Questions on the image processing capabilities implemented in Mathematica.

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2
votes
2answers
127 views

ImageData reverses the order of the row of an Image [duplicate]

Could someone convince me what is the utility of doing a function like ImageData that reverses the order of rows in an image? Why was it coded like this? Why does ...
13
votes
2answers
2k views

Creating 3D dice

How to create an image of a 3D die from the 2D images? There is an example in the Documentation Center I tried but it doesn't work.
4
votes
1answer
94 views

Detecting rectangle shape from an image

Motivation: I want to automate the process of analyzing "Electron SpectroMeter (ESM)" data. ESM uses magnets to bend electrons so that electrons with different energy are separated spatially. ESM ...
13
votes
5answers
2k views

Fit image of mountain to gaussian

I want to detect the edges of an image of a mountain and then fit that to a gaussian. I am unsure about how to only get the mountain edge, rather than every single edge in the image. How do I ...
3
votes
2answers
93 views

Share a method to patch the discontinuous line in a image

Similar to this post which I have posted before(How to patch fingerprint ridges),Its solution's level higher than my expectation.So cost my these days to research this.Now I'm glad to share my fruit ...
3
votes
2answers
155 views

Zigzag ordered encoding of DCT co-efficients

I am doing DCT steganography. I have obtained a matrix of DCT co-efficient. I now want to perform zig-zag ordered encoding. The matrix is as follows ...
0
votes
0answers
59 views

Inpaint command use in Extending Van Gogh’s Starry Night with Inpainting

I'm trying to have some fun with the Wolfram Blog and am reading Extending Van Gogh’s Starry Night with Inpainting. He has this first image: My first question is how did he get the black and white ...
4
votes
2answers
102 views

Using mask to segment growing cells over multiple timepoints

I am trying to segment some very irregular cells out of images generated by timelapse microscopy. These cells don't fit any simple shape (not circular or elliptical) and they grow and change shape ...
7
votes
2answers
305 views

Finding objects in images with inhomogeneous background

I have the following image where bright circular shaped objects are seen. The image has usually an inhomogeneous background and ...
3
votes
0answers
83 views

Remove shaded relief effect from an image [closed]

Thank you everyone for your comments. This is my edited version of the question. I've got a shaded relief effect map that is showing topography data of an area. Each color represent an elevation ...
4
votes
2answers
63 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
144 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
109 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. ...
23
votes
3answers
811 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 ...
8
votes
1answer
153 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
90 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
82 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
135 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
436 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
148 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
93 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
126 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
207 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 ...
5
votes
2answers
151 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
352 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
79 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
53 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
59 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
161 views

APIFunction on Images

Would someone example why my hello-world example is not working: ...
7
votes
4answers
381 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
60 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
137 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
99 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
45 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
316 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
256 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: ...
7
votes
2answers
401 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
65 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 ...
0
votes
1answer
70 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.
22
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
135 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, ...
14
votes
2answers
203 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
85 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 ...