Questions tagged [image-processing]
Questions on the image processing capabilities implemented in Mathematica.
1,626
questions
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Making a Scanimation
Scanimations are also known as a barrier grid animation. These work by overlaying a screen with black (or in the gif below, red) bars separated by transparent bars.
The red bar width is an integer ...
- 4,262
3
votes
1
answer
153
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Convert black and white pictures into color images
I have a digital image of an old black and white picture. Is it possible, using Mathematica, to convert this old picture into a black and white image? For example:
This transformation was done using ...
- 2,615
0
votes
1
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147
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Finding Contours in Photo to Create a Topographical Map
I am setting up a special table to simulate the scenario in this problem in this problem, but instead of finding the geodesics, I want to create a topographical map using the contours.
Here is a ...
- 383
3
votes
2
answers
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Keys in the vicinity
What I want to do is to recognize keys in the image and create a list of keys around every key that fall within a pentagonal (or similar) region. These are the ones that can be accidentally pressed ...
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Creating an If function for the probabilities of the classes of images after using NetTrain
So I have 3 Classes the model can output after veiwing an image, at the moment it has a 70% accuracy, however this is not an issue as the plan is unless it's 85%+ sure on the Probability of the class ...
19
votes
1
answer
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Efficiently Mowing Grass with Mathematica
Recently, I was mowing my yard and was thinking about how to use the least amount of time/fuel and how to simulate.
Mowing a yard that is shaped as a convex polygon is not difficult, you can just make ...
- 383
4
votes
2
answers
196
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Gray level shading of image histogram bins
How to shade bins in an ImageHistogram to match the image GrayLevel?
Inputs
Import the following graphic:
...
- 1,050
13
votes
1
answer
298
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Lens on a map. Realistic imitation of magnifying glass on images with text and other small features
UPDATE: Code from this post was used for video generation here:
Cinematically moving a lens over images: magnifying glass effect in videos
I am trying to create a magnifying glass effect for images ...
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0
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Morphing curves with ImagePeriodogram
Any idea how to achieve smooth transition from one image to another (so that the curves are morphing from one shape to another)?
I am aware that ImagePeriodogram ...
- 9,868
1
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2
answers
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How to calculate the depth of the lake in mathematica?
I want to calculate mean depth of Goose lake (mean depth=4.6 m), I use bellow command for this operation, But this command is not automatic and we have to create the coordinates manually, and on the ...
- 159
7
votes
2
answers
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Getting Area from GeoGraphics
I want to find the area covered by the reservoir of a dam using a satellite image.
This is what I have so far.
...
- 51
8
votes
2
answers
350
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Reverse the rotation of an animated gif and create a mirror image of it
I need Mathematica code to reverse the rotation direction and viewpoint of an animated GIF named "wheel." The current rotation is counterclockwise, and I need it to rotate clockwise while ...
- 309
3
votes
0
answers
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How to estimate Lake area and volume in Mathematica?
I have a satellite image of the lake and I want to estimate its area and volume.
Actual volume:1.49*10e8 m^3
Actual Area:36.9 km^2
I did the following command to find the volume, but it is not very ...
- 159
1
vote
0
answers
43
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Finding and manually weeding out images in ClusteringComponents clusters
I have processed images using the following code, where list1 and list 2 are x and y axes, sample of images:
...
- 113
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votes
0
answers
58
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How to extract shape from image in the Mathematica?
I have some satellite images for the lakes. How to extract the shape of the lake with maximum accuracy from the image?
- 159
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vote
0
answers
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Finding how far an image has moved a very small x distance
I am trying to process 200+ images (10 datasets, each set contains ~20 images) and see how much each image changes or moves compared to a starting position for a dataset. The problem is, I expect a ...
- 113
1
vote
2
answers
128
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How to do edge detection in Mathematica?
I have some pictures of water level and I want to do edge detection, I used the following command, but this command is vertical edge detection and I want horizontal edge detection and water level. ...
- 159
3
votes
1
answer
49
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Obtaining the numerical value of barcharts from a plot in an image
I am struggling to obtain the numerical values {x,y} of the barcharts in this plot. Ideally with an automated routine.
Time ago, I developed a routine to do it in ...
- 1,271
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votes
4
answers
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Converting an Unicode's image into polygon data for an SVG
So, I have the the Chinese character 熙, which I can easily turn into an image:
img=Rasterize[Text[Style[FromCharacterCode[{29081}], FontSize -> 300]]]
which ...
- 383
0
votes
0
answers
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What is the network structure of Ademxapp Model A1 Trained on Cityscapes Data in the Mathematica?
I want to implement the model (Ademxapp Model A1 Trained on Cityscapes Data) on my data for segmentation, so I need the partial structure of this model, can anyone help?
- 159
2
votes
3
answers
157
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How to design a mountain logo
I want to create mountain logos similar to this one:
I started accumalating random integer sequences looking for a
solution with the Filling-option of ...
- 48.5k
0
votes
1
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76
views
How to take a satellite image in Mathematica at different times?
I want to see the satellite image of the same area at different times. But by entering the following code, also shows the same picture with changing times.
...
- 159
2
votes
0
answers
119
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How to get satellite image directly from Mathematica?
First, I get the image of the bands of the desired area from the site https://earthexplorer.usgs.gov/, then I import the images into Mathmatica by addressing them as below:
Select dataset directory:
<...
- 159
3
votes
1
answer
123
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Cluster defects in microscope image
How to detect defects in the image? The code doesn't need to find all small defects, but I would like to reliably detect the 3 largest defects.
My current solution, but it is missing the larger ...
- 41
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votes
0
answers
102
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Calculating the two-point correlation of pixel intensity in an image
I'm dealing with a monochromatic image represented by a matrix of pixel intensities, something like this:
myImage = {{1, 4, 6}, {0, 3, 1}, {9, 1, 1}}
I wish to ...
- 171
1
vote
1
answer
49
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ImageResize change image pixel value range
I have a weird image in my notebook. If I do ImageResize to it. The pixel values of this image is changed.
Sorry, I can not share this image directly. As you can ...
- 17k
4
votes
1
answer
137
views
How can I increase boundaries accuracy in satellite images?
I use the following codes for this work on Mathematica, but they have low accuracy. I would be grateful if you could help me improve accuracy.
The codes are as follows
...
- 159
3
votes
1
answer
100
views
How to identify ellipses in grainy images and measure their position, semi-axes and orientation?
I am trying to analyze images of elliptical laser beams that are striking 'ground glass' surfaces. I need to determine the size, position and orientation of the ellipse that represents the boundary of ...
- 107
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1
answer
99
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2
votes
1
answer
246
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Moving disk over a underlying image
I want to make the following animation. The basis is a image, for example Lena's photo. I will place a new layer over this image. This layer has a color, for example black. In this layer there is a ...
- 2,615
6
votes
2
answers
171
views
How to connect dots and segments on image to form continuous curve?
For example, I have images like
or
How to connect those segments to form a continuous lines are immediately obvious to the human eye. But how to do it automatically with Mathematica?
- 17k
1
vote
0
answers
45
views
Cannot use perimetric complexity function in Mathematica
I am very new to Mathematica, so I'm having difficulties troubleshooting the code that I am trying to resolve (I'm much more familiar with R, but sadly I haven't found a package to do this). In any ...
3
votes
1
answer
106
views
Evaluating a questionnaire from image
I want to evaluate a questionnaire made at school. The survey is made on paper and I will scan it. So I have an image with all the questions (44 questions). What I am looking for is which number was ...
- 1,434
1
vote
1
answer
128
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How to get DFT from Sound/Audio/Image?
When I'm trying to do Discrete Fourier Transform or just get a ListPlot of values from Sound object, I get error message..
I understand that Fourier command (and ListPlot of course) works only with ...
- 21
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vote
0
answers
63
views
Calculating luminance in $\rm{cd/m^2}$
Let's say I have an image of the following transparent material through which light is passing,
I want to calculate the luminance in units of $\rm{cd/m^2}$.
What I did is
...
- 811
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0
answers
99
views
How to fix Vignetting?
Such as this photo:
I want to remove the dark corner to get this result:
I know this is easy to remove in Photoshop, but I'm a MMA user so I want to know how to process it with MMA...
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0
votes
1
answer
60
views
Tiff image height fft
I wanted to import .tiff image to Mathematica and then plot fft of z values (height) of the image i. e. values which are translated to color in the image.
I know that total time to create picture was ...
2
votes
0
answers
93
views
Creating a size changing image in output cell
In the following video, there are Image 1 and Image 2.
The image size of Image 1 changes ...
- 4,047
0
votes
1
answer
66
views
Adding unit square axes to an array plot
I want to take the image created by ArrayPlot of a matrix A and add axes with the origin at the top left so that the image looks like the density plot of a function on [0,1]^2.
...
0
votes
0
answers
37
views
How would I convert AircraftData[] to an Entity[] that could be used with ImageIdentify[]?
I am working on a Design of Experiments to determine the image adjustment settings for a given collection of aircraft images to maximize the probabilities of correctly identifying the aircraft types ...
- 2,259
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votes
0
answers
50
views
How could I draw a picture by connecting stars between them?
My idea is to try to make a program which would be able to trace a given picture in the sky, by simply connecting stars. Therefore, I have two questions.
Is it possible to convert the product of an ...
0
votes
1
answer
52
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3
votes
1
answer
80
views
Is it possible to ask Mathematica to crop only the red area in the given code?
I am using this code
...
- 349
1
vote
1
answer
41
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Why does ImageRecognition recognise some concepts in a list of concepts but not others?
Why can I successfully use an option list of the dog and cat entities with the ImageRecognition function but not use a similar option list for two aircraft entities
- 403
1
vote
2
answers
106
views
How to set the width of grid elements in cm?
As a 'painter', I use photos. To get a good projection of a photo on the canvas I use a grid. I draw this grid both on the canvas and on the photo. It is an easy way to get the proportions right that ...
- 2,615
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votes
1
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What's the expression of transformation T in area-based Image operations such as ImageFilter and ImageConvolve?
in the “tutorial/ImageProcessing”, as the following picture shows
I just wonder what's the expression of the T in the area-based image operations such as ...
- 343
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votes
1
answer
70
views
Detecting lines in a 3D dataset
Premise
I have a 3D dataset of a system responding to different frequencies
https://pastebin.com/9MyQ6S74
(x: imposed frequency (f1)
y: response frequency
z: response amplitude)
I know that the system ...
- 1,396
8
votes
1
answer
239
views
Automatic image recognition of Lissajous figures on oscilloscope
I have thousands of oscilloscope images showing Lissajous figures for example like below 4x5 image collection
Define a function that can generate various Lissajous figures
...
- 17k
1
vote
0
answers
49
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Why CUDAImageMultiply so slow in such cases? How can I speed up it
When I'm doing Image composition task, I want to use CUDAImageMultiply to speedup my performance, however, After trying it, CUDA is very slow, I've tested the ...
- 8,557
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1
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How to compare two ParametriPlots for different problems?
I have solved the following problem for these two situations and created their plots. Now I want to contrast the same axis system in the two plots. I used ...
