31 questions linked to/from Recovering data points from an image
4k views

How to do deconvolution in spectrum with some peaks?

For example, I have the next spectrum: I've seen the next question ["How to perform a multi-peak fitting?"] but not answer to my question. I want deconvolution the spectrum to obtain three peaks (...
137 views

How to read value from a plot

Let's say I have plot. What is the command for getting the specific value at a point that I choose? Exampe: Plot like --I-. command(1) = 0 command(2) = 0, command(3)=1, command(4)=0
124 views

Detect and correct sheared squares in image

I have the image I want to detect the plots and warp them into perfect squares. My workflow so far: corners=ImageCorners[img,10]; This returns a lot of corners, ...
180 views

Extracting a Mathematica approximation of a curve from an image

Suppose I have an image like the following: and suppose Mathematica knows the correct scale of the image. Is there a way I could get Mathematica to approximate this with, say, a Bezier curve? ...
122 views

Equation of graph from graph [duplicate]

How would I go about finding the equation of the solid black line exponential/logarithm graph? The two data points are: (x,y) (9,-14) (20,-21)
3k views

How to make a curve selectable from a scaned image and convert it to a list of coordinates

I have a scanned image (binary-ized): Is there any way to reduce one of these curved lines (full or dotted) to a series of its coordinates (e.g., sampling interval of 0.01 on x-axis)? I've read ...
126 views

Creating a plot from an image of the plot

I have an image of a plot at https://imgur.com/a/h9OWP6p Import["https://i.imgur.com/vNqm0Em.png"] I want to create a plot of it, consistent with the scale in ...
75 views

Detection the coordinates of all points of a curve on an image file [duplicate]

I have a plot of a curve (the black curve without dashes) on an image file.jpg: http://s000.tinyupload.com/index.php?file_id=48857135704766357735 I'd like to detect the coordinates of all point of ...
556 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 ...
15k views

Problem with NonlinearModelFit

I'm having trouble with a non-linear fit: fit = NonlinearModelFit[data, y0 + A Sin[\[Pi] (x - xc)/w], {y0, xc, A, w}, x] where ...
186 views

Extract region analytic expression from an image

I need to extract the bounds of the yellow and green regions in the picture at the end of the post. I need only to reproduce these regions on mathematica. I tried with the algorithm described here ...
185 views

Finding position of text returned with TextRecognize

I am trying to extract data from images (using some of the methods presented in ), and would like to have a way to selectively cover/remove text from axes and legends. ...
53 views

Recovering data from a plot [duplicate]

Suppose I have an image which I got from a screenshot \ [![enter image description here]] : https://i.stack.imgur.com/0Iuj2.png \ Nothing else is there. Now I want my x-axis range (0,1) ...