Questions on the image processing capabilities implemented in Mathematica.
2
votes
4answers
879 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 ...
5
votes
1answer
199 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 ...
40
votes
3answers
2k 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 ...
6
votes
2answers
399 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 :
...
18
votes
3answers
695 views
How to make a drop-shadow for 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:
...
5
votes
3answers
260 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 ...
12
votes
2answers
175 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, ...
13
votes
2answers
536 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 ...
11
votes
3answers
426 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 ...
12
votes
1answer
227 views
ImageAlign doesn't always work correctly
I've been working with ImageAlign in Mathematica 8 and I'm having trouble getting it working reliably. Perhaps there are some subtleties that I'm not yet aware of? ...
