How do I save the XY coordinates of a Binary Image in R?

问题

I am trying to save the XY coordinates of a binary image in R similarly to the save "Save XY Coordinates" function in ImageJ. I've looked through several image analysis packages available for R, but haven't yet figured out how to accomplish this.

回答1:

There are many ways to do the following in R:

img_fil <- "~/data/ZjYqw.jpg"
img <- magick::image_read(img_fil)
img_df <- RSAGA::grid.to.xyz(as.matrix(as.raster(img)))

head(img_df)
##   x   y       z
## 1 0 599 #ffffff
## 2 1 599 #ffffff
## 3 2 599 #ffffff
## 4 3 599 #ffffff
## 5 4 599 #ffffff
## 6 5 599 #ffffff

来源：https://stackoverflow.com/questions/39562605/how-do-i-save-the-xy-coordinates-of-a-binary-image-in-r