as an example: Thank you so much if you could help!
32
votes
5answers
4k views

How to ask Mathematica to imitate Andy Warhol's pop-art painting?

I tried to ask Mathematica to imitate Andy Warhol, let it convert a Marilyn Monroe's portrait looks like Warhol's world famous pop-art painting. However, the result shown below is far from ...
0
votes
0answers
34 views

Understanding the use of GradientOrientationFilter to achieve a “brushed” effect

I'm trying to recreate in javascript a piece of code that appeared here on Mathematica, specifically in this answer: http://mathematica.stackexchange.com/a/39049/21482 The user Simon Woods suggested ...
3
votes
1answer
55 views

Recognizing Matching Colors in a Game Grid from a Camera Image

I am relatively new to Mathematica, having taken my first serious dive into it this week. As a fun project to teach myself some of the basics, I've come up with a goal of optimally solving a game ...
0
votes
1answer
58 views

Why is my Fourier transformed matrix rotated?

After Fourier transforming and shifting the zero frequency of a matrix, my outcome is rotated by 45 degrees from what it should be. Can anybody spot why? ...
0
votes
0answers
34 views

How to plot morphological stripe near the mouse-clicked position in an image? [duplicate]

I tried to use EdgeDetect and MorphologicalComponents to get the image edge elements. When I clicked on an image, I want the edge element nearby to be highlighted or plotted. Here is my code. Two ...
2
votes
1answer
126 views

How to highlight image edge with spline/bezier when mouse moved over?

It is known that EdgeDetect can find image edges in an image. Suppose the image edges consists of sets of lines. Can the detected edge line near the mouse pointer be highlighted as spline/bezier when ...
1
vote
1answer
255 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: ...
3
votes
1answer
53 views

How to create a 1D vector by selecting a straight line in a given angle of 2D array

Suppose I have an image created by the code provided below. I want to select a line (1D vector) $ \left(y-y_{0}\right)=n\left(x-x_{0}\right) $ from the output image (2D matrix) by specifying $n$ and ...
1
vote
1answer
62 views

Manipulate filters in arrayplot with graphical user interface

I have a set of images which need to be filtered by different filters. So I have made an interface in which the user can choose his or her filter. However I now want to manipulate the degree of the ...
11
votes
4answers
176 views

Segmentation of a microscopy image with uneven illumination

I am trying to do a little image segmentation on some cells taken from microscopy images that have uneven illumination. I am having trouble getting the background of the image cleaned up after ...
32
votes
3answers
2k views

Identifying critical points/lines 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 ...
5
votes
2answers
132 views

Converting image data to array

I'd like to convert these images to a list or array in order to graph them. I know some rows are unreadable, but it doesn't really matter. So I tried using ...
2
votes
0answers
88 views

Reading grave stone letters in an image

(Click on image to enlarge) (Click on image to enlarge) Is there an image processing technique that would aid in reading the letters and numbers on a grave headstone? Most stones are etched ...
0
votes
0answers
58 views

stacking images

I would like to take a series of night sky photographic images taken sequentially and enhance dim stars in a single image. This is a standard function in astronomical image processing packages, but I ...
0
votes
1answer
107 views

Order contour points in clockwise

I want to describe shape of an object using contour points descriptor. Given a silhouette (image black white of an object), I extrait the contour points using EdgeDetect[] fonction. After that, I need ...
5
votes
1answer
244 views

Areas of Voronoi cells from image file

I have an binary image with non-point objects. Does anyone have any suggestions how to determine area of each Voronoi cell in Voronoi diagram (goal is area distribution)? Thank you in advance.
3
votes
0answers
118 views

FindPeaks with noisy data

I am trying to understand the FindPeaks function in V10. I have two questions. Here is some measured data with noise. ...
33
votes
3answers
962 views

Composition à la Mondrian

I would like to paint something like this or,even better, like this I have tried ...
0
votes
0answers
27 views

Can any function give a draggable closed curve on feature edge of an image like “EdgeDetect” found?

I've posted the question, but hardly describe it clearly, now let me show it this way: I don't know the algorithm for "EdgeDetect". Suppose the detected image edge consists of single line pixels at ...
4
votes
2answers
163 views

How to highlight the feature edge of an image with draggable select lasso?

As shown in the picture, i want to know if it is possible to: 1) recognize the feature edge like face,nose,eyes,mouse,etc. 2) highlight the feature edge with draggable select lasso, 3) return the ...
12
votes
2answers
343 views

Improve TextRecognize on numbers

I have an image contain only numbers, and TextRecognize fail to recognize some numbers: img=; TextRecognize[img] (*826718*) The documentation says that "The ...
8
votes
3answers
1k views

Creating a foggy image

I want to create foggy images like this one (produced with Adobe Photoshop): Not at least familiar with Mathematica's Image processing capabilities, the only ...
20
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 ...
1
vote
1answer
47 views

Bug in ClusteringComponents yielding different results on practically same input?

I am using the image below. I want to run a simple ClusteringComponents, using the KMeans method and ...
6
votes
2answers
713 views

Exporting images as .avi

Here's a list of images: images = Table[ExampleData[i], {i, ExampleData["TestImage"]}]; And according to the reference "Export exports a list of graphics, ...
14
votes
1answer
102 views

How can I restore the old `ImageCompose` behaviour?

Prior to version 10, if ImageCompose was used to overlay a partially transparent image region over a completely transparent image region, the result would keep the ...
1
vote
0answers
58 views

How to generate a 3D terrain from a terrain-map image? [closed]

I attempted to generate a 3D terrain from a terrain-map image with the following code. What I got was a NULL terrain. What is wrong with my code? ...
14
votes
1answer
700 views

Is there a better way to “grow” black tulips?

I used the following clumsy way to obtain a bundle of black tulips. Is there a better way to do so? ...
6
votes
2answers
169 views

How to use Mathematica to turn a picture into low poly style?

I want to use Mathematica to turn a picture into low poly style. That is, to make the following conversion: Bill to Bill low poly(Using Image Triangulator App). I think the biggest difficulty is how ...
1
vote
2answers
147 views

Why ColorReplace does not follow the rules specified?

I tried to use ColorReplace to change the colors obtained from MorphologicalComponents. However some of the changes didn't ...
10
votes
1answer
208 views

How to do color-fill in Mathematica?

Color fill, the ability to apply a desired color to an enclosed area, is one of the basic functions provided by most graphic applications. Is there a similar ...
8
votes
6answers
955 views

How to blend two photos in Mathematica?

The following two photographs forest and tiger were blended into one with screen blending mode in Photoshop. How to accomplish the same result in Mathematica? ...
3
votes
1answer
90 views

How to track objects in video

I have a video that contains object moving in one direction, is it possible to track the objects and get information like object moving speed, object length and coordinates etc.? An example would be I ...
2
votes
1answer
74 views

Image padding problem with transparent

I have an image that I'm trying to pad some transparent border. But I get error: "The specified padding value is not compatible with a 3-channel image." ...
6
votes
2answers
423 views

How to make a cleaner copy out of a blurry text image before OCR?

A cleaner copy can be obtained from a blurry original by using the level adjustment in Photoshop before going for a better OCR. The picture below shows an example. ...
6
votes
1answer
74 views

Image compose coordinate problem

Am I missing something or this is a bug? Why I get different results by just adding a bracket? ...
2
votes
2answers
110 views

Compose one image over another

I'm a newbie in image processing using Mathematica. I'd like to compose an image $A$ over an image $B$ into an image C such that $\quad C[i,j] = B[i,j]$, if $A[i,j]$ is white $\quad C[i,j] = ...
15
votes
1answer
270 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 ...
4
votes
1answer
96 views

What should I do if the geographical map provided by Mathematica doesn't show some rivulets?

I have a list of geographical coordinates(maybe the coordinates are not that accurate, but the problem is not that vital): ...
10
votes
0answers
98 views

Segmentation of sunspots

I recently went for a walk with my camera and snapped a few pictures of the sun. The pictures didn't turn out too well, but this was to be expected without a telescope. I thought it might be a nice ...
8
votes
1answer
161 views

ImageTransformation: polar to cartesian

I am working on something that requires the polar transformation of some images. I implemented this transformation with ImageTransformation: ...
2
votes
3answers
149 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
363 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 ...