An indirect way to convert a TIFF to a JPEG image is to read the TIFF image and then write the JPEG using the TIFF and JPEG batch. For example:
#Load
library("jpeg")
library("tiff")
img <- readTIFF("origin.tiff", native=TRUE)
writeJPEG(img, target = "Converted.jpeg", quality = 1)
source
to share