Questions on the image processing capabilities implemented in Mathematica.

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9
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2answers
1k views

Pixel perfect world map with no border lines

I'm trying to build a real world map in Minecraft and want a pixel-perfect raster image I can copy pixel for block. How can I modify ...
10
votes
2answers
510 views

Reproducing the xkcd “Self-Description” comic

Trying to brush up on my programming, I wanted to see if I can reproduce at least the first two panels of the following comic in Mathematica: I have some code for trying to reproduce the first ...
6
votes
1answer
83 views

Inverting an ImageAdjust

ImageAdjust does an excellent job of auto-leveling an image. Although there doesn't appear to be an explicit way to get the contrast, brightness and gamma values ...
1
vote
0answers
36 views
11
votes
0answers
104 views

Handwriting recognition with Mathematica

I am trying to teach Mathematica to read my handwriting. Since I don't want to ruin my reputation by showing my own handwriting, I am going to use a font called blackjack. Lets say this is a ...
7
votes
1answer
150 views

Weird behaviour of HighlightImage—bug or not?

For background, check my answer under this question. It is clearly stated in the documentation of HighlightImage that the 2nd argument,...
1
vote
0answers
64 views

Detecting lines of handwritten text

Additionaly to question Identifying and removing features from scanned handwriten text, I'm looking for procedure suggestion that will identify only the lines of text like from But problem is that ...
3
votes
1answer
72 views

How to import Byte values of 8bit gray scale image

I have the following image (8bit, gray scale, 1600*1200 pixels): What confuses me: 1. Dimensions[Import[imageFileName, "Byte"]] gives ...
5
votes
0answers
69 views

Geographic text recognition [closed]

I would like to process an image from this Wikipedia page to get the structured data out Like so <| "New York" -> 28, ... |> Not sure where to start.
6
votes
1answer
121 views

How to calculate the point spread function used in function ImageDeconvolve [closed]

Question Background How can estimate the PSF function to deblur an image of plate licence of a car It was marked as duplicate. How to enhance a fuzzy image I don't very agree the current ...
10
votes
2answers
248 views

How to retouch (smart fill) photo image?

Can the program proposed by Alexei Boulbitch at the post of Custom arrow shaft be adapted to retouch an image in setting a mask arround the part one desires to disapear? This is only a suggestion, ...
1
vote
0answers
107 views

Data analysis from multi pictures

I have a folder of multi images and all of them are treated in the same way. Now I can only import them one by one and plot data one by one.But I want to import them once a time and plot the data in ...
2
votes
1answer
124 views

Is there Sauvola's or Niblack's threshold binarization algorithms?

It seems that there are no Sauvola's or Niblack's built-in algorithms for image binarization. Maybe someone has ready to use math-code that implement one of these algorithms. I need one of these ...
1
vote
0answers
26 views

Not sure about ComponentMeasurements MaxPerimeterDistance

I don't understand what actualy MaxPerimeterDistance in ComponentMeasurements measures. For example: 62x16 (white area) ...
5
votes
3answers
157 views

Counting marks on an image

I know Mathematica can do this but I could not come up with the correct search terms to locate a solution. I want to mark interesting spots (such as compromised cells) in an image by hand and use ...
0
votes
0answers
57 views

Time series of a point using ImageFeatureTrack

This question regards tracking, however it is more about writing efficiency in mathematica compared to other programming softwares. I get the tracking of a point between two movie frames by: ...
3
votes
0answers
74 views

Help changing coordinates back after partitioning an image?

I'm new to Mathematica. I was just wondering how I could change the coordinates back after I partitioned an image. For example, if I used ImagePartition[] to split ...
20
votes
1answer
3k views

How to create a fascinating QR code like this?

Check the facinating QRCode in my profile page here You can find that this QRCode is some sort of intriguing as the QRCode is a IMAGE ITSELF!!! So my question is, how to create such a QRCode ...
2
votes
1answer
71 views

Can ImageFeatureTrack be used to track the IntensityCentroid of objects

I would lik to track the IntensityCentroid of objects in sequentiell images by using ImageFeatureTrack. A set of 100 images (...
3
votes
2answers
332 views

Maximum brightness of two gray scale images

I am using the answer of bill s in Greater operator should give greater element. Here he showed the example: ...
4
votes
2answers
111 views

Visualization of tracks of objects in images by superposition

I have sets of images (each contains about 3000 images where many objects are seen, each image is 4 Megapixels large, format is 8bit, gray scale, png). To get an impression about the trajectories of ...
2
votes
0answers
89 views

Fan beam tomographic projections in Mathematica

I am embarking on a little project to redo some of my old MATLAB image processing code in Mathematica. I am particularly interested in tomography, and I know of the ...
13
votes
2answers
610 views

Data extraction from a picture of a graph

How can I extract data from this picture of a graph? i = Import["http://i.stack.imgur.com/Ac8m0.png"]; The caption of the picture reads: " Two-dimensional ...
7
votes
1answer
129 views

Pre-processing and deconvolution of CLSM images

I have some confocal laser scanning microscopy data sets that I want to binarize for further analyses. Due to the fast bleaching dyes and the general scanning duration we established a setup which ...
0
votes
0answers
72 views

Detection of blurry object

I have a series of very similar images (8bit gray-scale, png) where I track an object. The problem is that it is blurry and its brightness is comparable to the background. Below is the code how I am ...
3
votes
1answer
125 views

Calculate area of apple from image

I want to find area of following apple I want to do something like this: define boundary region of apple apple=... then find area using only ...
7
votes
3answers
215 views

Identifying and removing features from scanned handwriten text

Please, can I have some ideas and help on how to identify and remove features like this one or this one from scanned handwritten text like this: These features are not connected to other text ...
3
votes
1answer
106 views

Background removal of gradient background

I am trying to calculate the sum of intensities present in my agarose gel: I want to compare the intensity of the total white band on the top with that of the one on the bottom. The idea is to ...
27
votes
4answers
3k views

How can Mathematica be used to create images like these?

Here are two examples of artistic image interpolation using just black lines: TRIANGULATION: ANGULAR CELEBRITIES DRAWN WITH A PEN Interpolation for Triangulation-represented Digital Image The ...
1
vote
0answers
46 views

Magnify Part of a 3D Graphic [duplicate]

I have a 3D Graphic built, and I want to magnify part of it. I would prefer a circle or ring-shape that can be placed anywhere in front of a 3D graphic that would magnify it. Ultimately, I want to ...
2
votes
2answers
128 views

Multiple object detection and tracking in images

The code below: reads in a number of png images, where the background is dark and objects of interest (here 3) are bright dots determines in each image the coordinates and other information ...
1
vote
0answers
57 views

How to enhance the radial edges of an image

I have an image as follows: I want to enhance (not binarize) only the radial edges passing through the center so that it should look like this EDIT: Following the suggestion of J. M. I applied ...
4
votes
2answers
162 views

Delete all mostly white images in a folder

I need to delete images that are all or mostly white, here's a sample of them: Here is my my code finds, my code is not very accurate nor efficient: ...
4
votes
1answer
238 views

Mathematica's morphological thinning algorithm

Could anyone cite some papers that describe Mathematica's morphological thinning algorithm?
1
vote
0answers
70 views

Build basic Adobe Kuler-type construction: improving performance / speed

Adobe Kuler is a useful web tool to create colour palettes, but it is limited to 5 colours. I am trying to make a basic Kuler-type construction, but it is very slow, and crashes on my computer for > ...
2
votes
0answers
50 views

Finding position of text returned with `TextRecognize`

I am trying to extract data from images (using some of the methods presented in [1524]), and would like to have a way to selectively cover/remove text from axes and legends. ...
15
votes
2answers
958 views

Can Mathematica recompose an image?

The OP in this post on superuser.com asks how to recompose an image; quoting: I have a set of images, which are parts of a bigger image. I would like the images to assembled as automated as ...
1
vote
1answer
91 views

Make a glyph using the BezierCurve function

There are a lot of applications that you make a glyph from a scanned image. Mathematica does have fine tools to interpolate curves like the BezierCurve[] function. ...
5
votes
1answer
105 views

How to return position of one image inside of another [duplicate]

With ImageAlign result is another image, that is composition of another two. But I'm looking for function that will find position, x-y coordinates of smaller image ...
1
vote
2answers
201 views

Analyze pixel color distribution by sampling image over a defined area size (or grid?)

I have an image of different colored particles (red, green, and yellow) that are all mixed up against a black background. I am interested in knowing what color each particle has for its neighbor (if ...
3
votes
1answer
553 views

Count flowers in an image [duplicate]

How to count all flower in this image by using Mathematica? It is possible to detect red objects and then remove background? I guess this blog may be useful. and this question, "Count Elements in ...
3
votes
0answers
74 views

Resolution of geographical image [duplicate]

There is a simple code to draw a polygon showing Georgia, but resolution is low: ...
1
vote
1answer
138 views

Image Filtering in the frequency domain

Here is a good starting to fiter image in the frequency domain lena = ColorSeparate[ImageResize[ExampleData[{"TestImage", "Lena"}],{121,121}]][[1]]; (Create a ...
1
vote
0answers
72 views

Image-Processing/IntensityCentroid [closed]

To get the center of mass of a grey scale picture I would like to use ComponentMeasurements with IntensityCentroid. However the ...
6
votes
1answer
120 views

Filters on image vs data

I was using GaussianFilter and realized that applying it to an array yields a different result from applying it to an image. For instance: ...
1
vote
1answer
67 views

How to complete boundary in masked image?

I am trying to generate a mask of the elliptical boundaries in this object. Any ideas on how I could complete the edge of a partially filled elliptical object? Thus far, I've obtained a mask that is ...
3
votes
1answer
75 views

Morphological extension of an image mask

The following image is a mask derived from an imaged feature which extends to the top of the frame, but due to some lighting effects the top portion doesn't come in. Bear in mind that this is one ...
0
votes
0answers
44 views

3D curvature from Segmented Image

i have a CT - scan which i have segmented and i can visualize different phases as voxels. I can also identify blobs and visualize them as well. Is there a automatic way that i can compute the ...
1
vote
0answers
34 views

Fast Creation of Label Matrix for Use With ComponentMeasurements?

I am taking a lot of measurements from regions of interest in microscopy images and am finding that generating binary masks to use with ComponentMeasurements is rather slow (at least it's slow the way ...
1
vote
1answer
135 views

Speed Up Sampling of Perimeter of Polygon

I have a polygon whose vertices (points) are defined by some image coordinates that I have manually selected. The polygon is used to create a mask for a region of interest in a microscopy image. ...