Questions tagged [image-processing]

Questions on the image processing capabilities implemented in Mathematica.

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50 views

Is it possible to extract data from the following density plot? [closed]

Consider the screenshot of some density plot: Its pdf version may be found here. The plot is from this paper (Fig. 4). Could you please tell me whether Mathematica can extract the data from this plot ...
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34 views

Change in ComponentMeasurements, HighlightImage, or Epilog for Version 12?

A convenient way to check the results of ComonentMeasurements is to show the results using Epilog. However, one of these ...
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2answers
323 views

How to recreate this image warping effect?

I'm looking to create image warping effect that looks like this animation, which resembles a misshapen magnifying glass being moved over a background: Not sure where to start, but here are some ...
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1answer
88 views

Making features of an image more prominent

For the image below, would like to make the heavy black downward sloping lines more prominent and the fine gridlines in the background less prominent. Also, would like to provide operations for the ...
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2answers
218 views

How to create this image with the current colors and as a mesh?

I need to create this image bigger with that coloring, and also as a mesh or wire structure, please help me. I tried to connect the dots, but it didn't work and I deleted it There is some command ...
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2answers
332 views

How can I extract the edge points from an image?

I want to extract the edge points from a text image and use ListPlot[points] to visualize those points: I tried to used ...
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1answer
111 views

How to display an image pixel by pixel randomly

I want to display an image that each pixel appears randomly, the final result is an image without noise. I have tried this, but the result is not what I expected, How should I fix it? ...
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2answers
51 views

Composition of images with different dimensions

I created a code to make an image composition ... ...
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1answer
58 views

How to remove the parallelepiped that encloses the writing or make it invisible?

I have this code that I found somewhere and I love what it does, I've been checking the "line" command to remove the line or make it invisible but I can't get it, and the other part of the ...
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1answer
76 views

Create concentric circles with numbers inside

Hello there if you can give me a hand I want to create and export to pdf the following figure, which if you realize forms the multiplication table. The idea is to be able to control the central number ...
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71 views

Morphing between images

With Mathematica it is possible to continuously morph between images of different faces. But I was wondering if it is also possible to morph between images of any kind? An example that uses Artbreeder ...
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2answers
59 views

How to efficiently upsample a greyscale image to generate a representative binary image

I want to create binary images by upsampling a series of greyscale images (192 x 144 resolution) by a factor of 10 with the new pixel values being a pseudorandom distribution of 0's & 1's based on ...
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1answer
106 views

How to import and cut n images in 6 parts hopefully proportional to the written and export them to a directory?

I tried to get it well formatted but I won it I hope the question is understood I'm using the google form which allows you to do multiple choice tests, if they were language no problem, the problem ...
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2answers
215 views

Adding contour to images

I intend to optimize my work by adding an outline to my images automatically. I'm leaving this image as a reference for testing: I can make an outline of the image, but with poor quality ... ...
2
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1answer
71 views

Find the dots on an image

has anybody a idea on how to detect dots centers on this kind of image. Here dots host a black and white contraste (or white and black) and are almost touching each other. This make it difficult to ...
2
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1answer
102 views

Replace eyes in pictures

I have two images: img1 and image 2 I want to replace the eyes of image 1 with those of image 2. I want to do this in an automatic fashion because I want to try this with several images of this face ...
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40 views

Problem with batch processing of images

I am having some problems with a palette I have designed to apply identical image processing to microscopy images. I would like to apply identical processing across a folder of images (representing ...
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0answers
52 views

FacialFeatures not working with high quality picture

I have the following picture (1280x720, png) on which I want to detect the Facial Features: FacialFeatures[pic,"Landmarks"] But it is returning an empty ...
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2answers
85 views

How can I find all the rectangles in an image when they overlap?

When I apply MorphologicalComponents to images like the one below (which consist of white rectangles laid on a black background), I get a single object returned, as ...
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1answer
74 views

Segmenting a binary image into three parts

I am trying to segment a binary image into three parts, head, body, and tail. The binary image is a stack of tiff files of a moving fruit fly larvae. I was able to do this initially by removing points ...
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65 views

Mathematica 12.1 Crashes when making large partitions of an image

I need to partition an image of dimension 1000 x 1000 for 200 x 200 parts. In order to do so I am using ImagePartition function but when I try to display the output ...
3
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1answer
93 views

Is there a more practical way to remove backgrounds from a list of files in a folder on my computer?

Is there a more practical way to remove backgrounds from a list of files in a folder on my computer? Example: Imagine a folder with three image files... Unfortunately I waste time manually renaming ...
4
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1answer
90 views

How to combine image in specific positions

Daily I make an image composition with background (background) in alpha channel in the following dimensions: 558px (length) and 465px (height) ...
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0answers
28 views

Faster alternative to ImageCorrespondingPoints?

I'm trying to use ImageCorrespondingPoints to register frames in a video sequence. Computational speed is an important consideration for the application I am ...
2
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1answer
59 views

Reciprocal Coordinates in discrete 2D Fourier

Is there a way to obtain the transformation of coordinates along with the Fourier transformation of a discrete data set? Say I have some pixelwise information ...
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1answer
45 views

2-D Fourier series components from image

Suppose I draw a black/white image where the color black represents 1.0 and the color white represents 0. Is there a way to extract numerical estimates for the coefficients of a (real) 2-D Fourier ...
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72 views

How can I extract the center circular part from a series of images?

I am struggling to find an image processing algorithm for some images, two of which are shown below. I have 50 such images. I want one algorithm that will process all of them and produce binarized ...
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1answer
78 views

How to separate elements from an image

I have this file that will always have a white background and I would like to separate the elements into separate files, but I don't know which function to use. This is the file: ...
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1answer
88 views

count stars from an image , is this possible with mathematica?

I was wondering if "MATHEMATICA" with the amount of instructions it has has any to count points in an image, in this case stars, I imagine comparing contiguous pixels and if they are not ...
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1answer
32 views

Consistent pixel assignments in ClusteringComponents?

I have a large dataset of SEM micrographs I am trying to binarily segment via ClusteringComponents, and it has seemed to be the most accurate method compared to the other binarization functions, e.g. ...
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1answer
86 views

Extract data from picture of experimental instrument

I need to transform many pictures of an analog clock with only on pointer ( the one of hours ) in the corresponding numerical data. Is it possibile to do it with mathematica? I would like to find ...
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1answer
277 views

Looking for AR (augmented reality) projects in Mathematica

I’m looking for any links or notebooks involving augmented reality. Any tools out there for Mathematica like ARKit?
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73 views

Hidden Metadata in DJI drone .JPG

I have imported a JPG file with MetaInformation (Exif/XMP) however all the available tags are not imported. The JPG is a DJI drone image with meta information as: altitude, YAW, GeoPosition, etc. Some ...
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1answer
51 views

How can I generate a convex hull of a binary image?

I have a binary image (img) as shown below and I wish to generate a convex hull of the white region. I tried to use ...
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1answer
135 views

Extracting a Mathematica approximation of a curve from an image

Suppose I have an image like the following: and suppose Mathematica knows the correct scale of the image. Is there a way I could get Mathematica to approximate this with, say, a Bezier curve? ...
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1answer
120 views

Computing density of particles and distances from microscopic images

I am analysing microscopic particles images of the kind shown below, and primarily I am interested in learning whether in Mathematica one can extract structural properties of the particles using the ...
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1answer
43 views

Removing white space from GraphicsRow and configure FrameLabel

I have this code for three graphs shown side by side. They have the same x,y ranges: ...
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1answer
97 views

Mathematica 12 HighlightImage doubles image dimensions ! Bug?

My scripts that use HighlightImage stopped working after upgrading to 12. I discovered that HighlightImage doubles the Dimensions of the image, see below. Bug ?? workaround ? I need the exact same ...
3
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1answer
127 views

Fast approach to do Summation in Compile[]?

My code does massive Summation and Matrix multiplication Compile[] has boosted it distinctly. But I read some literatures related to my program, It seems there are ...
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0answers
52 views

Extracting Blank Frames from Imported Video

Go easy on me; it's my first question. But please do let me know if I'm doing something wrong. When using VideoExtractFrames, I'm getting blank and black frames from my video. I get the same problem ...
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1answer
57 views

Recognizing letters in grid with TextRecognize

Here is the test image: You might recognize this as a Boggle board. I want to translate the image into a 4x4 array of letters. Not quite sure how to deal with rotated letters and ambiguous letters ...
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57 views

Image merge and white balance

I have three images of red, green, and blue channels of white particles. I wonder if anyone can help me to merge them and balance the white so that the particles in the merged image looks white. ...
3
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1answer
79 views

How to generate blobs of a given circularity?

I'm trying to generate some "imaginary" geographic regions (think of it as islands, for instance), by generating random blobs/blots. Currently, I'm using Szabloc's blotc[] function. However, ...
5
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2answers
260 views

Basic questions on matrix multiplication [duplicate]

I'd like to implemente a matrix multiplication among three matrices sized at 1*256, 256*256 and ...
5
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1answer
95 views

Merge vertexes that are close together in MorphologicalGraph

Suppose I have a image and I take its MorphologicalGraph by using the following code: ...
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2answers
167 views

Extract individual white parts of binarized image

Suppose we have an image, like so: and I managed to create its MorphologicalGraph by using ...
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1answer
75 views

How to remove indentation from an image border

I have the following image (fig 1) with the extracted points from the geomagic software (Please see the point list in the attached link). https://pastebin.com/K51N8Kfa I would like to know how I can ...
2
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2answers
56 views

Combine image with URL into one image

I have images from the internet and the corresponding URLs. I want to combine the image and the URL into one image. I don't want the URL to be placed over part of the image, but want the URL under the ...
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0answers
27 views

Acquiring images from Zwo ASI camera in Mathematica Home Edition v 11.2.0.0

I plan to use a ZWO ASI planetary camera (USB connection) for astronomical photography and would like to control the image acquisition using Mathematica. The issue is that although I have installed ...
2
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2answers
50 views

Counting distinct values over sliding windows in images & lists

I am trying to count the number of distinct colours in a $5\times5$ box, (a radius 2 filter) at all points over a quantized image. I cannot seem to get anything out of the following code except for a ...

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