ImageIO.jl

FileIO.jl integration for image files

| Format | Extensions | Provider | Implementation | Comment | | ------- | ---------- | -------- | ---- | ----------- | | JPEG | .jpg, .jpeg | JpegTurbo.jl | Julia wrapper of libjpeg-turbo | Benchmark results against other backends | | OpenEXR | .exr | OpenEXR.jl | Julia wrapper of OpenEXR | | | Portable Bitmap formats | .pbm, .pgm, .ppm | Netpbm.jl | pure Julia | | | PNG (Portable Network Graphics) | .png | PNGFiles.jl | Julia wrapper of libpng | Benchmark vs. ImageMagick & QuartzImageIO | | QOI (Quite Okay Image) format | .qoi | QOI.jl | pure Julia | | | DEC SIXEL (six-pixels) graphics | .six, .sixel | Sixel.jl | Julia wrapper of libsixel | | | TIFF (Tag Image File Format) | .tiff, .tif | TiffImages.jl | pure Julia | check OMETIFF.jl for OMETIFF support | | WebP | .webp | WebP.jl | Julia wrapper of libwebp | |

Installation

Install with Pkg:

pkg> add ImageIO  # Press ']' to enter te Pkg REPL mode

Usage

using FileIO
save("test.png", rand(Gray, 100, 100))
load("test.png")
save("test.ppm", rand(RGB, 100, 100))
load("test.ppm")
save("test.tiff", rand(RGB, 100, 100))
load("test.tiff")

Canonicalization

Some image loaders may return custom AbstractArray types. By default, this package "canonicalizes" the returned type to be either Array or IndirectArray. An exception is for calls like load(filename; mmap=true) where the image data will be "lazily" loaded using memory-mapped IO, in which case the default is to allow the lower-level I/O package to return whatever AbstractArray type it chooses.

You can manually control canonicalization with load(filename; canonicalize=tf) where tf is true or false.

Compatibility

If you're using old Julia versions (VERSION < v"1.3"), a dummy ImageIO version v0.0.1 with no real function will be installed. In this case, you still need to install ImageMagick.jl to make FileIO.save/FileIO.load work.