The tag has no wiki summary.

learn more… | top users | synonyms

2
votes
0answers
87 views

How can I transfer colors from first image into second image? [duplicate]

How can I transfer colors from first image into second image, where every object from the first image should take the same object's color from first image. This images are only an example. this is ...
5
votes
3answers
237 views

Simple image processing very slow

I have compared the speed of some simple image processing routines between Mathematica an IDL. 1. Reading of a grey scale png image of (720,577) pixels: The image is: Mathematica: ...
0
votes
0answers
117 views

Is there any way to connect several images together?

I want to do something like the following, is that possible? As a input I want to provide several images and I want the output to be a single image. Is there any way to do this? I used ...
2
votes
2answers
133 views

Color Transfer from colored image into grayscale image

At first I did this where image is a grayscale image and example is a colored image ...
4
votes
2answers
138 views

Create an image showing max intensities in a set of images?

I would like to use a set of two images with the same color scheme (img1 and img2) to produce a new image (...
6
votes
1answer
137 views

Get 2d corner coordinates / layout using edge detection

I'm new to Mathematica but I found an interesting usage of it: I'm programming a 2D game, with a top-view, where I'd like to have the edge coordinates of the walls. EdgeDetection delivers me quite a ...
1
vote
0answers
90 views

Can not understand the code to plot Fourier Series approximation of the line

I'm reading the CDF file from Making Formulas… for Everything in wolframalpha blog. When I step into In[9] and In[10], I'm fully confused. Who can tell me what does the two functions mean? The ...
4
votes
1answer
78 views

How to translate image points position(row, column) to their coordinate(x,y)?

Here is the code to find image edge and record the morphological connected pixels positions. How to translate the row/col positions to x/y coordinates? ...
6
votes
2answers
211 views

How to use Mathematica to turn a picture into low poly style?

I want to use Mathematica to turn a picture into low poly style. That is, to make the following conversion: Bill to Bill low poly(Using Image Triangulator App). I think the biggest difficulty is how ...
2
votes
1answer
96 views

ContourPlot is slow and unwieldy and generates a large-data graphic [closed]

I'm constructing a single contour showing the points in a plane that satisfy a function. The general form is ContourPlot[f[x, y] == 0, {x, 0, .5}, {y, 0.2, .5}] ...
2
votes
2answers
173 views

Binarizing a matrix

I have an image with a few bright pixels with the remaining ones very dark. The difference is in orders of magnitude. I want to binarize this matrix (corresponding to the image) making all values ...
0
votes
0answers
49 views

Marking certain detected points on an image [duplicate]

I have an image in which I had to detect bifurcation points of vessels. I manage to do that and now I have an image where these bifurcation points are 1 while all others are zero. What I want to is ...
2
votes
1answer
135 views

Moment central of a binary image

I am implementing the Hu set of invariant moments detailed here Hu set of invariant moments. I implemented the moment Image like this: ...
2
votes
2answers
157 views

Set PointSize to pixel size

I have a set of 1million 2D points and I would like to produce an image 200x200 pixels where each point will have the size of a pixel (no more). Additionally each point may repeats several times so I ...
3
votes
0answers
265 views

Masked Image Registration/Alignment/Correlation

I'm trying to register (align) two circular grayscale images using a boolean mask to prevent them simply being aligned on the fixed circular border. There are also small fixed circular regions in the ...
0
votes
1answer
203 views

Calculate the centroid of a group of pixels with the same PixelValuePositions

My question is about how to recognise objects in a image. I would like to recognise objects of the same color. Then I want to calculate the centroid of these objects. I want to apply this calculation ...
4
votes
2answers
333 views

Recognize simple shapes in an image and color them randomly?

I have an image of polygons built from a polar function (see below). I'd like to color each triangle or quadrilateral a random color. Firstly, I'm not sure how to separate the simple shapes. ...
2
votes
1answer
262 views

How to make a big image/dashboard containing various data-graph

I want to make and image/dashborad (to export to PDF) with many VERTICAL bullet graphs gauges. And I can´t make it, in a automatic way. In general, the questions are: QUESTION 1: How to make a ...
4
votes
2answers
178 views

Upsampling matrix by inserting zeros inbetween elements

I want to essentially take an image with $n \times n$ pixels and expand it into a sparse array, spacing out the pixels by a factor $2$ or $3$. Each pixel in the input image occupies one of the corners ...
5
votes
1answer
203 views

measure minimum distance of dots from edge

I want to measure minimal distance of small dots from the edge of an image: Image of bright dots: Edge image ImageAdd looks like following:
-1
votes
2answers
139 views

Save a sequence of images using table with 2D variables [closed]

How can I save a sequence of images with 2D variables using Table. I get a Iterator {r,{-1,-1},{1,1},{0.1,0.1}} does not have appropriate bounds. >> error ...
7
votes
4answers
551 views

Image correlation

I have two images from motor scan, Image1 is shifted by MxN pixels from Image2. How can I find the shift between Image1 and Image2 ? Image -1 Image -2 If we compare the shift between the images ...
3
votes
0answers
289 views

How can I create jpeg images of a given file size?

Cross-posted at Wolfram Community I would like to have a function makeJPG[megabytes_] that generates random jpg images of given file sizes with itf filesize (in megabytes) watermarked on the image ...
19
votes
2answers
704 views

Why does ImageData need four times more memory?

Background We are dealing with very large TIFF image files that are imported, processed and exported using Mathematica 9.0.1. Many of our algorithms only work with an array representation of the ...