Mac 10.13.1（High Sierra）下Studio中Imager包无法使用求助

Hey there, let's work through this issue since your functionality was working perfectly before installing the imager package. The "image not found" error can stem from a few common spots—here are the steps to diagnose and fix it:

• Verify the imager package installation completed successfully
  Sometimes package installs can fail silently or miss critical dependencies. Try reinstalling the package to rule this out:

  • For the CRAN version: install.packages("imager", dependencies = TRUE)
  • For the development version: devtools::install_github("ropensci/imager")
    Keep an eye on the console during installation—if there are error messages about missing system libraries, that’s a key clue to follow up on.

• Check for missing system-level dependencies
  Imager relies on underlying system libraries to process image files. Depending on your operating system, you might need to install these first:

  • Ubuntu/Debian: Run sudo apt-get install libpng-dev libjpeg-dev libtiff-dev libfftw3-dev
  • macOS: Use Homebrew to install brew install libpng jpeg libtiff fftw
  • Windows: Ensure Rtools is installed and properly configured (it should be detected automatically when installing source packages)

• Confirm your image file path is valid
  The error might not be with the package itself, but with how you’re referencing your image. Try these checks:

  1. Run file.exists("path/to/your/image.png")—if this returns FALSE, your path is incorrect (double-check typos or relative vs. absolute path issues).
  2. Test with an absolute path instead of a relative one to eliminate working directory confusion. For example: load.image("/Users/yourname/Documents/test_image.jpg")

• Test in a clean R session
  It’s possible another package is conflicting with imager. Restart R, don’t load any other packages, then run a simple test with a sample image included in the package:

  library(imager)
  sample_img <- load.image(system.file("extdata/Leonardo_Birds.jpg", package = "imager"))
  plot(sample_img)
  

  If this works, the issue is likely a conflict with another package you usually load.

• Check version compatibility
  Outdated versions of R or imager can cause unexpected errors. Make sure you’re running a recent R version (3.6.0 or newer is recommended for imager), and that you have the latest version of the imager package installed.

内容的提问来源于stack exchange，提问作者emeric lemaire