# Tagged Questions

Questions on the image processing capabilities implemented in Mathematica.

503 views

### How to create a 3D model based on MRI cross-sections?

Recently, I stumbled upon the following surreal MRI-scan of broccoli: and ever since the moment that I saw this I've been wondering whether it is possible to recreate the broccoli based on ...
215 views

### How to convert the binarize-picture to a Region

The Region of Mathematica is nice,and is the new conception of version 10.0.I can convenient get ...
1k views

### How to automatically remove text from images?

I'd like to remove the text in the center of images automatically. To use Inpaint[], you need a mask, but I don't have one. So really the problem is: How to build ...
89 views

### Fill a Circle in an Image

Let's suppose I have something like this (the image resulting from this): ColorNegate[Rasterize[Graphics[Circle[{100, 100}, 50]]]] Now, what I want to do is fill ...
291 views

### Can I get the curvature at any point of a random curve?

Random curve like the above, for example. The data source is an image file. I don't have an expression. I want to start by curve fitting and then compute curvature. Is it possible?
642 views

### Can I OCR Mathematica code on an image?

There's no doubt that one should always post the Mathematica code text rather than its screenshot when asking questions in this site, but every time I saw someone posting a screenshot, I can't help ...
231 views

### Challenge: deblurring images [duplicate]

My friend came back from holidays, where he took lots of pictures. Unfortunately, the camera was set on manual focus and most pictures are blurry. It got me thinking that mathematica showed how to ...
126 views

### How to count the grid in the picture

I want to count how many grids in colunm and row,I know the answer is 38*11,But how can I use mma to count it?It confusion me ...
167 views

### Detect buildings in cadastral map as polygons

I have this topological cadastral map, and others: It can be imported into Mathematica using img = Import["http://i.stack.imgur.com/3udXJ.jpg"] I want to ...
86 views

### How to ImageIdentify multiple objects in a single image?

Suppose an image has multiple objects: ImageIdentify only finds the banana: ...
88 views

### Optimization of a voxel projection function

I implemented a function to check if a voxel (3D pixel) is well projected on the space of a image (black and white silhouette) through a perspective camera. The function does the work but It need more ...
106 views

### HighlightImage speed?

I am doing a study into image processing and motion detection. I am using various filters (ImageDifference, HighpassFilter, ...
539 views

### Angle between two areas of an image of a 2D FFT

I'm trying to obtain the angle between the red line and the area surrounded by the red circle, related to the middle of the image. Usually the area surrounded by the red circle is lighter than the ...
119 views

### Log transformation (in dimensions) of an image

Is there an easy way to do a log-transformation of an image? I'm not taking about the colours, but the geometry. The difficulty is to extrapolate pixels and round-offs. For example, an white image ...
100 views

### Rotate imported images which are inset into a Graphics container and then overlapped?

The methods given as answers to this question do not seem to work here. I suspect it is because of my use of Inset function. Consider two .png images hand1 and ...
201 views

### Image Processing: Car front detection

Background Image processing can be applied to car license plate detection problems see Wikipedia, segmenting numbers, belisarius's old answer. Also, on this site once can use some techniques ...
128 views

### Strategy to build efficiently an image using parts of many images

I have about 1000 images of 1000px $\times$ 1000px and a list which contains the coordinates of the pixels to select, for each of the 1000 images. Each pixel is used once, so the final image is a full ...
295 views

### How can this resampling code be made faster?

Suppose I have a matrix: sbt = RandomInteger[{0, 2^16 - 1}, {5202, 3465}]; It represents an image and I would like to do "pixel binning" on it, where I take ...
226 views

### Adjacency matrix from image file of plane map

I have image files (PNG format) of plane maps of regions delimited by black borders I would like Mathematica to compute the associated adjacency matrix for the contiguous regions in these maps. ...
42 views

### How to avoid “Quit[]” to execute notebook multiple times [duplicate]

I am using a program to binarize several images and then adding all the images together using "ImageAdd" to get one image. This image is required for further analysis of the images. The program ...
85 views

### Remove color artifacts in overlay of several Graphics objects?

I am trying to create an animation with a graphic of an arm that can bend at the elbow. For this purpose I created the following two images: hand1 and hand2. I load the images with ...
83 views

A recent thread raised several concerns regarding the Documentation page for ImageAdjust. The first issue is related to the first statement under the ...
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### Detecting discontinuities in derivatives in images [closed]

Considering an grey-scale image as a function $z=f(x,y)$. (Specifically, I'm interested in $f=h*h*...*h$, where $h$ is the indicator function of a regular hexagon.) I am interested in finding places ...
651 views

### How to detect loops in a vector field?

Given a vector field and I'd like to detect if there are streamlines in closed patterns. For example, if the input is a vector field like this: ...
359 views

### Coloured image transformation in pointillism

I would like to transform an image (a photo for example) into a set of single colour circles with fixed but adjustable diameter (bigger than the pixel size), into a kind of pointillism. The number of ...
143 views

### Which values did ImageAdjust choose?

I have a picture obtained from a camera in an experiment. It's a .dat file, contains only numbers. I can re-create the image by importing it as data and using the ...
168 views

### Coloring image components according to their area

I have a rasterized image img that is created by this code: ...
62 views

### Create set of data from vector curve [closed]

I need exactly what is written in the title. Suppose we have some curve plotted: p = Plot[Sin[x],{x,0,2pi}] now we save that as vector graphics: ...
191 views

### Image analysis: Gravel Sieve

In this link: http://broadwaysand.com/?page_id=165, you can find different gravel pictures. A quarter dollar coin gives the scale, because its diameter is 0.955 inches (24.26 mm) I want to get the ...
261 views

### How to calculate the mean of images?

In practice, subtracting the mean image from a dataset significantly improves classification accuracies. I thought there would be a ImageMean[] function but can't ...
1k views

### Scraping High-Res images from the MoMA and the Van Gogh Museum websites

Many art websites allow the user to zoom into an image to see it at high resolution by using image tiles. It is great on the website, but presents problems if one wishes to compile a complete high ...
77 views

### How to do text recognition in a language that doesn't use the roman alphabet [closed]

I am trying to reconize a single letter or character from a non-roman character set by edge detection. I want to extract single characters from a text image. When I identify that letter or character I ...
243 views

### How can I capture a rectangular area from an image?

I am looking for a method to extract rectangular areas from an image. The image is divided up into rectangular problem spaces like the image shown below. Each numbered problem is given with some text ...
220 views

### How to transform an image into a probability density function?

I'd like to use the Metropolis algorithm to randomly generate points with density according to the brightness of an image. I just need to transform a binary image into a pdf function to use this ...
213 views

### Smoothen the curve found by EdgeDetect

It seems that curves found by EdgeDetect always persist $C^{0}$ continuity only. Consider the following example: ...
230 views

### Calculate dual graph of planar Graphics map

This diagram from a Wikipedia article illustrates what I hope to accomplish in Mathematica: I have a planar map in Graphics format. Here are two very simple ...
92 views

### ColorReplace does not work

I want to do - seemingly - simply image processing. I want to replace all blue pixels with white pixels. The obvious command would be: ...
254 views

### How to make a Nebulabrot?

A Nebulabrot is a generalization of the Buddhabrot, a fractal rendering technique related to the Mandelbrot set that sort of looks like a meditating buddha. The Buddhabrot rendering technique was ...
80 views

### How to segment letters and text blobs?

This new article from Google research describes how their Translate app preprocesses an image on a phone before applying convnets: It needs to weed out background objects like trees or cars, and ...
105 views

### Tracking features where ImageFeatureTrack finds none?

How is it possible to track common features in the following sequence of images (e.g. holes or corner points along the top margin), ? I have had no luck with ...
198 views

### How to increase the thickness of the edge in a random image

This is a Voronoi Diagram. I really want to know how to change the thickness of the "wall" of each V-cell, in another words, the thickness of the edge in this diagram.
54 views

### How to select components selected via SelectComponents?

I have selected the components of a "reduced" (dilated, thinned) image, now I need to go back to the original image and find the coordinates of the components I have found. My code currently does ...
102 views

### How to create a MorphologicalGraph from MorphologicalBranchPoints

I want to select the morphological branch points of a thinned image to create a MorphologicalGraph like the one obtained by Pruning. I want to avoid the pruning step. How can I delete from the ...
24 views

### marking spontaneous in an Image and collect coordinates [duplicate]

How to mark spontaneous in an image and collect all the positions of marking. also then any example will be great aon land mark based registration Thanks
237 views

### Mathematica ignores image orientation

I have a bunch of mixed images, some portrait orientation, some landscape, which I want to be processed by Mathematica. When I Import them Mathematica handles them ...
278 views

### Extract bathymetry data from a map

Thanks everybody for edit and recommend. Here is a clearer version of my question. I have a map that shows bathymetry of a lake with legend showing depth relative to a range of color. The map ...
149 views

### Alternatives to Mathematica that are not computer algebra systems [closed]

Are there alternatives to Mathematica that are not computer algebra systems? I know there have been questions on this, but I am focusing on oprn source projects and instead of focusing on computer ...
1k views

### How do I remove grid from this photo?

I found this cat a month ago, and I'm not his owners' friend so the mosquito grid was the inevitable problem. I would like to post-process this photo to get rid of it, but I don't know exactly how ...