# Questions tagged [image-processing]

Questions on the image processing capabilities implemented in Mathematica.

1,216 questions
1k views

### Selective blurring of areas of image to make seamless tiles

I'm trying to make seamless tiles - images that can be repeated on a grid without it being obvious where the joins are. So far, I've followed the classic strategy of getting the edges working ...
829 views

### Adding controls for multiple functions in Manipulate

I am learning Mathematica and the Image Processing functions. I have the following Manipulate procedure which works fine: ...
801 views

### Measure a DensityHistogram[] pair similarity

I study human vision and more specifically eye-movements. "If we display 2 symmetrical patterns (20 min one after the other), will our gaze distribution be symmetric is my research question." The 2 ...
2k views

### What is the fastest way to locate an image inside a larger image?

let b = let c = How to do: find[c,b] that returns the bounding box of c in b? Notes ...
1k views

### Symmetrical image transformation for a kaleidoscope-type image

I've been trying to write a little kaleidoscope-type manipulate, using images rather than graphics, and using ImageTransformation as a way in. However, I'm starting ...
3k views

### How can I extract the data from an image and process it pixel by pixel?

For example, to change the color of each pixel to the mean color of the three channels, I tried i = ExampleData[{"TestImage", "Lena"}]; Mean[i] but it just ...
436 views

### How to determine edgeweights from width of skeleton using MorphologicalGraph (or workaround)?

Background I'm trying to create a workaround for what seems to be a bug in MMA's graph functions related to edge weights: SO: How to Label Graph Edges with their weights According to MMA's ...
11k views

### Recovering data points from an image

Unfortunately, some data can only be obtained in picture form (Japanese publications anyone?). Since this cannot be worked with, it has to be converted to a dataset that can; I was wondering whether ...
935 views

### Fit an image within a Rectangle [] in Graphics

Based on the following Code (yet the white text in the image is added with PPT), I would like to have an image fit within one of the rectangle. For Example the image from there : http://...
4k views

### How to make a drop-shadow for a Graphics3D objects?

What's the best way to make a drop shadow for a 3D object? image = Graphics3D[Sphere[], Boxed -> False] I can get a blurry black outline of this: ...
670 views

### Tile image on specific location without space between them [duplicate]

Possible Duplicate: How to combine images with the same dimensions in a grid? I would like to arrange images without any space between their edges as each piece is made to connect with others. ...
3k views

### Character edge finding

The following line of code finds the edge of a character: ...
287 views

### Tuning ParallelMap when IO and computationally bound

I'm currently doing work on processing a number of images taken frame-by-frame from a video. As a result, I have a directory of around 16K PNG images that at most ~300K. That said, I have a routine, ...
3k views

### How to combine images with the same dimensions in a grid?

I have the following images, both 480 x 270 pixels: I'd like to stitch them side by side in a 960 x 270 pixel image like so (scaled down): So far, I've been using ...