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Questions tagged [image]

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

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2
votes
1answer
442 views

How to make a big image/dashboard containing various data-graph

I want to make and image/dashborad (to export to PDF) with many VERTICAL bullet graphs gauges. And I can´t make it, in a automatic way. In general, the questions are: QUESTION 1: How to make a ...
19
votes
1answer
760 views

When exporting an (animated) GIF, is it possible to specify the size of the color palette?

I've exported an animation to animated GIF, which generated a 15mb file. I've been asked if I could regenerate the file, limiting it to only 16 colors, but I can't find any documentation on how I ...
9
votes
5answers
1k views

How to resize the text content of a grid with it?

I am in a resizing mood these days. This code works quite well, up to a point. ...
7
votes
3answers
1k 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 ...
6
votes
3answers
221 views

Which values did ImageAdjust choose?

I have a picture obtained from a camera in an experiment. It's a .dat file, contains only numbers. I can re-create the image by importing it as data and using the ...
4
votes
1answer
432 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 ...
12
votes
1answer
161 views

“Boundary” thickness in HighlightImage

Bug introduced in 11 or earlier and persisting through 11.3 CASE:4076121 I'm having a hard time to understand how I can use HighlightImage and only draw the ...
11
votes
2answers
243 views

Magnifying the Help documents without magnifying the images therein

In Mathematica's Option Inspector I set the notebook magnification factor to be larger than 1, for example 1.12 ("Notebook Options"->"Display Options"). Accordingly contents of the Documentation ...
10
votes
1answer
229 views

A bug in Rasterize?

I plot a straight diagonal line and then simply rasterize it. Consider what happens (Mathematica 8.0.4, 10.2 and 11.1.1 on Windows 7 x64): ...
6
votes
1answer
1k views

How to use an image as a plot background

Is it possible to use an image as a plot background?
3
votes
1answer
205 views

Fast reading, writing of png images

One of the fastest implemented mathematica function to read png images was showed here by MarcoB The code for reading a png he proposed is: ...
7
votes
1answer
446 views

Color ramp banding in PDFKit when exporting Raster image Inset to PDF

Here I produce a Raster image with large uniformly colored rectangles and put it in an Inset: ...
7
votes
2answers
315 views

How to resample a list of Images

I have a list of picture(Noting the ordering) first: second: third: forth: My target is get the 3D'image,Now I get the mask of it like following(If you use ...
6
votes
3answers
3k views

Understanding Bilinear ImageResize

In trying to understand basic image transformations, I have attempted to code my own image resize function that uses bilinear interpolation. I checked my work against Mma's ...
2
votes
0answers
338 views

How can estimate the PSF function to deblur an image of plate licence of a car [duplicate]

I want to deblur an image of a licence plate of a car. I have used the ImageDeconvolve[] function and Sharpen[] but the problem ...
35
votes
3answers
2k views

Drawing picture with straight lines (Petros Vrellis's Art)

I am trying to extend Writing a word with straight lines for any picture/image. I guess the basic idea is to find a set of points in the image region and then draw random lines through them. Let's ...
27
votes
1answer
5k views

Is there a way to convert an image into a Graph?

I'm trying to convert an image with several overlapping dots into a Graph. The goal is to be able to derive the Kirchhoff matrix for the randomly created "network ...
21
votes
2answers
768 views

Reconstruct a graph from an image (curved edges and edge crossings)

Actually, I posted a very similar question before this.How to generate a Graph from a picture of a graph Dr. belisarius's answer have answered that question, but I find a limitation in that method: ...
15
votes
1answer
487 views

Quickly importing several thousands of jpg files?

I have several thousands of small .jpg files (30kb each) which I need to import into Mathematica. (I plan to use ImageDistance ...
13
votes
2answers
3k views

Push-pin Art – Convert image to R-Y-B-W-Blk color space

After seeing an example of what is called “Push-pin Art”, I assumed that Mathematica would be able to handle the kind of image processing required to convert an image to this format. I am not well ...
15
votes
1answer
1k views

Ellipse counting from image

I have hundreds of images similar to this image: I'm looking to count the number of ellipses as well as their major and minor diameters. The ellipses are touching, hence, ...
13
votes
1answer
612 views

How to align a poster?

I'd like to crop and transform out the magazine cover so that it is rectangular. I read the docs for ImagePerspectiveTransformation, and here's where I got to. ...
8
votes
1answer
453 views

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

I would like to stitch together a pair of images. For example: ...
7
votes
2answers
236 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 ...
16
votes
3answers
949 views

Apply an image as a texture to text

I have the following equation eq = Sum[x^2, {x, 0, 10}] and an image ...
12
votes
1answer
517 views

How can I extract the outline of bubbles in my image?

I have an image: I tried to extract the outline of the bubbles, but I met with some problems. Firstly I tried the method used in Mathematica documentation for ...
16
votes
3answers
1k 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 ...
20
votes
1answer
289 views

How to count proportion of two phase in a electron microscope picture

I have a picture: The sunk area is a phase,and the bulged area in another phase.I want count the proportion of this two area.this is my method.First I get the mask ...
13
votes
3answers
2k views

How can I convert colors to grayscale?

I want to change the above colored plot into a grayscale plot. I have tried this: CCGray[pic_?ImageQ] := Module[{}, ColorConvert[pic, "GrayScale"]]; but it doesn'...
13
votes
2answers
473 views

Extracting data from analog screen photograph

I'm using an analog profilometer from the 1970s and need a way to digitize the data and the only way is through a photograph. I've searched but all I could find was how to extract data from computer ...
5
votes
1answer
511 views

How to return position of one image inside of another [duplicate]

With ImageAlign result is another image, that is composition of another two. But I'm looking for function that will find position, x-y coordinates of smaller image ...
14
votes
1answer
379 views

High memory use while exporting a BMP

Something mysterious is going on when exporting images. I'm using Mathematica 9.0.1 on Windows 7 (64 bit), and find that the memory use is excessive when exporting to a bmp. But it doesn't happen ...
10
votes
3answers
472 views

How to convert the binarize-picture to a Region

The Region of Mathematica is nice,and is the new conception of version 10.0.I can convenient get ...
10
votes
2answers
1k views

How to use Mathematica to turn a picture into low poly style?

I want to use Mathematica to turn a picture into low poly style. That is, to make the following conversion: Bill to Bill low poly(Using Image Triangulator App). I think the biggest difficulty is how ...
7
votes
1answer
307 views

Optimal Binarize value for counting experiment

I am currently working on a physics experiment where I count particles. I have looked at and used a bit of code from the following sources: Cell counting from an image file and Count Elements in Image ...
7
votes
1answer
225 views

How to make marker images?

In the docs for GrowCutComponents[] there are many examples of masks, but I don't know how to make one for myself. I suppose they are using the drawing tools in ...
6
votes
1answer
174 views

Strategy to build efficiently an image using parts of many images

I have about 1000 images of 1000px $\times$ 1000px and a list which contains the coordinates of the pixels to select, for each of the 1000 images. Each pixel is used once, so the final image is a full ...
5
votes
3answers
780 views

Slow image manipulation

This is some extremely simple code that shows an image and manipulates a circle (that will be used to select a region of the image to analyze). All those Dynamics ...
5
votes
1answer
1k views

Circular crop: extract non rectangular parts of an image

I want to extract a part of an image. For example, let's start with something like the following image: I would like to apply some image processing to get this result: I have tried to manipulate <...
4
votes
1answer
194 views

Image Segmentation

I have what should be a pretty simple question for Mathematica gurus. I have a set of images containing cars and a background. I am trying to create a black and white image where the white part is the ...
17
votes
1answer
368 views

Grid cuts my images

Bug introduced in V9.0 or earlier and persisting through V11.2 pic2 = ImageResize[ ImageCrop@Rasterize@Graphics@Disk[], {Automatic, 40}] ...
14
votes
1answer
775 views

How to recreate a certain word cloud

This is my current method: ...
12
votes
2answers
3k views

Extract timestamp of specific frames in video

I would like to do the following : I have a set of slides and a video in which those slides are discussed. Now I would like to extract the timestamp when the slide appears in the video. I would ...
6
votes
1answer
628 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 ...
5
votes
1answer
271 views

Resampling when using image as Texture

How to get sharp pixel boundaries with Texture? I'd like to have only black/white in the example below, no gray. ...
4
votes
2answers
705 views

Recognize simple shapes in an image and color them randomly?

I have an image of polygons built from a polar function (see below). I'd like to color each triangle or quadrilateral a random color. Firstly, I'm not sure how to separate the simple shapes. ...
2
votes
2answers
164 views

How to display colored graphics object in the same color space?

Consider, I have a disk colored in "LAB" color space. When I convert the graphics into image object it is by default getting converted into "RGB" color space. ...
2
votes
3answers
493 views

Visual superposition of two images

In a previous question Karsten 7. proposed an elegant image-manipulation solution on how to overlay two images. However in the following case the method does not properly work and needs refinement. ...
1
vote
1answer
886 views

Problem with Fourier and InverseFourier function

I have the following code Image[img, ImageSize -> 300] data = ImageData[img]; fdct = Fourier[data] tdata = InverseFourier[fdct]; Image[tdata] but it seems to ...
14
votes
1answer
233 views

HighlightImage does not work consistently with Line

Bug introduced in 10.2, fixed in 11 HighlightImage is supposed to work with graphics-primitives like Line and ...