Questions on the image processing capabilities implemented in Mathematica.

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7
votes
0answers
287 views

Visualization of traces of moving objects

An example movie which is made with the listed mathematica code below shows traces of moving objects: https://youtu.be/8jN2uuSHCEg (Melting ...) http://youtu.be/5ET62846C-I (Crystallisation ...) ...
3
votes
2answers
147 views

Image smoothing with own smoothing function

I have thousands images similar to the following one: This image was produced with the following color table: ...
2
votes
1answer
156 views

Better way to binarize an image

I have an image: pic = Import[ "http://note.youdao.com/yws/public/resource/\ 2c5a562224240edcf1631fcd39810f56/55FA538207424C0A98AB548724994AE1"] that I ...
14
votes
2answers
560 views

Trainable WEKA segmentation of images

Is there a Mathematica equivalent of Trainable WEKA Segmentation as implemented in Fiji, the image processing software? A Google search did not return any relevant links. I attach the original image ...
7
votes
1answer
570 views

Calculation of 2D FFT for an image

I am trying to obtain 2D FFT of an image. From the 2D FFT, I wish to calculate the amplitude of the FFT averaged over a circle vs the distance in pixels by varying the radius of the pixels which is ...
6
votes
4answers
889 views

Finding number of pixels with certain RGB color in an image

I have the following image: To determine the number of black pixels (nBlackPixels) I use: ...
2
votes
0answers
102 views

Identify and measure single bubble radius in series of images (TIFF)

I aim to make use of Mathematica's image processing capabilities to measure the radius of bubbles in consecutive images taken with a high-speed camera. After searching through this website I have ...
12
votes
2answers
789 views

How to fill the space outside of an image after rotating it

I want to rotate this image by -50 degrees, and then fill up the black space around the rotated image with a bluish color. I can't find any documentation/answers that suggest how to do it. (Sorry ...
10
votes
3answers
387 views

Best method to find variation in width along the image of a slit?

EDIT: Solutions by @Alexey Popkov and @Vitaliy Kaurov are very intuitive and both can be used to find a solution for the task. I have a slit of 15-18 microns by 1 mm projected with magnified 4X onto ...
5
votes
2answers
161 views

Speed up image coloring with ReplaceImageValue

I have about 200000 rgb-images of such format (2160*577 pixels): I want to colorize in each image some parts in white color: ...
3
votes
0answers
202 views

adaptive histogram equalization

There is an interesting algorithm called contrast enhanced adaptive histogram equalization that does histogram equalization on small segments of an image (and then pastes them back together). I know ...
19
votes
2answers
480 views

Get measurements of touching particles in an image

I have a picture of glass spheres. I want to calculate different properties of these spheres such as circularity, size, and count. I have managed to fill the white centers of the particles to ...
1
vote
0answers
39 views

Using an arbitrary area bounded by lines for PDEs?

I have a set of lines I pulled from an image that make a closed loop, pretend it's a unit square for reference. Is there a way to use such an arbitrary region for solving PDEs, and is there a way to ...
1
vote
0answers
115 views

Extract peaks from image

EDIT: I've managed to solve the problem by using "Get Coordinates" on a couple of points and then figuring out the affine mapping by using the values they're supposed to be at, and applying that ...
0
votes
1answer
156 views

What kind of algorithm can be used to map image coordinates to cylinder coordinates

I plan to flatten an images on curved surface(eg: jar or door knob) and I found a pretty good post which helps me a lot :)(link below). However, I still confuse on how to map image coordinate to ...
0
votes
0answers
72 views

Pulling the boundaries from a Solidworks Profile in Mathematica

I'm currently trying to take a 2d profile generated in SolidWorks and use mathematica to analyze it. I need to pull lines that represent the boundaries of the shape from an image of the shape. . My ...
11
votes
3answers
529 views

How to speed up Colorize

I have a list of about 500 images similar to the following: A = Import["http://i.stack.imgur.com/1bV4O.png"] ...
2
votes
0answers
94 views

ImageData to Image to ImageData, in LABColor [closed]

Given an $m\times n$ image $G1$, I'm trying to: Extract the $mn$ pixels of $G1$ as an $n\times m$ matrix $M1$ of triples, where each triple represents the color in LAB space. Turn $M1$ into an ...
7
votes
1answer
283 views

Using ImageIdentify

How long does it take ImageIdentify to give an answer for one image? Also, I suppose using it requires an Internet connection with Wolfram servers. Is that correct?
3
votes
1answer
316 views

Compute a hessian matrix on a image?

Is it possible for Mathmatica to load a gray image and apply a hessian matrix on it?... It used image processing to find good features.
4
votes
0answers
139 views

Mapping Images in Parisian metro stations

One particular aspect of some Parisian metro stations is that stations' walls are curved, even in the sides where one would place advertising posters. Here is a picture of one such station: I was ...
1
vote
0answers
123 views

How to import all the images in a folder? [closed]

the source code is ...
2
votes
1answer
128 views

How to construct a kernel from a function?

I would like to convolve an image with a mathematical function. I understand that I need to have the mathematical function in a matrix form. How can I build it? Thanks
5
votes
1answer
225 views

Aligning transformed images to form a mosaic

I'm trying to align and stitch together these images to form a mosaic: It's a similar problem as this one: How to keep the non-overlapping parts when aligning images? However, (and I may not ...
6
votes
1answer
176 views

Video stabilization: extracting the transformation rules used by ImageAlign

Imagine that I have a real life video, with all the artefacts coming from real life, and also from video compression, etc, and that I can edit this video, with filters and cropping, in such a way that ...
3
votes
2answers
55 views

Undesired resizing with ImageMultiply and Masking

I want to systematically measure image intensity around each of the points in this 256x256 image. i0: I already have centroid locating code to figure out the centers of each of these points. To ...