imagerExtra was removed from CRAN
imagerExtra 1.3.1 has two problems.
The R package tessetact is in Suggets field of imagerExtra.
However, tesseract is not used conditionally in imagerExtra 1.3.1.
This is a problem.
To prevent installation failure on Solaris, the following code is used in imagerExtra1.3.1.
if (Sys.info()["sysname"] != "SunOS")
This code violates the following CRAN policy.
Package authors should make all reasonable efforts to provide cross-platform portable code.
This is another problem.
I solved these problems to use the following code instead of the above code.
if (requireNamespace("tesseract", quietly = TRUE))
The code has been implemented in imagerExtra1.3.2.
I submitted imagerExtra 1.3.2 to CRAN.
A CRAN member will respond within 2 weeks.