Questions on the image processing capabilities implemented in Mathematica.

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4
votes
2answers
65 views

Adding the row and columns as frame ticks

This code: i = Import["ExampleData/ocelot.jpg"]; Show[i, Frame -> True] Gives this image. However, the margins have indices measured from the lower left ...
4
votes
4answers
153 views

Size of a square object in an image

I recorded the following image (28$\times$28 pixels) showing a bright square object (I used a square object of 35 micrometers side length and imaged it with a ...
1
vote
1answer
117 views

Can I set the alpha channel in a GIF image?

I have an image in GIF format: I want to set the alpha channel in this GIF. ...
24
votes
3answers
844 views

How to merge several partially overlapping screenshots into one image?

I have two screenshots: For a long screenshot picture I usually use PhotoShop to combine both images: How do I use Mathematica to make an automated program to do this? This is my current semi-...
8
votes
1answer
170 views

Can I split an image into subparts automatically?

I want to extract subimages from an image like below. There are 6 components in the image, I want to crop this image into 6 images in a way each individual image contain only 1 component. Can I ...
3
votes
1answer
102 views

Object detection in image

I have the following image, with a "large" object and 3 visible bright pixels: What I do not understand: Why do I count in the this ...
6
votes
0answers
2k views

Create “Ostagram” like Images using Wavelet Transforms

I am trying to make an "ostagram" like image using wavelet transforms and image keypoints. See the following link: https://www.facebook.com/ostagram/ This is done using neural networks, which I at ...
0
votes
1answer
37 views

Dynamic ImageHistogram [closed]

I want to plot dynamic "ImageHistogram" from by using my pc web camera I tried this: ...
0
votes
3answers
93 views

Determining the coordinates of the BoundingBox of an object in an image [closed]

I want to calculate and store the coordinates of the bounding box of the object area. I developed the following code, but it does not give the expected result. How can I fix it? ...
4
votes
2answers
140 views

How to find the Andromeda Galaxy

I would like to find the Andromeda Galaxy ($M31$) with the unaided eye. One way is to use the following image and graphic but I can’t find it just by looking in a dark sky. It is hard to detect ...
10
votes
5answers
452 views

How to align rotated images vertically

I have recorded images of a calibration target which I use to determine the resolution of a camera. For that I measure the distance of the parallel bright bars by measuring the brightness variation ...
3
votes
2answers
159 views

Fibonacci spiral in sunflower

How to find and detect the Fibonacci spiral in sunflower image? and how to get the following graph from initial image?
7
votes
1answer
100 views

How to interactively transform an image (rotate / translate / etc) on a per-component basis?

I have binary images like this one and I want to be able to interactively select its components and rotate them around its centroid by a different angle for each component. I may also want to ...
8
votes
1answer
133 views

ImageData to Image conversion

I assumed that Image and ImageData are inverses, so that the following expression gives back the original image. ...
7
votes
3answers
219 views

Find Background noise in Image

I have a set of 12 Images of a time dependent process. The Images also contain a static noise, which I want to get rid of. I had an idea to do that manually by looking at differences of images and ...
6
votes
2answers
160 views

Calculate area of black sea from image [duplicate]

There is a image of Black Sea from "Google Earth". I want to calculate area of black sea from this image using Mathematica The length of yellow line on this image is $100$ km (scale.) I try to ...
9
votes
2answers
372 views

Rotate an object in image about its centroid

I want to rotate an object in a image about its centroid. here is my code but the result is not as expected. Normally the centroid of the object does not change, except the case when the object is ...
1
vote
0answers
82 views

How to refocus camera?

I'm trying to read a barcode though my computer's webcam but it fails because the ImageCapture won't refocus the camera when I put the code close to it, and this it is blurry: Is there anyway ...
5
votes
0answers
55 views

How many clusters does DominantColors return?

Is there any documentation on how it automatically chooses the number of colors - does it use X-means or some other heuristic to determine the number of clusters it automatically returns?
1
vote
0answers
72 views

Google Cloud Vision vs ImageIdentify [closed]

Google has recently made their vision API publicly available (in beta release). I was hoping someone who has access to it could speak to how it compares with Mathematica's ...
6
votes
1answer
174 views

APIFunction on Images

Would someone example why my hello-world example is not working: ...
7
votes
4answers
389 views

Creation of a test image with 2d circular shaped objects having Gaussian brightness distribution profile

I want to create a test image which consists of 2d circular shaped objects each having a Gaussian brightness distribution profile. To make it simple objects should be the same. I then put the ...
1
vote
0answers
61 views

Speeding up ImageData[image,“Byte”]

For my image analysis I need the Byte values of many sequential 8bit PNG images. To obtain the Byte data I use: ...
0
votes
0answers
75 views

How to extract the edges in this image? [duplicate]

The question derive from this place.And as for its first current answer,I have some place not really satisfied like And the EdgeDetect have its limitation to ...
11
votes
4answers
2k views

How to make a Cahn–Hilliard model GIF

The question derived from @Jason B 's answer.I wanna make it but don't how to do.But we can get some rule about the GIF The change of the total pixel is very small. ...
2
votes
1answer
162 views

Generating x,y coordinates for an edge detection of image [closed]

i have a photo and I want to obtain the coordinates in a table form of its edge so that I could input the data into Autodesk Inventor May I know how I can do it
3
votes
1answer
101 views

How to reconstruct a given schematic picture from color image

There is a nice website on popular Economics with stylish picture. ...
13
votes
4answers
1k views

Reproduce image effect in Mathematica

How do I create the "dotifying" effect below in Mathematica? I have tried to use Rasterize first to get the image pixelated, but how do I get the disc/circle ...
2
votes
0answers
46 views

Image processing for tic tac toe [duplicate]

Last weekend I was at a hackathon at Georgetown University where my team and I wrote a python program that allowed our home made delta robot to autonomously play tic tac toe with a human user. The ...
6
votes
2answers
347 views

Boundary identification

I want to get boundaries of grains from a microphotograph. I have tried using different methods but because of the texture of background I am not able to get smooth boundaries. Codes that I've ...
3
votes
1answer
74 views

Is there a bug of InverseDistanceTransform?

This is a example of documentation about InverseDistanceTransform. But this is my picture But it doesn't work: ...
2
votes
2answers
263 views

Follow each pixel brightness in set of images (Memory constrained)

I have a set of 2700 consecutive png images (8bit, 2048*2048 pixels). I would like to visualize the intensity variation of each pixel vs. image number. Here is an example of 10 images: http://goo.gl/...
7
votes
2answers
412 views

Improving visibility of text in scanned image

I have as example the image below and would like to improve it in such a way that mainly the text is visible and the noisy background is removed. How can that be done best?
3
votes
0answers
69 views

NelderMeadMinimize for 2D Gaussian fitting

I would like to fit a large number (10^5-10^6) of small images to 2D gaussians by taking advantage of the NelderMeadMinimize package from Oleksandr: Shaving the last 50 ms off NMinimize. The ...
2
votes
1answer
81 views

extract data from a graph image

How do I convert the following image graph into data (if possible into function)? I checked this answer and found that my problem is grid and plot have same color.
23
votes
3answers
1k views

Detecting X or O in a small image

I am making a robot that plays Tic Tac Toe Currently, I have code that will parse the board and separate it into an array of 9 images, each space on the board. How can I detect if the image ...
9
votes
2answers
142 views

Slice a mathematica image into sub images along black straight lines?

I have a tic tac toe board I want to dynamically process in mathematica to have my robot play a user in tic tac toe. In order to determine the users move, I want to slice the board into 9 images, ...
15
votes
2answers
220 views

Counting number of tubes in an image

The task is to recognize the tubes on the ceiling in the following image Get the binary image ...
4
votes
1answer
99 views

Grayscale Morphology

How can I achieve grayscale morphological operations on 2D images in Mathematica. With morphology I mean operations like Dilation and Erosion. With grayscale I mean the operations that take images and ...
1
vote
0answers
52 views

Convex and concave regions of a closed curve [duplicate]

A few days ago, in Mathematica's help, I saw a function for recognizing if a closed curve has a positive or negative radius (convex or concave) like in the picture I found on the web, but without the ...
2
votes
0answers
92 views

Convert (rescale) 16 Bit png image

I have a camera (12 Bit Sensor, 2048 * 2048 Pixels). The images can also be exported in 16 Bit png format. Here different settings can be used. One setting is somewhat strange. For this special case ...
1
vote
1answer
111 views

Get an array of coordinates of the edges of an image

Rick Sanchez from Rick and Morty How can I get an array of coordinates of the edge of Rick in order from left to right? I want to make my delta robot draw images. Additionally, I know that it is ...
2
votes
1answer
119 views

How to get a full closed contour image [closed]

In this program, I need to select the point on the contour image that has the same abscissa as the center of the contour and has the highest ordinate. However, since the contour is not full closed, ...
8
votes
1answer
66 views

ImageForwardTransformation produces strange artifacts

I am trying to manipulate an image in equirectangular projection with ImageForwardTransformation. I want to change the projection's inclination to the ecliptic. For ...
6
votes
1answer
170 views

Finding mean brightness, standard deviation, count of pixels in gray scale images

I have many sequential gray scale images (2048*2048 pixels, 8bit). To determine the brightness, standard deviation, and count of pixels with in two bins, zero and non-zero brightness, I use the code ...
13
votes
2answers
505 views

Fitting a curve to an image object: not a superellipse, not an egg curve.. what else?

I'm facing the problem of quantifying the morphology of objects with such a shape (nannoconids... they are fossils). One of the final goals is to produce a solid of revolution and compute volume/...
2
votes
1answer
91 views

Splitting a rasterized image into its squares

I have rasterized an image using the following code: i = Import["ExampleData/lena.tif"] Rasterize[ColorConvert[i, "Grayscale"], RasterSize -> 45] This ...
3
votes
1answer
119 views

ImageHistogram with logarithmic y scale

ImageHistogram is much faster than Histogram with ImageData. The only problem: I cannot ...
2
votes
1answer
273 views

Histograms of gray scale images

I have a large set of subsequent 8bit gray scale png images (50 Hz). They show the noise of a CMOS camera, with the lens covered. A subset of 50 images is available here: https://goo.gl/Sa3P9P I ...
0
votes
2answers
104 views

Getting image data values with coordinates in circular region

I have a number of gray level images (600, with size: 2400x2400 pixel, small instance see above). In this image there is a circular region of interest. The aim is to fit a function to the gray value ...