Questions tagged [image-processing]

Questions on the image processing capabilities implemented in Mathematica.

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1answer
51 views

Track the location of of dot from noisy image

https://imgur.com/a/SnTYESG (subtraction between the image) https://imgur.com/a/ZdOS5wf (orignal image) From the original image, since my CCD camera is bad, I cannot really see anything. However, ...
26
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2answers
1k views

How to project 3d image in the planes xy, xz, yz?

Some idea of how to do something similar to the image, but with any 3d object
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0answers
44 views

Raman graphs and indexing [closed]

I would like to make a plot with indexed peaks. Is it possible to do that programmatically? I want to do it to show the value of the raman shift in the plot.
0
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1answer
133 views

Creating a numerical table of values and using an interpolation of them to transform pixels in an image by the ImageTransformation command

I am trying to carry out point "Implementing Map" on this paper Interstellar wormholes however I am using my own equations not those given (only the same method). I have generated a list of values ...
1
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1answer
35 views

List of all points on the edges of the image

What is a easy and fast way to get a list of all points on the edges of the following image ? img = Import["https://imgur.com/1sAtNOk.png"] I tried to using the ...
7
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2answers
70 views

UpdateInterval doesn't work with Dynamic[CurrentImage]

I work on image processing using images from webcams. It's connected via USB and I get "live" images by: Dynamic[Refresh[CurrentImage[], UpdateInterval->5]] ...
15
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2answers
654 views

Processing images from NASA's Juno Jupiter Orbiter

Question Can you help me improve what I’ve done to create an enhanced-color picture from an image provided by NASA’s JunoCam? [My work is shown in the penultimate image of Jupiter in this post.] I’...
3
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1answer
92 views

Good book on image processing and analysis on Mathematica 12

Can someone recommend a good book on image processing/analysis and graphics on Mathematica 12?
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0answers
29 views

Setting the location of the origin within an image for AffineTransformation

This question is closely related to this one, but slightly different. I want to perform several AffineTransforms on an image (myImage). For example, here is a ...
6
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1answer
170 views

How to track a deformable rod in video?

I have a video of nanotubes in solution taken with a confocal laser microscope. I typically track these nanotubes with Fiesta or Fiji, but in this case, there is variation in brightness that is ...
12
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1answer
2k views

How to make a spiroglyphic?

Some (older) members of this group might remember playing vinyl LP records. Recently, at the Abbey Road studio there was a spiroglyphics coloring book for sale. It looks like a nice programming ...
2
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1answer
33 views

What's wrong with my masking in this ImageMeasurements?

I want to find the mean color of an image's region defined by a polygon, and I tried this: ...
3
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2answers
119 views

Find gridlines in image of blots arranged in a grid

I have an image with a grid of equal separations. I would like to detect the lines in this image. I tried with ImageLines in but it does not work. @MelaGo Thank ...
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0answers
56 views

How to extract numerical data from plot images automatically?

how can we automatically extract numerical data from plot images in MMA (.dat or .csv file)? For the test image (two curves in one image), x=[0 40]; y=[0 1] if we use e.g. "getdata-graph-digitizer" ...
4
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2answers
153 views

Extract partitions of images after edge detection

Given a edge detected image like this: I would like to extract each character into a sub-image, i.e so that each new picture only have one character. Is there a simple way of doing this in ...
7
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1answer
86 views

Detect sub figures and split (automatically?)

I would like to take a large figure showing a sequence of individual plots and automatically split the into series of images showing the individual sub-plots (to be exported as animated GIF later). ...
2
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1answer
63 views

Hammer projection to rectangular

This might be more of a mathematical problem than a Mathematica'l one, but still, maybe you'd help me. I want to write a function that would produce a rectangular image from an image with Hammer ...
2
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1answer
68 views

How to make a video from png images

I have a set of about 100 .png images representing the evolution of the system I am studying: how do I create a video out of these images with Mathematica?
18
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1answer
688 views

Converting Image to full-length lines

I want to write a program in Mathematica that takes an image and converts it into a drawing made completely of straight full-length lines. The program should check all the lines of the image, then ...
14
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1answer
238 views

Tracking cells as they move under a microscope

I have a video (tiff file) of cells under a microscope and I'd like to segment and track the location and sizes of them across time: It has a hundred frames: I've uploaded it here (now it is public):...
3
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1answer
84 views

Convert a point in the Radon Space to a line

I need a function point2line to convert a point in the Radon Transform Space to a straight line. But I don't know the algorithm inside mathematica, I don't know ...
0
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1answer
62 views

How to extract specified objects from a pdf?

Is it possible to extract some information from a pdf file? I am interested in extracting the words before the squared brackets and the following word (in the image, for example, I would like to ...
0
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1answer
53 views

Image matching and transformation

I hope this picture can help me to be clearer. The triangles represent some values of an image (EDITED: positions). The same for the circles, but from a different image. Some values matches, some ...
3
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1answer
40 views

Find the higher degree of similarity between images and report the points in common and the differences

I am trying to analyse due different images and find their similarities. In order to do this, I need to consider the coordinates of the pixels in both images, then select the points in common, i.e. ...
6
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4answers
647 views

MaxDetect speed

What's the fastest way to find the local maxima of a 2D list? E.g. ...
3
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2answers
71 views

Compare two plots by finding the minimum distance among points

I have a question about comparing the points within two plots. I would like to compare two plots and find the minimum distance among their points, in order to find the nearest/common points (i.e., ...
1
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0answers
42 views

Is it possible to select a number of points to highlight points in an image?

I would like to ask you how I can fix a number of points to show in a picture. In the previous post (Is it possible to get the coordinates only for the highlighted points from an image?), JimB ...
2
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1answer
54 views

Is it possible to keep only coloured parts in an image, removing all the rest (in greyscale)?

I would like to know if it is possible to keep only coloured parts (for example red eyes) from a b/w image, removing all the other parts not coloured (i.e. in grayscale or black and white). I was ...
1
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1answer
105 views

Is it possible to get the coordinates only for the highlighted points from an image?

I would like to ask you if it is possible to get the coordinates or a couple of numbers that can give me the positions of the highlights points (selected using HighlightImage function) in an image. I ...
1
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0answers
39 views

Can LearnDistribution Train and Generate Images Without Defaulting To 256x256?

In spite of anything I try it seems the ConformImages[] function nested in the LearnDistribution[] function resizes images to 256x256. If I convert an image into its "Data" representation before ...
5
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2answers
142 views

How to achieve faster performance on plotting complex valued functions

I'm very interested in visualizing complex valued functions $f:\mathbb{C} \rightarrow \mathbb{C}$. Especially interesting to me are Möbius transformations. I found a nice way of visualizing these ...
5
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0answers
84 views

Recognising people from photos

I have a large number (probably 10000) of personal photos taken over the last few years, a good proportion of which contain family members. I'd like to put together a photo book of one family member,...
14
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2answers
882 views

Precise cropping with ImageCrop

Bug introduced in 8 or earlier and persisting through 12.0 or later Reported to the support as [CASE:3968587]. Published on Wolfram Community. In the presence of alpha channel ...
19
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2answers
564 views

Creating graph out of particles images

I have recently started learning how to use Mathematica's brilliant image processing tools, and the image I've taken as first example is the following (source): So far I've tried to first use ...
1
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0answers
55 views

Understanding how ComponentMeasurements finds neighbors

I am trying to understand how the module ComponentMeasurements in Mathematica works when the property Neighbors is called in ...
6
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1answer
103 views

Is there a SubImageApply?

Given an image and a subimage (as a rectangle or pixel ranges): img = ExampleData[{"TestImage", "Lena"}]; f = FindFaces[img]; HighlightImage[img, f] How would ...
5
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3answers
144 views

Including the actual length scale of the image in processing microscopic images

Following the wonderful methodologies provided in this post, I have learned how to process microscopic images of the types shown below in order to analyze them. When it comes to analysing the size ...
6
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1answer
393 views

Get date and time when photo was taken

I am trying to rename few images by their date and time taken. Is there a way to get the date and time when photo was taken using Mathematica?
1
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1answer
47 views

Why ImportByteArray when generate image from bytes

I was trying to generate an image from a list of bytes so I only had to Import an Image once as I want to store a Base64Encoded ...
6
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4answers
155 views

How to count the overlapped disks in a picture?

I have several picture containing many small circles. I can manually count the circles in these pictures but it will be time-consuming and make me tired. How can I use mathematica to do this job? I ...
2
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1answer
100 views

Doing what ImageAdjust does for a group of images

img = Import["flower.png"]; ImageAdjust[img, 0, {.00000002, .00000009}]; I know how ImageAdjust works and it is perfect for ...
50
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4answers
4k views

Mollweide maps in Mathematica

Context In my field of research, many people use the following package: healpix (for Hierarchical Equal Area isoLatitude Pixelization) which has been ported to a few different languages (F90, C,C++, ...
0
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0answers
43 views

MorphologicalTransform: What is the difference between EndPoints and SkeletonEndPoints?

What is the difference between the "EndPoints" and "SkeletonEndPoints" functions of ...
5
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4answers
1k views

Creating a realistic, photo-like 3D effect from an image or document

Suppose I have an image or a document, provided in a high-quality PDF file. You can open and view it in a PDF viewer, but then it has a kind of static look: it's not something tangible, it's just an ...
1
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1answer
143 views

How to animate a cube with images on their faces?

From this code, how could I animate (speed given by the user) this cube at random so that each face shows me a different image. EDIT(The idea is that the cube rotates at random and shows different ...
16
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2answers
330 views

How to TextRecognize a screenshot of code?

Are there any specific tricks or options to help TextRecognize work on a screenshot of an Input Cell or code in general? For example, here's a screenshot that ...
2
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1answer
82 views

Segmenting cells from a stained image of cells from microscope

I have an image which has stained cells and I have to segment all the cells. But the problem is that the cell boundary is not very distinguished where there is staining done because of the stain. ...
2
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2answers
107 views

Find Probability that Image Is Text

I can find out whether an image is text: ImageInstanceQ[img,Entity["Concept", "TextualMatter::m7642"]] And if an image is most likely text, I can find out the ...
15
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1answer
313 views

Why does ImageFilter fail with radius 1, but works with radius 2?

Bug introduced in 9 and persists through 12.0.0 When thinking on a way to answer this question using ImageFilter I have found (with Jason B's help) that we can ...
2
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1answer
102 views

Plotting large scale image embeddings

I'm looking for help making publication-quality graphics for visualizing 2D embeddings of image datasets, so that they look like this: These two-dimensional embeddings of thumbnails (sometimes with ...