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

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14
votes
2answers
274 views

SaveDefinitions->True changes the displayed image

Bug introduced in 9.0.1 or earlier and persisting through 10.1.0 or later I have a Manipulate[ ] that displays an image with a superimposed ...
1
vote
0answers
39 views
7
votes
1answer
52 views

Setting an image as the background of a GeoGraphics image

It's easy to set the background of a GeoGraphics image to black, e.g., ...
7
votes
2answers
307 views

Using a given colour table with Image?

Context I would like to represent large images with a given colour table. Now, if I use Image ...
5
votes
0answers
115 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 ...
1
vote
1answer
104 views

Exporting File Outside Home Directory

When running Mathematica (v10) on my Raspberry Pi, I'd like to output an image file to a directory other than /home/pi. I understand that letting Mathematica write ...
12
votes
2answers
959 views

Failure to export graphics by right-click when Notebook magnification is changed

Bug introduced in 9.0.1 or earlier and persisting through 10.1.0 or later When I try to export graphics as PNG, JPG and other rasterized formats using the right-click and choosing ...
10
votes
2answers
483 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 ...
1
vote
0answers
70 views
25
votes
7answers
3k views

Embed Code Into Image

I often export images(plots, matrix, arrays, etc..) from mathematica which I end up putting in word documents or uploading to the web. The problem is that I often lose the original code and I am left ...
1
vote
1answer
52 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 ...
1
vote
1answer
72 views

How to scrape image search engines?

I'd like to download highest resolution images possible from the search results like these: ...
16
votes
1answer
595 views

How to identify chemical substance from tattoo?

A friend of mine made a tattoo on his chest of some chemical substance formula. He challenged us to identify which substance is that. I thought that perhaps a combination of: Mathematica image ...
0
votes
0answers
49 views

Is it possible to import Matlab “.fig” files in Mathematica?

Is it possible to import a ".fig" file made in Matlab into Mathematica? If I try the usual Import[filename] it produces an error ...
1
vote
1answer
106 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 ...
4
votes
1answer
79 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 ...
0
votes
2answers
54 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 ...
3
votes
2answers
78 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 ...
6
votes
0answers
259 views

Bug report: Attempting to Save Selection As… in a magnified Notebook fails with errors [duplicate]

Bug introduced in 9.0.1 or earlier and persisting through 10.0.2 or later I have found that attempting to Save Selection As... in a magnified Notebook fails with errors. On my system it can be ...
9
votes
1answer
176 views

Raster to Image conversion problem

Update: NOT fixed in v 10.1 (Mar2015) (10.1 behaviour is the same that with 10.0.2) There are 3 ways to convert a Raster into an Image : only 1 works for me with version 10.0.1,10.0.2,10.1.0 , and ...
1
vote
2answers
63 views

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

I can use this code to label my points with text. ...
4
votes
1answer
116 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 ...
8
votes
0answers
106 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 ...
2
votes
1answer
115 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 ...
0
votes
2answers
48 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 ...
7
votes
1answer
101 views

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

I would like to stitch together a pair of images. For example: ...
2
votes
3answers
203 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 ...
4
votes
3answers
197 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 ...
5
votes
4answers
168 views

Coloring an image with two Color schemes based on a Range

I would like to color an image generated from some data using two colorschemes based on two ranges of the data. This is my attempt. ...
3
votes
2answers
74 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" ...
2
votes
1answer
60 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?
2
votes
2answers
135 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 ...
1
vote
0answers
102 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 ...
0
votes
0answers
40 views

“Enlarge” a plot for export

I wish to export a plot with more resolution than it starts with. Interactively, I can do this by enlarging the image, and then exporting. Is there a way to do this programmatically? I attempted to ...
0
votes
0answers
54 views

Automatic measurement of components in a picture

I have a tricky problem, with which I'm stuck just after a few steps. I have the following picture of a slice of the brain. I want to detect all the named structures and measure the area of those ...
5
votes
2answers
182 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 ...
3
votes
2answers
60 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 ...
4
votes
1answer
135 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, ...
0
votes
0answers
41 views

How to export a PNG with an alpha channel?

Is "RGBA" not a supported colorspace? Export["test.png", RandomImage[1, {100, 100}], ColorSpace -> "RGBA"]
0
votes
0answers
44 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 ...
1
vote
0answers
145 views

Using 2D Fourier transform of an image to detect typical wavelengths

I am new to Mathematica, and I have read this post to understand how to perform Fourier transform on an image. My mission is to extract information on the typical distance between the black patches in ...
1
vote
0answers
47 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, ...
4
votes
1answer
202 views

How to change the aspect ratio with drawing tool?

I'm drawing an image in editing an slide show with the drawing tools. But the aspect ratio of the created drawing seems fixed and not changeable with mouse dragging the border and corner as in other ...
6
votes
2answers
831 views

How do I display imported images at actual size?

I know that this is an extremely basic question, but I am having a lot of trouble finding the answer in the documentation. When I import an image (for example, ...
4
votes
0answers
96 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 ...
2
votes
1answer
164 views

How can I download images from Instagram and Twitter?

The new function ServiceExecute seems to suggest the ability to download images containing a specific hashtags. Can anyone get this to work?
1
vote
1answer
66 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 ...
11
votes
1answer
228 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.
2
votes
2answers
73 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. ...
4
votes
1answer
138 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 ...