Questions on the image processing capabilities implemented in Mathematica.

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10
votes
2answers
561 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 ...
10
votes
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 ...
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: ...
22
votes
2answers
984 views

How to retrieve the parameters calculated and used by ImageAdjust?

When ImageAdjust is called with an image, i.e. with one parameter, it returns an automatically adjusted Image. I would like to ...
6
votes
1answer
85 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 ...
13
votes
0answers
154 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 ...
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 ...
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,...
7
votes
3answers
218 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 ...
1
vote
0answers
65 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
74 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
70 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.
15
votes
2answers
194 views

How can I restore the old `ImageCompose` behaviour?

Update This issue caught me out again so I contacted support once more. They have confirmed that the development team considers the new behaviour to be correct and claim that "ImageCompose uses ...
47
votes
1answer
4k views

Measuring fractal dimension of natural objects from digital images

This is a useful topic. A college physics lab, medical diagnostics, urban growth, etc. - there is a lot of applications. On this site by Paul Bourke about Google Earth fractals we can get a high ...
6
votes
1answer
123 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 ...
2
votes
1answer
72 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 (...
10
votes
2answers
249 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, ...
11
votes
1answer
625 views

Fitting Vogel's formula for phyllotaxis to the image of a flower

After having read this question I was inspired to investigate how we could take an image of a plant displaying phyllotaxis and fit Vogel's model of phyllotaxis to the image. The theory is very simple. ...
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 ...
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) ...
2
votes
1answer
273 views

Histograms of gray scale images

I have a large set of subsequent 8bit gray scale png images (50 Hz). They show the noise of a CMOS camera, with the lens covered. A subset of 50 images is available here: https://goo.gl/Sa3P9P I ...
5
votes
3answers
160 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 ...
3
votes
0answers
75 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 ...
13
votes
2answers
614 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 ...
0
votes
0answers
59 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: ...
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 ...
3
votes
2answers
333 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: ...
7
votes
1answer
130 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 ...
4
votes
2answers
113 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 ...
3
votes
1answer
128 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 ...
3
votes
0answers
91 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 ...
10
votes
6answers
314 views

Coloring an image with two Color schemes based on a Range

I would like to color an image generated from some data, using two color schemes based on two ranges of the data. This is my attempt: ...
0
votes
0answers
73 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 ...
51
votes
4answers
2k views

Changing color of an object in an image

Consider the following image: How can I change all red colors in this image into (for example) blue.
17
votes
3answers
2k views

How can I efficiently “remap” an image?

Many image processing libraries like OpenCV, Intel Performance Primitives or Octave have a useful function called "remap", that takes an image, an array with X coordinates and an array with Y ...
3
votes
1answer
107 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 ...
49
votes
3answers
2k views

Composition à la Mondrian

I would like to paint something like this or,even better, like this I have tried ...
1
vote
0answers
47 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
130 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 ...
44
votes
5answers
6k views

How can I extract data points from a black and white image?

Consider the following graph (source): Is there any way to extract the data points from this image in a semi-automatic way? I have seen, and tried the methods suggested in this question, but they ...
4
votes
1answer
240 views

Mathematica's morphological thinning algorithm

Could anyone cite some papers that describe Mathematica's morphological thinning algorithm?
4
votes
2answers
163 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: ...
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 ...
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 > ...
1
vote
1answer
140 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
2answers
203 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 ...
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
963 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 ...