Questions tagged [image-processing]

Questions on the image processing capabilities implemented in Mathematica.

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3
votes
2answers
113 views

How to find the center of rows in a grayscale image of a data table

I have such images I want to draw a red line in every line content like this: If I accumulate the pixel value for every line, I can get the red curve line: ...
3
votes
1answer
58 views

Need Help for Layout

I am preparing pdf's with an image, a description and a QR code linking to that image hosted on the web. However for now the QR code is always positioned just bellow the description. I would like to ...
3
votes
4answers
680 views

How to detect end points in a binarize picture

There is a picture: When I try to use MorphologicalTransform to detect the end points ...
3
votes
1answer
247 views

ImageHistogram with logarithmic y scale

ImageHistogram is much faster than Histogram with ImageData. The only problem: I cannot ...
3
votes
3answers
296 views

Slow image processing using ReplaceAll

Can anyone explain me, why this line of simple code is so slow? And can it be improved somehow? ...
2
votes
2answers
237 views

Why ColorReplace does not follow the rules specified?

I tried to use ColorReplace to change the colors obtained from MorphologicalComponents. However some of the changes didn't ...
2
votes
2answers
167 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 ...
2
votes
1answer
85 views

Segmenting cells from a stained image of cells from microscope

I have an image which has stained cells and I have to segment all the cells. But the problem is that the cell boundary is not very distinguished where there is staining done because of the stain. ...
2
votes
0answers
183 views

How to extract data points from an image of a log log plot? [duplicate]

I have a picture of a log-log plot, taken from a paper and I want to extract the data points so I will be able to plot them again along with results of my own solution. I would appreciate your help. ...
2
votes
1answer
94 views

Calculate the surface area of different elements in a picture (micrograph)

This is a micrograph of a hybrid material that contains glass fiber (small white dots), carbon fibers (big grey dots) and a matrix that contains everything! I would like to calculate the surface area (...
2
votes
2answers
141 views

How to remove those rectangle within another rectangle

Suppose I have some rectangle rects: ...
1
vote
1answer
106 views

Is it possible to get the coordinates only for the highlighted points from an image?

I would like to ask you if it is possible to get the coordinates or a couple of numbers that can give me the positions of the highlights points (selected using HighlightImage function) in an image. I ...
1
vote
1answer
177 views

Image3D - plot physical axes scales

I have read in 600 thresholded gray scale images (located here - 14MB, png, 8bit, 300*200 pixel) into Image3D with: ...
1
vote
0answers
507 views

Cell counting from an image file [closed]

I have a lot of cell culturing pictures. One of the example is as follows: Every black dot represents a cell, and I need to count only the cells on the image. I have a code to detect and count the ...
1
vote
1answer
145 views

PNG image is exported smaller size than imported

I upload a PNG file and then split it into its red, green and blue components. I then save these components. The original image is 1440 x 764 pixels, 2.21MB. But the 3 saved files are each 360x198 ...
1
vote
1answer
418 views

Generating a list of contour pixels for a morphological component

I have a set of pixilated shapes, and after transforming each shape into a morphological component, I want to be able to return the coordinates for pixels that lie on the contour of the shape. More ...
1
vote
1answer
339 views

Extract data from an image of a density plot?

I have a density plot in image form and would like to extract the data points from it. How would I go about using Mathematica to accomplish this? My ideal output ...
0
votes
1answer
329 views

Extracting the contour lines from an image [duplicate]

The Image presented is created by Mathematica ListPLot. It's a list of points out of a 512x512 grid, which meets criteria. I would like to be able to identify the ...
0
votes
1answer
145 views

Resulting list of ComponentMeasurements

I detect a single bright object in an image with the following code; ...
0
votes
1answer
87 views

What's wrong when I use ImageApplyIndexed?

I am reading a ebook called Basic image processing in Mathematica which can download free in the iBooks. In the page 114,it introduce a function ImageApplyIndexed...
0
votes
1answer
128 views

How to segment an image based on MeanEuclideanDistance?

Consider an image (img) as Now I have partitioned the image using the following command parts = ImagePartition[img, 32]; ...