How to digitize the figure?

Question

Consider the following figure:

Could you please tell me how to extract the brown curve ($a\to KK\pi$) from it (i.e. the dependence Gamma[ma]?

I don't have time for a full answer, but this should at least create an image that is easier to deal with: With[{data = ImageData[RemoveAlphaChannel@img]}, Image[Unitize[data - Threaded[{130, 22, 4}/255]]]*Image[Unitize[data]]]. {130, 22, 4} is the RGB value of the brown line — Sjoerd Smit, Feb 28 '23 at 16:54
As I have mentioned in your previous question, this looks like a vector image. Please provide the source of your image – extracting curves directly from vector graphics is significantly easier than from a raster image. — Domen, Feb 28 '23 at 16:55
Does this answer your question? How to make a curve selectable from a scaned image and convert it to a list of coordinates Also: How can I extract trace points from an oscilloscope image? — Domen, Feb 28 '23 at 16:59
@Domen : the source figure (.pdf) is here: https://www.dropbox.com/s/8yjacqyjyhx2trx/a_rate.pdf?dl=0 — John Taylor, Feb 28 '23 at 20:42
Please edit your question to include the source, rather than putting thie informaition in a comment. — bbgodfrey, Mar 01 '23 at 04:53

score 3 · Accepted Answer · answered Feb 28 '23 at 16:58

3

Assuming

pic="your image"

you could start with

dc = Rest@ DominantColors[pic]
Map[ListPlot[PixelValuePositions[bild, #, .1 (*Colordistance*) ], 
Axes -> False, PlotStyle -> #] &, {dc[[-3]]} ][[1]]

answered Feb 28 '23 at 16:58

Ulrich Neumann

1 Answers1