julia

using Images, ImageMetadata, TestImages, ImageView

pwd()

"/Users/a182501/quarto/program-chunk/posts"

source_image = load("/Users/a182501/quarto/program-chunk/cat.jpeg");
imshow(source_image);

size(source_image)

(360, 252)

cropped_image = source_image[100:290, 100:180];
imshow(cropped_image)

Dict{String, Any} with 4 entries:
  "gui"         => Dict{String, Any}("window"=>GtkWindowLeaf(name="", parent, w…
  "roi"         => Dict{String, Any}("redraw"=>Observables.ObserverFunction[Obs…
  "annotations" => Observable(Dict{UInt64, Any}())
  "clim"        => Observable(CLim{RGB{Float64}}(RGB{Float64}(0.0,0.0,0.0), RGB…

图像是列优先的，这意味着该第一个索引对应于y轴，第二个索引对应于x轴。这可能与其他编程语言不同。