how to convert image to numerical (0-1) pixel matrix in R

Question

i found the code to convert the image and got 480*288 numbers of data, because the pixel of the image is that. however, the matrix i want is just much less number matrix like: 19*12 or something. so how can i do that in the R? thanks a lot!.

library("EBImage")
img <- readImage("sample.jpg")
img <- channel(img, "grey")
write.csv(t(img), "sample.csv", row.names=FALSE)

Answer 1

为了减小所得矩阵的大小，您需要先使用resize来缩放图像，然后再将其保存到.csv文件中，请参阅我对R中调整图像大小的回答。