Questions tagged [image-processing]
Questions on the image processing capabilities implemented in Mathematica.
1,533
questions
4
votes
0
answers
101
views
High Quality animation with Export?
This is my second question here. Recently I've been trying to compile a video simulation of wave propagation via ComplexPlot[] with ...
- 93
0
votes
2
answers
102
views
Import causes image to lose resolution
I am having trouble preserving image resolutions in Mathematica 13.0.1.
The following is a free high-resolution GIF from Giphy dot com, pasted below for your convenience:
I notice that even if I ...
- 4,677
1
vote
0
answers
45
views
Recognize text in image
I have the following image and I want to extract the text on the axes. I used the following code:
...
- 2,703
2
votes
1
answer
120
views
Estimating values from a timeseries picture
I have the following picture (one of several hundred):
I want to basically read out every y-value for every year on the x-axis from this graphic and create a data table from it. For example, I want ...
- 2,703
3
votes
0
answers
62
views
Applying Super-Resolution to differently sized images
I would like to make some images larger and noticed that there is a page in the documentation for doing super-resolution using a network structure. It's called "A Model for Super-Resolution."...
- 65.7k
2
votes
1
answer
87
views
Highlight area on 3D image, volume
I am trying to highlight a specific area in a 3D image, all the solution I found was for 2D images and the functions are not compatible with 3D images if anyone has a solution, I would be appreciated ...
- 21
25
votes
3
answers
2k
views
Animating battlefield data map of war in Ukraine
UPDATE on FINAL RESULT
Thanks to @SquareOne effort I generated higher-resolution videos with smoothing transitions that can be seen here:
https://www.linkedin.com/feed/update/urn:li:activity:...
- 68.8k
4
votes
3
answers
192
views
Implementing fast linear search for perfect vertical image alignment
After experimenting with image alignment aprroaches presented here and here and some other approaches involving ImageDistance and ...
- 55.7k
2
votes
1
answer
67
views
Stitching overlapping screenshots of a page
Suppouse we have a series of screenshots of a webpage, taken by hand at different scrolling positions. All they have equal width and height and random scrolling positions.
We can imitate it as follows:...
- 55.7k
1
vote
0
answers
35
views
Is it possible to add new concept to ImageContents
I was hoping to use ImageContents to locate some specific objects in a series of images with a bounding box. However, ...
- 3,842
1
vote
1
answer
187
views
Rectangular Image Segmentation?
I'd like to segment an image such that the components are rectangles. Is this possible out of the box? For example:
...
- 30.3k
2
votes
0
answers
138
views
How to improve the accuracy of grain statistics
Grain boundaries are usually not very distinct, like pic1 , pic2 and pic3
I have made a edge mask in photoshop like the following:
Then I can detect the number of ...
- 23.1k
8
votes
1
answer
210
views
How can I create accurate image masks from Graphics?
I am looking to generate image masks using Graphics. For this, the requirements are that:
The rasterized mask must have the exact same dimensions as the image with ...
- 224k
3
votes
0
answers
58
views
Video processing: Efficient way to apply function to pixel time stack (FIJI's Intensity Z-projection)
Starting from a Video, I would like to apply a function f to the stacks of intensity values, over time, for each pixel. In FIJI ...
- 28.9k
2
votes
0
answers
46
views
Crop or mask geographics
I am trying to crop a map drawn with GeoGraphics. The map consists of Line and Polygon ...
- 393
7
votes
0
answers
310
views
Background removal with hair
I'd like RemoveBackgound to work on images where the foreground boundary is nontrivial e.g. with hair:
...
- 30.3k
1
vote
1
answer
90
views
Fitting an Equation to an Image
I'm very new to data analysis and I'm trying to figure out how I can fit an equation to an image I generated from a large set of data I collected. I'd then want to overlap this plot to the image to ...
- 51
3
votes
2
answers
200
views
Skeletonizing an image
I'm trying to skeletonize an image (ref)
img = Import["https://i.stack.imgur.com/q2xUi.png"]
graph= MorphologicalGraph[img]
Input image:
Skeleton ...
- 307
2
votes
1
answer
121
views
Generating a network from an image
This is a follow up to my previous question here
I have to skeletonize an image (ref) and convert the skeleton into a network. I've tried the following
...
- 307
1
vote
0
answers
76
views
Skeletonize an image
I'm trying to skeletonize an image (ref)
bin = Import["binary.png"]
skeleton = Pruning[Pruning@Thinning[bin], 15]
Input binary image:
Skeleton generated:...
- 307
2
votes
1
answer
104
views
How do i plot a graph for width vs height of the slits from an image
I need to calculate the width of the slits along the length of each slits. I am new to image processing in mathematica and I need to plot a graph showing how the width changes along the length.
I have ...
- 21
0
votes
1
answer
67
views
Image of house being repaired via optimization (FindMinimum) example in documentation?
In Mathematica's documentation, I recall seeing an example where a noisy image of a house was repaired using an optimization method (possibly FindMinimum) with a very large number of parameters (one ...
- 207
2
votes
3
answers
143
views
Recover data from an image of scatter plot
I have this scatter plot and regression line for which I wish I had the original data. I know I can use the coordinates tool in Mathematica to get individual points but that is very tedious and time-...
- 579
0
votes
1
answer
76
views
How to get the Histogram based on the intensity cross section of each spot?
I am supposed to plot the histogram based on the intensity cross-section of each circular area, I have done counting manually each area based on the pixel intensity cross-section of each green and red ...
- 23
8
votes
2
answers
213
views
Is it possible to extract vertices and lines from this image of nonplanar graph?
The recent post was particularly interesting (see Is it possible to extract vertices and lines from this image?), but I found was that method of the comments seemed unreliable when the graph was ...
- 569
14
votes
2
answers
641
views
Is it possible to extract vertices and lines from this image?
I have the following image
Is it possible to extract the lines from this image and then convert those lines to a graph representation? I tried using ImagesLines[] ...
1
vote
0
answers
62
views
How to find the spatial coordinate in a Geotiff that is not recognized by Mathematica as Geotiff [closed]
I am trying to read a geotiff file that is not recognized by Mathematica as a geotiff file.
...
- 317
-3
votes
2
answers
84
views
Color-slicing transformations that detect green wood sorrel leaves within an RGB cube [closed]
Color-slicing transformations that detect green wood sorrel leaves within an RGB cube.
- 27
3
votes
1
answer
83
views
Code to rebuild a patchwork image
I'm trying to rebuild an image which has been cut into strips vertically and horizontally then the ordering of the strips has been rearranged.
For example:
So far I've only been able to come up with ...
- 311
4
votes
2
answers
118
views
How can I import an image, retrieve vertex point values from the shape, and turn that into a list?
I'm using a github repo about turning point data into an array to then create a mirror. The author used a point picker in mathematica, but I want to automate the process. How can I import my image and ...
1
vote
2
answers
118
views
Drawing Axes on top of a Grid of plots
I have a grid of density plots, for example like this toy example
...
- 1,815
0
votes
0
answers
82
views
Semantic Image Segment of grayscale Text Image
How to extract text and pictures from an image file
Consider this grayscale image, how to segment the handwriting part without using Color Information。
Q0:BoundingBox of different patterns:
text, &...
- 8,085
2
votes
2
answers
203
views
Why does GaussianFilter not have a periodic option?
Let us say I have a table:
tab = RandomReal[{-1, 1}, {128, 128}];
I can filter it using GaussianFilter as follows
...
- 21.7k
1
vote
0
answers
68
views
How to separate overlapping portraits in an image?
Assume that I have an image with overlapping portraits. Here is an example of mandala-portraits arranged in a random star-graph:
I want to separate the overlapping portraits and, say, estimate their ...
- 35k
0
votes
0
answers
35
views
1
vote
0
answers
125
views
Separate colours of an image
Since LAB colour space is based on opponent color theory, an image in 'LABColor' is made up of red/green, yellow blue separations.
I am trying to separate an image into its distinct colour components (...
- 7,759
2
votes
1
answer
113
views
How to separate these circle based on their pixels mean intensity?
I have this image I want to separate green circles from yellow circle in two different images whiteout changing the pixel intensity information. I used the mean intensity
...
- 23
3
votes
1
answer
100
views
Image Collage with equal-sized labels
I've been trying to make an image collage, where each image in the collage has a text label in the lower-right corner (or wherever really), where the text is all the same size. Can't seem to make it ...
- 941
8
votes
2
answers
240
views
MorphologicalEulerNumber misbehaving in 3D?
Context
I would like to compute the MorphologicalEulerNumber of 3D GaussianRandomField as a function of height above a given
threshold.
Attempt
I proceed as follows:...
- 21.7k
4
votes
2
answers
132
views
How to get ComponentMeasurements[] from colorized image?
I'm using a software to segment images. Long story short, the output given is an array of integers (range 0-255), which I show here colorized:
I'm supposing that the software avoids representing two ...
- 1,303
6
votes
1
answer
183
views
Getting the area of the gaps in this image of a spider web?
I'm trying to find a way to calculate the area of the gaps in a sample of spider web in a ring. The web strands are very thin and difficult to segment, since there appear to be breaks in the line ...
- 63
1
vote
1
answer
90
views
Adjusting highlights, midtones and shadows in an image
I can adjust the highlights in an image with
...
- 7,759
0
votes
1
answer
73
views
Extract ROIs - Machine learning - References
I want to try to extract ROIs from certain images using machine learning and neural networks , granted I know nothing about this field and it may not be the best way to do this, but the goal is to ...
- 912
0
votes
1
answer
56
views
Extracting an array from an image [closed]
Consider the following array:
array = Partition[Mod[Range[96^2], 250], 96];
We can make an image out of this.
...
- 101
1
vote
1
answer
56
views
5
votes
1
answer
206
views
Noisy and vague shape recognition
Consider the following image:
Imagine I have several images (let's say 40), that look like this one but with slightly different cloud shapes, pixel count intensities and distances between the clouds.
...
- 912
1
vote
0
answers
34
views
Image processing channels in LAB space
I am trying to adjust the curves in LAB space as per screenshot of photoshop command below:
I am using this method:
...
- 7,759
13
votes
1
answer
398
views
Wolfram Neural Net Repository Questions
I am a research scientist in the machine learning team, and mostly involved with the neural net repository. One of the discussions with my group raised these question in my mind, and these might be ...
- 131
11
votes
3
answers
367
views
-1
votes
2
answers
126
views
Sampling a jpg image at a grid of points
I have a 1920x1440 jpg image. It has been binarized. I want to sample the values at an nxm grid of points say 50 points x 40 points. What is the most computationally efficient way to do this? Thanks.
- 141