Questions tagged [image]
Tag for questions about bitmapped graphics, particularly those using the Image function.
607
questions
0
votes
0answers
35 views
Is there any ways to accelerate Matrix Dot Multiplication?
I'm trying to code moment computing, which needs massive Matrix Dot Multiplication.
My current code is below.
...
0
votes
1answer
35 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.
...
5
votes
2answers
148 views
Extract individual white parts of binarized image
Suppose we have an image, like so:
and I managed to create its MorphologicalGraph by using
...
-1
votes
0answers
54 views
How to determine the average width between white pixels in an image?
I am still trying to have some improvements to this problem.
What I have done is:
Take the original image.
Apply ImageCrop.
Apply ...
5
votes
1answer
128 views
3D ImageCooccurrence
I'd like to compute ImageCooccurence for an Image3D object. Mathematica advertises that "Now essentially any operation ...
8
votes
1answer
440 views
Rendering PNG images to spline curves
I found something interesting on this page (Generic contour smoothing with shading) that could help me improve my images. Unfortunately, they can only be used with graphics generated by the software ...
2
votes
0answers
68 views
Mathematica 12.1 trial version, very slow to evaluate a property in multiple pictures
I am a new mathematica user.
I am using the following code to measure the internal rectangle width in some images. When I run mathematica for $1$ image, it takes a short time. Also, it works and it ...
0
votes
0answers
55 views
$1)$ Combining codes. $2)$ Editing them. $3)$ Evaluating the outputs
I asked a question here. kglr answer was GOOD because that measurement is what I meant exactly.
Due to my knowledge in mathematica (I am a $2$-days user), I have some problems (I believe that users ...
12
votes
2answers
354 views
Detecting two (almost) vertical lines, and find the gap between them in (pxl)
I have no knowledge in mathematica, python, and other great softwares.
I saw the following picture in a website;
Where a software detects objects (like bus) and tells about its height or width or ...
2
votes
0answers
17 views
Problems with ImageResize using Mathematica Online (different results than Mathematica desktop .nb)
I originally created a package (.m file) which handled figure formatting. This package was read into my desktop notebook file. In the code block below, I use ImageResize[image,width] to resize an ...
0
votes
1answer
39 views
insert or remove a photo from a notebook on demand
I would like a "button" which I could "click on" that would on first click insert a specific photo from a windows file and then, on second click, remove the photo. It could also be two buttons. Or ...
8
votes
1answer
193 views
Better performance for shortest path in an Image
I would like to find the shortest path in an image from one pixel to another. If the image is grayscale, the distance between two pixels could be Abs[p1 - p2], ...
0
votes
1answer
35 views
How to plot a greyscale image as a 3D plot for larger images?
I was following the post:
Display grayscale image as 3d plot
But the method failed for any image of substantial size (in my case when the data size is of order 3072x4096). Ram usage on my machine ...
0
votes
0answers
36 views
Construct UI for image
I am trying to build the User interface, whereby when binarize is clicked, it gives its slider and its respective MeanIntensity and StandardDeviation.
The same for EdgeDetect and MorpologicalBinarize.
...
18
votes
4answers
379 views
Find best region to put text onto image
Given an image upon which you want to inset text, the question arises:
What is the best sub-region to place text?
For example, given a background image I want to find the rectangle in the image (...
0
votes
1answer
41 views
Rasterize resets the PlotRange?
I used in my calculations zome polynomials evaluated on a grid with Array command and characteristic functions of some polygons, which I evaluated using ...
2
votes
1answer
42 views
How to get center points of an images with different resolution
I have an images of particles and I want to get the center point coordinates for each particle. I can get the coordinates with other imaging tools, but since my calculations are in mathematica i want ...
1
vote
1answer
48 views
Resizing Imported GIF Image
I have a gif image that I am trying to import into the Mathematica Notebook, and I found the accepted answer of this question very useful: Is it possible to insert an animated image into Mathematica ...
2
votes
0answers
80 views
Mathematica 12.1 breaks exporting to postscript - workaround?
If you uncomment the ColorFunction in the code below, the resulting PS file is 200kb (compared to 32kb in 12.0) and is rejected by applications such as Scientific ...
3
votes
1answer
91 views
Rasterize issue with ListDensityPlot in 12.1
I have upgraded to 12.1 (on OSX Catalina 10.15.3) and am noticing some odd behaviour with Rasterize.
If I use a high number of rasters when rasterising a ...
2
votes
1answer
69 views
How to know what underlying algorithm mathematica function is using? [closed]
For example Blur, the documentation doesn't seem to tell what is the algorithm it is using (https://reference.wolfram.com/language/ref/Blur.html). Is there any ...
0
votes
0answers
51 views
Use Mathematica to draw a tensor-like network
What are the Mathematica ways to draw this seemly delicate figure? Such that we can output a PDF file in the end.
1
vote
1answer
58 views
Complete contours (outline) from a image
I want to find the contours of (parts) image and sent the output to a laser cutter. For example, take this image:
I use this code:
...
7
votes
1answer
124 views
How to detect rectangles with certain colors in an image?
I'd like to find the red bordered rectangles in this image:
Here are my example images:
...
8
votes
0answers
167 views
Guide to capturing the complete image of given urls?
I'm trying to use WebImage[] to capture the complete image of a website (yes, it might be very tall). I seem to be having some issues with it:
How to attempt to capture a complete image of the ...
1
vote
0answers
45 views
Mathematica for automatic image processing and quantification [closed]
I've been working on image analysis pipeline that involves a set of batch processing macros in ImageJ (for image segmentation) and data processing in Excel (VBA). I've got the process run in 4-5 ...
3
votes
1answer
90 views
Describe overlapping parts of an image with the fewest points
Lets say I have an image composed of 19x19 pixel red squares, each of which represents a single point (i.e. a plotmarker). I wish to obtain an estimate for the actual point each square represents, ...
2
votes
1answer
96 views
Convert Plot to Base64 [closed]
My goal is to get a Base64 string directly from a plot (or any Graphics object) in Mathematica such that, when using a Base64 decoder online, such as this one, I ...
5
votes
3answers
185 views
Symmetric icons
I'm trying to replicate "symmetric icons" from this book:
https://www.amazon.com/Symmetry-Chaos-Search-Pattern-Mathematics/dp/0898716721
Here is what I have so far:
...
6
votes
1answer
116 views
Using images as points in `ListPlot`
I am trying to make a ListPlot with a bunch of points, each of which I want represented with a distinct image (e.g. *.png). I'...
3
votes
1answer
110 views
How to interactively draw a bitmap with mouse?
I cannot find the MNIST dynamic activation example I strongly believe I have seen in the documentation.
What would be the most efficient way to
draw a black &...
1
vote
1answer
84 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, ...
7
votes
1answer
184 views
How to import a ByteArray from GenerateHTTPResponse?
Without GenerateHTTPResponse the import works as expected.
ba = ExportByteArray[Plot[x, {x, 0, 1}], "PNG"];
ImportByteArray[ba]
...
3
votes
1answer
47 views
Why do ColorSeparate and ColorConvert give slightly different output?
Consider the following test code:
...
7
votes
1answer
277 views
Decode Image from Base64
From a web API, I have a bunch of realllyyy long strings that look like this:
data:image/jpeg;base64,(...)
Sites like this will decode these strings no problem, ...
4
votes
0answers
84 views
Passing an image to Kernel via NETLink
I have created a specialized image analysis method in Mathematica that takes an image and returns a marked up image with some detection output. In order to allow others to feed images into my ...
1
vote
1answer
73 views
How to put the plot together?
I have a very long code which at the end, I get two plot (main energy plot and energy bar attached pictures). I need these two plots next to each other (for paper). Problem is I can not save the ...
1
vote
1answer
100 views
How to download user faves on Flickr?
The Flickr service API doesn’t seem to have the getfavorites() request implemented. Is there an good way to do this with WebExecute?
Code to get started with:
For ...
14
votes
1answer
280 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):...
7
votes
1answer
788 views
web scraping images
I am trying to load player profile pictures from the following page:
https://www.transfermarkt.com/manchester-united/startseite/verein/985/saison_id/2006#
I use the following code:
...
1
vote
1answer
53 views
How reduce resolution of a graph during export?
Suppose I have a density plot which I want to export in EPS format. But when tried using command, Export["/home/1.eps", %263, "EPS"] , the exported image has very large size (~100MB). How can I ...
2
votes
2answers
94 views
6
votes
1answer
110 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 ...
1
vote
2answers
53 views
how i can create 2d pixels image
Is it possible to create an image with a defined number of pixels? For example, create a circle through the equation x ^ 2 + y ^ 2 <= 200 ^ 2 in a 400x400 pp image and define different colors for ...
1
vote
1answer
79 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
votes
4answers
213 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 ...
3
votes
0answers
51 views
Uploading an image to Wolfram with “png” or “jpg” suffix [closed]
Using CloudExport one can get images of Wolfram objects into the cloud:
Problem: Those urls don't come with a *.png or <...
3
votes
1answer
97 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.
...
5
votes
1answer
78 views
Find image dimensions without importing the full image?
Is there a way to find the ImageDimensions of an image file without Import'ing each one? The reason being that I have a ...
1
vote
1answer
50 views
Comma separated images for .gif creation
I recently created a key frame animation using Mandelbulber 2.18-1. Each .png image was placed in a folder with known location. I then dragged all the images and dropped them into a Mathematica ...
