Questions tagged [image]
Tag for questions about bitmapped graphics, particularly those using the Image function.
1
vote
1answer
55 views
How can I save an image after manipulating it? [closed]
I need to extract a picture from a red square for further transformation over it.
-3
votes
1answer
86 views
How is that distance between images calculated?
The command
ImageDistance[Plot[x^2, {x, 0, 1}, PlotRange -> {0, 1.01}],
Plot[x^2 + 0.01, {x, 0, 1}, PlotRange -> {0, 1.01}]]
produces ...
-1
votes
0answers
105 views
How can I write code to generate data for Shepp-Logan phantom? [duplicate]
I want to generate the Shepp-Logan phantom data in Mathematica (I use version 11) before using it to build my phantom. I am hoping to have more control on the attenuation coefficient (please refer to ...
0
votes
0answers
97 views
Remove background image and redraw lines in black
I do not know if the title is correct.
The image that I upload has liked me a lot because of the characteristic that no matter the angle it seems that it is looking at you, you could indicate me how ...
4
votes
3answers
212 views
Converting a list of colors into an image
I want to manipulate colors, and merge the resulting vector and rasterize it into an image, controlling the resolution of the pixel.
E.g. I tried to:
But what I would like to have is an image of 3 ...
7
votes
1answer
92 views
Captcha text morphing effect
There have been many posts about generating and cracking Captchas. However, I have never seen a post or answer concerning one the more recent versions of re-captcha images - a "word morphing effect" ...
1
vote
0answers
44 views
Image to coordinate system
May I kindly ask you to teach me how to align the symmetry axis (in blue) of the attached picture along the Ox and/or Oy axis. The axis of symmetry is slightly off (rotated to the right).
In other ...
2
votes
3answers
66 views
Text position inside jpeg file
I tried the following line in order to write a text in my image.
p1bis = Labeled[p1, Text[Style["(8)", FontSize -> 52]], {{Top, Left}}]
I get the following ...
2
votes
1answer
54 views
Drawing Circle using Image[Graphics[]] - incorrect coordinates
I want to draw a circle with center {x,y} in an image.
I use the following code:
...
1
vote
1answer
37 views
Programmatic access to Export options for filetype
For specific filetypes, e.g JPG, GIF, etc. I would like to get a list of available options for use in Import and Export.
Unfortunately, the obvious thing doesn’t work:
...
0
votes
0answers
86 views
How do I get a beautiful image overlay from data and a model function?
I have a set of experimental data that I wish to make into a density plot. Then I have to overlay an image of a model function f(x, y, z) = Sin(x/z)Sin(y) on the ...
2
votes
2answers
49 views
Text beside image
I have a lot of text in my Notebook (Format>Style>Text), and I would like to have the full width text, then insert an image on the left, and have the text continue down the right side of the image, ...
8
votes
2answers
415 views
How to convert a 4-channel image to 3-channel image in an elegant way?
I have a 4-channel image (RGBA). I want to reduce its channel count from 4 to 3.
The method I am using currently is to Right click and Save as a .png file. After ...
2
votes
0answers
63 views
Help find rectangles with numbers [closed]
I have this picture
1)
Result must be like that
2)
. But I can achieve it only if have good numbers with picture like that 3)
With first image I have result:
4)
I can't recognize numbers with ...
2
votes
1answer
28 views
ColorFunction in SphericalPlot3D fails with ImageValue
I would like to texture and deform a sphere with with images using various mapping functions between x,y and phi,theta. I figure I should start with $f(phi,theta)=(x,y)$ as a test case. However, I ...
22
votes
3answers
978 views
How can I make a graph network from image of granular packing?
I have an image from experimental data of granular packing. I need to characterize the packing as a network. The network consist of node (center of granular particle) and edge. Two node are connected ...
2
votes
0answers
66 views
How to do your own Wolfram Function-of-the-Day style GIF?
Anyone know how Wolfram tweets out GIFs of a notebook running some code like this one?
https://twitter.com/WolframResearch/status/1083739334879182848
It's a lovely way to show how to build/iterate ...
0
votes
0answers
30 views
interface problem for image recognition
I made the following code that should recognize the image imported from the pc. If I do it for the first time it's fine, but if I load a second image it leaves me the name of the previous one. You ...
0
votes
0answers
14 views
Import all images of a folder on mathematica [duplicate]
How can I import all the images of a folder on mathematica specifying the category of such images?
For example, if I have a folder with images representing the night how do I import them and specify ...
2
votes
1answer
55 views
Importing a raw image
I have raw images that I can import and view with ImageJ. They are the output of a program which I don't have the source code for, so I'm stuck with the output format.
They are imported as follows ...
5
votes
4answers
470 views
Fill in an incomplete outline of an image
I have an outline which I have extracted from an image, which may well not entirely closed, for instance:
I now want to fill the inside of this, as another image, using the convex hull if it is not ...
2
votes
0answers
27 views
Graphic scaling of neural network SummaryGraphics
Same funky scaling occurs when dragging the SummaryGraphics with the mouse; so, the issue is in the graphics itself not in the ...
2
votes
1answer
95 views
How can one get the axis of symmetry of the following egg profile [closed]
This is the binary version of the profile of an egg. Would you be so kind and let me know how to get the axis of symmetry of this profile. Thank you!
5
votes
1answer
80 views
Blend modes for composing images?
I'm looking for a way to combine two images with standard image blending methods like Darken, Color Burn, Color Dodge, Soft Light. Is there a way to achieve these with ...
0
votes
1answer
73 views
Best solution to insert text at defined position into image
What is the best solution to insert text at defined poition into image?
I saw this question/answer but it does not help me for my examples below.
I tried the following and find some strange ...
13
votes
3answers
299 views
Deleting noisy data from a plot (manually) and export the best remaining data
I have the following temperature time-series. As you can see it contains very very noisy points in some periods (Fig.A). I tried to approach the best data(the black one in the center) based on the ...
3
votes
0answers
85 views
Image Processing: Detecting certain edge features over varying contrasts
Images and description-
• The images are obtained from the frames of a video (>1000 images)
• As shown, there are contrast variations between the images
• The bubble shifts horizontally ...
3
votes
3answers
351 views
How to calculate surface of specific color?
I have black-and white picture like this
Can anyone tell me is it possible to calculate surface that black color occupies in this picture, so I know what's the percentage that black color has in ...
-1
votes
2answers
86 views
4
votes
1answer
95 views
3
votes
1answer
105 views
How to properly copy an image from Mathematica?
I want to copy an image in mathematica to use in another program.
E.g:
im = ExampleData[{"TestImage", "House"}]
When I evaluate ...
1
vote
1answer
63 views
Confusion in the position of image coordinates
I am struggling to work out how image coordinates are calculated and how to be consistent when finding particular points in an image using these coordinates for further analysis. I don't think it is ...
12
votes
2answers
136 views
How to extract Bitmap image from SQL records?
I'm trying to extract image from records of the MSSQL demo database NorthWind with this codes,
...
2
votes
0answers
37 views
issue with ImageEffect; EdgeStylization
I have a issue with ImageEffect/EdgeStylization. After importing a .jpg-file like
test = Import["C:\\........\\DSCN0018_v1.jpg"]
The result is:
Then I take a ...
1
vote
0answers
31 views
ReplaceAll does nothing with the rgb values of a picture [closed]
In the book "Programming with Mathematica: An Introduction" at the beginning of the chapter on Patterns and rules an example is given where the colors of an image are transformed according to
...
5
votes
2answers
331 views
How do I dynamically draw an image?
Suppose I have some two dimensional list. For example:
list = Partition[Range[0, 48], 7];
And I have some function that assigns a colour to each entry of the ...
2
votes
1answer
45 views
Mathematica exporting issues with Row[]
I've had this issue for quite awhile - and it's quite frustrating. When publishing papers, we try to get all of our figures in .pdf for obvious reasons. Usually, Mathematica exports to .pdf just fine, ...
2
votes
0answers
46 views
Smoothing a image while retaining the edges
In my previous post here it is mentioned that using ImageResize before ImageGraphics will increase image quality of the final ...
0
votes
0answers
54 views
Random points from an image using a BernoulliDistribution
I am a Mathematica newbie. I need to sample random points from an image which I have stored in a variable img as:
...
0
votes
0answers
27 views
save each picture individually to individual jpg file (export image) [duplicate]
This piece of code returns 10 pictures all at once as output. However, I would like to save each mandala picture file separately. So design one will have picture1.jpg, design two will have picture2....
0
votes
0answers
36 views
Scraping Images that are Directly Embedded in a Webpage or Dynamic?
I need to scrape URLs for photo albums like Flickr and Facebook for images from a certain event.
I'm trying to use Import["link", "Images"], as shown at
https://...
2
votes
0answers
54 views
Suppressing non-deterministic behavior in Image
The following issue is experienced in Mathematica 11.3 on Linux (debian 9) but I am pretty sure it was already present in version 10 on Linux.
The expression
...
1
vote
1answer
59 views
Adding an Image at a specific place on an existing image
I have created the following PDF: Basically an image, with a description underneath and a space to take some personal notes:
...
3
votes
3answers
93 views
Why is the color changed after applying ImageData?
I have an image square.png as below:-
I imported the image as ImageSquare, and then applied ...
2
votes
0answers
43 views
Identifying overlapping incomplete squares in image
I am trying to align my device and markers automatically using positioners driven by Mathematica. The camera feed looks like this:
The device is the black square with gold electrodes. The markers are ...
1
vote
1answer
27 views
`PlotRangePadding -> 0` still leaves 1 pixel border
The following should create a 50x50 image named /tmp/nopad.gif with mostly random colors and a red border:
...
7
votes
1answer
233 views
How to recreate this 3D plot?
In other languages, one can make a FeaturePlot3D-esque graphics where the inset images look realistically three dimensional. Meaning that they are smaller when farther away (and also hazier).
So how ...
2
votes
0answers
76 views
How to achieve this fractal image transformation?
The app MirrorLab on Android has a very interesting Julia Effect, and I'd like to recreate this effect in Mathematica. Here are some examples of input images and their outputs:
...
3
votes
2answers
72 views
Visualizing Color Values On Original Image
I have an image and I would like to retrieve all color values of pixels which are located along stribes:
So what I do, is the following:
I import the image from the web
I get the image dimensions (w,...
2
votes
2answers
116 views
How to prerender / rasterize a graphic without losing location information
I have a Graphics object for a detailed plot that has too many points and regions in it to be quickly rendered, which I want to use as a background for a ...
