# Questions tagged [image-processing]

Questions on the image processing capabilities implemented in Mathematica.

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### Image Shadow Removal in Mathematica

The task is: Image shadow removal is an important topic in image processing. If you feel curious about it, you may take a look here, or just google for it image shadow removal There are also a few ...
277 views

### How do I slice an image of size “width × height” in n² pieces of size “width / n × height / n”?

Background: What I want is to make a jigsaw from an image. (A simple one where the pieces are polygons.) I have the following strategy in mind. Create a set of polygons and assign images (or just the ...
509 views

### How can I enhance ImageCompose to blend multiple layers?

Blend modes (or Mixing modes) in digital image editing are used to determine how two layers are blended into each other. Version 8 has functionality to perform binary and basic alpha blending but ...
204 views

### How can I crop manipulator from a plot

I wanted to know how can I crop a Manipulator from a plot. the code for plot is ...
952 views

### How to render a 3D tubular graphics from a 2D image path

Question: Is it possible to create a tubular 3D image like Extruding along a path using "Tube" function in mathematica for following images? Image (1) Image (2) Thanks I have been playing ...
174 views

### How to estimate time series from a plot? [duplicate]

Possible Duplicate: Recovering data points from an image Suppose you have a colored plot of several time series (say, from a paper), but not the raw data. How would you estimate the series, which ...
1k views

### Efficiently exporting many images as a video

I have many .gif images and I would like to export them as a single video file (I prefer .mov, but any video format is fine). But what if I have several tens of megabytes of .gif images? Is it ...
3k views

### Finding the area, algebraic curve and jaggedness of an arbitrary shape

I start with a photograph of a shape (physically made by the flow of a liquid into another), of which I can extract the border, manually or using Mathematica's feature detect feature : Using the ...
2k views

### Rotating perspective of an image in the z axis

A purely recreational question, but one I hoped the community would find interesting enough to suggest a way to approach it. Let me preface this question with the admission that I have done nothing ...
283 views

### How to record the stream of data (PixelPosition) dynamically?

I need to trace the moving of an object and get the coordinates of such movement. The set of coordinates will be used for the subsequent evaluation and analysis. I can easy get the current real-time ...
827 views

### Computing the distance between two curves obtained from image data?

I've got some image data that I've binarized. The image contains two curves, from which I'd like to compute the distance between (eventually computing an average radius for each point in the picture)....
1k views

### What's the difference between EdgeDetect and MorphologicalPerimeter (for a white background)?

I am trying to understand the differences between EdgeDetect and MorphologicalPerimeter (while researching this other question). ...
656 views

### How can I visualize features found in an image?

I am using Mathematica to explore the face detection feature of Core Image on Mac OS X Lion. To do this I have an Objective-C program which captures images from the iSight camera, runs face detection ...
914 views

### How to reduce the memory necessary for the image? [duplicate]

Possible Duplicate: Exporting graphics to PDF - huge file I have a figure that is created to use in a paper. Here it is: ...
2k views

### Copying an image from the clipboard, modifying it and returning it to the clipboard

I have a Mathematica script to help me copy images from PDFs and then make the (presumably white or nearly white) background transparent. Typically, I am looking at the PDF in Adobe Acrobat and I ...
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 ...
845 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: ...
845 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

### 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 ...
462 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 ...
990 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://...
724 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. ...
300 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, ...
1k views

### Image levels: how to alter 'exposure' of dark and light areas?

I was working with some less than ideal photographs, and wanted to adjust them before continuing. I wanted to raise the levels of the very dark areas and lower the levels of the very light areas. I ...