Questions tagged [image-processing]

Questions on the image processing capabilities implemented in Mathematica.

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6
votes
3answers
232 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 ...
2
votes
1answer
346 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 ...
12
votes
1answer
163 views

“Boundary” thickness in HighlightImage

Bug introduced in 11 or earlier and persisting through 11.3 CASE:4076121 I'm having a hard time to understand how I can use HighlightImage and only draw the ...
7
votes
1answer
297 views

Area of a image region

I've applied Mathematica to the problem of estimating the area of an estuary, but when I got the results I wasn't able to understand in which unit of area it was given. My approach is the following: ...
7
votes
1answer
156 views

What is the logiс behind handling alpha-channel by various image-processing functions?

(Cross-posted on Wolfram Community.) When working on the answer to this question I discovered that starting from Mathematica 10.0 the behavior of such functions as ...
7
votes
1answer
3k views

Removing gutter shadows from scanned pages

I am new to image processing, and I was hoping someone might set me in the right direction. I am trying to create a simple toolkit for personal use for digitizing scanned book images into a database. ...
5
votes
3answers
711 views

Tile image on specific location without space between them [duplicate]

Possible Duplicate: How to combine images with the same dimensions in a grid? I would like to arrange images without any space between their edges as each piece is made to connect with others. ...
4
votes
2answers
267 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
3answers
1k 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 ...
3
votes
1answer
1k views

Generating x,y coordinates for an edge detection of image [closed]

i have a photo and I want to obtain the coordinates in a table form of its edge so that I could input the data into Autodesk Inventor May I know how I can do it
2
votes
1answer
240 views

Understanding the computation of IntensityCentroid?

If I have an image img, and I ask ComponentMeasurements to return "IntensityValues" for the ...
0
votes
1answer
223 views

TextRecognize with crosses, circles and spaces results into oddities, why?

I am investigating this answer here about detecting crosses and circles with TextRecognize. I tried to solve this problem here by directly using the builtin command TextRecognize but it does not work ...
9
votes
3answers
333 views

Applying a transformation rule on an Image

I haven't been able to figure out why the following doesn't work: ...
7
votes
2answers
317 views

How to resample a list of Images

I have a list of picture(Noting the ordering) first: second: third: forth: My target is get the 3D'image,Now I get the mask of it like following(If you use ...
6
votes
2answers
283 views

How to get a deformable mesh from this binarized image?

This question is linked to previous question but significantly different: how to get cell boundaries in the image I am using Mathematica 10.2. I have a binarized image (see below) and wish to get a ...
6
votes
3answers
3k 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 ...
5
votes
4answers
467 views

How to get a smooth outline

I have a outline image img=Uncompress[FromCharacterCode[ Flatten[ImageData[Import["http://i.stack.imgur.com/cc0Mt.png"],"Byte"]]]] This is current method <...
4
votes
1answer
155 views

Problem with InverseFourier of a 2d FFT of a non-squared image

I have the following 8bit grey scale image: The 2d FFT of this image, showing the color coded Abs[fft] values, is: The code to obtain the FFT image is: ...
3
votes
1answer
120 views

How to apply GeoStylingImageFunction to graphics primitives in GeoGraphics?

From the GeoStylingImageFunction documentation you can apply different functions to the background and to geographic areas. ...
2
votes
0answers
348 views

How can estimate the PSF function to deblur an image of plate licence of a car [duplicate]

I want to deblur an image of a licence plate of a car. I have used the ImageDeconvolve[] function and Sharpen[] but the problem ...
2
votes
1answer
547 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 (...
2
votes
1answer
169 views

Extraction of specific image pixels as bytes

I have a large set (>10000) of uncompressed 8 bit images. Their size is 1600*1200 pixels. The first 24 pixels in the upper most line starting from left contain some important information (time stamp ...
0
votes
1answer
573 views

How can I count the black dots in an image? [closed]

I have put a lot of time trying to count the little black dots with Mathematica image processing tools, but I have not been able to make it get the right count. Please help me.
33
votes
5answers
12k 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!
46
votes
2answers
10k views

Image Shadow Removal in Mathematica

The task is: Image shadow removal is an important topic in image processing. If you feel curious about it, you may take a look here, or just google for it image shadow removal There are also a few ...
26
votes
7answers
3k 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 ...
34
votes
1answer
1k views

Drawing Clifford Attractors in Mathematica

I came upon the "Clifford Attractor" today, which are equations of the form: $$x_{n+1}=\sin(a\ y_n) + c \cos(x_n)$$ $$y_{n+1}=\sin(b\ x_n) + d \cos(y_n)$$ They create some incredible images by ...
21
votes
1answer
923 views

Extracting road curves from an image

I have taken several gps readings while driving around town. ...
25
votes
2answers
2k views

How to stitch two images together

I have talk about how to catenate two images whose have same part totally in my this post. But in this case two images have similar information, not totally same. ...
15
votes
3answers
2k views

How to remove constant background from an image?

I'm not sure how to remove the paper background from this logo with v9. This is really not the same as this question, but I think similar methods apply.
27
votes
1answer
5k views

Is there a way to convert an image into a Graph?

I'm trying to convert an image with several overlapping dots into a Graph. The goal is to be able to derive the Kirchhoff matrix for the randomly created "network ...
37
votes
2answers
1k views

Cleaning mildew from old documents using Mathematica (Image processing)

While visiting family over the holiday period, I managed to have some good mother-daughter bonding over how far back I’ve managed to trace the family tree (Mom is in her 80s and doesn’t do computers). ...
32
votes
2answers
1k views

Generating animations of clouds with Mathematica

I'd like to generate some visually-pleasing animations of clouds, fog or smoke with Mathematica. My idea of "visually-pleasing" is along the lines of one of the images on the Wikipedia article for ...
27
votes
4answers
2k views

How to merge several partially overlapping screenshots into one image?

I have two screenshots: For a long screenshot picture I usually use PhotoShop to combine both images: How do I use Mathematica to make an automated program to do this? Is there a smarter method?...
21
votes
2answers
774 views

Reconstruct a graph from an image (curved edges and edge crossings)

Actually, I posted a very similar question before this.How to generate a Graph from a picture of a graph Dr. belisarius's answer have answered that question, but I find a limitation in that method: ...
18
votes
2answers
1k 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 ...
15
votes
1answer
504 views

Quickly importing several thousands of jpg files?

I have several thousands of small .jpg files (30kb each) which I need to import into Mathematica. (I plan to use ImageDistance ...
13
votes
2answers
2k views

Image Processing: Isolating areas of an image with internal irregularity

I am trying to isolate each of the blue painted fingernails in the image. However, I am not sure what approach should be considered due to the white design on each nail interrupting the otherwise ...
16
votes
2answers
296 views

3D Thinning algorithm in Mathematica

as far as I understood Thinning[] only works on 2D images thus far. Is there a library/piece of code that performs 3D Thinning in Mathematica? Max edit: I want ...
25
votes
3answers
2k views

Convert binary voxel image to geometric region

I have a binary voxel image which described a contiguous region in space. Example: ...
19
votes
1answer
2k views

Rotating perspective of an image in the z axis

A purely recreational question, but one I hoped the community would find interesting enough to suggest a way to approach it. Let me preface this question with the admission that I have done nothing ...
18
votes
2answers
1k views

How to measure segment length and branch angle

I am trying to measure segment length and branch angle or bifurcation angle between each pair of segments. My image after thinning looks like this: ...
28
votes
3answers
509 views

How can I restore the old ImageCompose behaviour?

Bug fixed in 11.3 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 "...
18
votes
2answers
962 views

Efficient way to compare animated images to tell if they are the same

I have a Student license for Mathematica, and felt like I wasn't making full use of the wonderful toolkit that it is; so I looked into things like its image processing capabilities. Now, I made and ...
16
votes
2answers
609 views

Cluster a signal into areas of equal intensity

Introduction I have a greyscale photograph that I want to partition into areas of equal intensity. This means, that the integral over each partition should be (roughly) equal. There is no unique ...
13
votes
2answers
3k views

Push-pin Art – Convert image to R-Y-B-W-Blk color space

After seeing an example of what is called “Push-pin Art”, I assumed that Mathematica would be able to handle the kind of image processing required to convert an image to this format. I am not well ...
17
votes
3answers
1k views

Detecting and correcting gradational brightness variations in a grayscale image

I am trying to quantify the proportions of various components in a greyscale image (backscattered electron image of a polished rock sample). Here is the original image: ...
16
votes
1answer
565 views

Automatic edX Pdf Handout creator

I am trying to make an automatic handout creator for my courses on edX. It took me a long time to do it... (If you don't know edX: https://www.edx.org/) I wrote a program that adds to each slide ...
15
votes
3answers
626 views

How to speed up Colorize

I have a list of about 500 images similar to the following: A = Import["http://i.stack.imgur.com/1bV4O.png"] ...
15
votes
4answers
902 views

Poor results with ImageLines function

I'm trying to get my mind wrapped around Mathematica's image feature recognition functions. I'm intrigued by the ImageLines function for a couple future ideas I ...