# Tagged Questions

Tag for questions about bitmapped graphics, particularly those using the Image function.

98 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 \$m\...
153 views

### Incorporating photos into a Mathematica-made web page

I use Mathematica to make my web page. I make various .nb files, usually with photos, and then use an Export command to convert the .nb file to an .html file with ...
366 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.
689 views

### Generating uniform random points over a binary image

So I recently read this excellent post about generating random points over arbitrary regions. I hope Wolfram eventually builds that functionality into Mathematica's Random functions. I want to do this ...
125 views

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

the source code is ...
137 views

### Graphics3D and Bit Depth of Rendering

A year or so ago, I sent this question to WRI (nb- a former employer of mine) and, as happens with bug-reports-that-arent-bug-reports, it was swallowed into the black hole that is Chambanna. So- I ...
84 views

### How to trim the image after rotating?

Want to rotate this image and then trim it. consider image=R6UgC.jpg; Imrot=Rotate[image, 2 Degree]; ImageTrim[Imrot, {{560, 400}, {900, 900}}] getting error ...
326 views

### How to scrape image search engines?

I'd like to download highest resolution images possible from the search results like these: ...
131 views

### Help in evidencing a region (circular) of a .tiff image and cropping all the rest of the image

I'm asking for the community help since I have problems in cropping an image. I'm having LEED images which are 576*720p, which are made by a big black region at which middle I have the image I'm ...
194 views

### Make continuous 3D tube out of 2D image (Mathematica 8) [duplicate]

I have the following image with transparency: which I want to paste repeatedly into a 3D space to make it like a tube, something like this (but denser): I tried using the code from here but it ...
144 views

### Label point on plot with image instead of text [closed]

I can use this code to label my points with text. ...
132 views

### How to add a static JPEG into a Manipulate without slowing it down

I´m trying to add an image from a book into a Manipulate but it makes the Manipulate update very, very slowly. So much so that ...
99 views

### How do I color an Image generated from data such that one range of values is one color gradient and the others another color gradient [closed]

I can generate a Gray scale Image from some data that I collect. However I am trying to figure out how to generate the image with two color gradients or color scales based on the value. For example ...
256 views

### How to keep the non-overlapping parts when aligning images?

I would like to stitch together a pair of images. For example: ...
370 views

### Creating an image grid that displays a full-size image when a thumbnail in the grid is clicked on

I am working on some teaching resources and pulled a whole bunch of images off the internet to illustrate the idea of "angle". I can get Mathematica to import them and display them in a nice "collage"...
224 views

### Decompose Point-Spread Function into Seidel Aberration/Zernike Polynomials

I have measured the point spread function (PSF of a microscope) and I want to quantify it. For that purpose I want to fit my PSF data to the primary Seidel optical aberrations (or Zernike Polynomials, ...
115 views

### How to save a bounding box on an image?

It's easy to save the coordinates of individual points, but for the life of me I can't seem to access the box's position and dimensions: {top, left, width, height}. How can I achieve this?
192 views

### Generating b/w bitmaps from a binary sequence

I would like to make a bitmap that visually represents a binary sequence, something like this: Where for example the 1's become a black pixel and the 0's a white one. I have never done something ...
142 views

### How to find soccer balls in an image? [closed]

I have 10k images and I need automatically remove only soccer balls, excluding other types (volleyballs, baseballs, etc...). I'd like to use computer vision methods of V10 to find their masks and ...
286 views

### How to label my training images?

I'm switching over Matlab, but I have a problem. Matlab has a GUI tool called the "Training Image Labeler" (shown below) that I use all the time to label my training data for my computer vision ...
277 views

### Calculating displacement for a circular disc

I have to calculate the difference in diameter of two concentric circles. The image is obtained from an experiment and the data looks like this. The length required is the value of l as marked in ...
199 views

### Efficient image stacking

I have a list of lists of images that I would like to stack and create mean images for each list of images. Images are .jpg files 2592x1944 pixels large. Each list ...
259 views

### How do I change the size of an imported picture in an animation?

My code right now plots a function, and animates an image moving along the curve of the function. I want to reduce the size of the image for this animation but I can't figure out how. If I try to ...
163 views

### How do I apply a ColorDataFunction[] to a grayscale image? [duplicate]

Suppose I have a 2D array im of real values between 0 and 1, representing a grayscale image. I can turn im into an image very ...
66 views

### How to export a PNG with an alpha channel? [duplicate]

Is "RGBA" not a supported colorspace? Export["test.png", RandomImage[1, {100, 100}], ColorSpace -> "RGBA"]
254 views

### HOWTO encode/decode large chunks of Mathematica code/results e.g. for posting on sites?

At times, we as questioners would like to post huge Mathematica-expressions to websites (e.g. mathematica.stackexchange.com), or have an easy way to get such code from a site. Above a certain size, <...
105 views

### How can I run my API on an image?

I've built an API that takes a url of an image as an argument. Using Import[] I can easily call my API on any url and get the results... but I need to run it on an ...
75 views

### How can I union a set of images? [closed]

What is the best way to do image de-duplication in Mathematica. I've used a tool called Visipics in the past, which works well, but I need to do this in MMA. Basically the function I'm looking for, ...
240 views

### Trace one point's coordinate values in sequentially images

I am a research student in a university. I think I need some help. I used a video camera to monitor the vibration of a plank. Then I should calculate the amplitude and frequency of the vibration ...
270 views

### Inconsistent image sizing with Grid and Row?

Can anyone explain why Row and Grid don't size the image correctly and consistently to 300 ...
261 views

### Rendering a 3D volume with Image3D

I have 2D JPEG images, of 1024 x 1024 pixels, corresponding to a 500 x 500 square micron section. These images are taken from slices of tissue, each slice seperated by 10 microns. I've been trying to ...
349 views

The new function ServiceExecute seems to suggest the ability to download images containing a specific hashtags. Can anyone get this to work?
83 views

### Get the path of the Image in Mathematica

When copying the Image from the hard drive to the Mathematica notebook, what can I do to have the path of the Image? I tried Imort[img] // Path where ...
112 views

### How to convert a coloured image according to the colorfunction I defined?

I got an image from a website which follows the colorfunction "Rainbow", e.g. ...
471 views

### How can I detect if an image is in or out of focus?

I need to filter out bad (blurry or ) images from a set, with some sort of blur detector.
199 views

### How can you resize all the images in a notebook section?

I've pasted a large number of photos and they are too big which makes scrolling hard. Is there a way to automatically have Mathematica size them to 10% or something reasonable without have to click on ...
138 views

### How to get the SIFT features of an image?

According to the documentation, the function KeyPoints[] computes features only using SURF, but what about SIFT or FAST features?
103 views

### How do I use an image as a ChartLabel?

I'm trying to use an image as a ChartLabel and I'm getting strange results. Here is a bar chart, with labels, that looks ok: But when I try to replace the "A" ...
55 views

### Removing Perspective Distortion [duplicate]

Below is my input: I would like to remove perspective distortion from the image. Expected output below:
38 views

### coordinate system problem [duplicate]

I had an issue about the coordinate system of mathematica. I have a {800,600} image acquired with a camera. The projection matrix P of the camera is calculated using the calibration task. Now, when I ...
101 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 ...
504 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: ...
540 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 ...
195 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 (...
403 views

### Mask outliers in an image

I'm using Binarization/Morphological Operators to detect apples as objects, which has gotten me so far: I did get the mask using this code ...
144 views

### Extract ROI from image by hand into Matrix Form

I have a 3D Image (each pixel contains information for various wavelengths). I draw the image for one wavelength by using ...
128 views

### How can I adjust ContourPlot in Mathematica?

I have problem because of the max point and min point, when I have too high or low data point, it just make it white. Here is example of data ...
203 views

### How to determine foci colocalization in a microscopy RGB image

I have a series of microscopy RGB images of the cell nucleus like this one The red and green dots are clusters of different proteins and I would like to determine when these dots colocalize. ...