Title: Optimize and Compress Images
Version: 0.2
Description: Optimize and compress images using 'Rust' libraries to reduce file sizes while maintaining image quality. Currently supports lossless PNG optimization via the 'oxipng' crate. The package provides functions to optimize individual image files or entire directories, with configurable compression levels to balance between file size reduction and processing speed.
License: MIT + file LICENSE
URL: https://github.com/yihui/tinyimg
BugReports: https://github.com/yihui/tinyimg/issues
SystemRequirements: Cargo (Rust's package manager), rustc
Encoding: UTF-8
RoxygenNote: 7.3.3
Suggests: testit
Config/rextendr/version: 0.3.1
NeedsCompilation: yes
Packaged: 2026-02-18 05:57:22 UTC; yihui
Author: Yihui Xie ORCID iD [aut, cre, cph] (URL: https://yihui.org), Authors of the dependency Rust crates [ctb, cph] (see AUTHORS file)
Maintainer: Yihui Xie <xie@yihui.name>
Repository: CRAN
Date/Publication: 2026-02-20 10:30:02 UTC

tinyimg: Optimize and Compress Images

Description

The tinyimg package provides tools for optimizing and compressing images using Rust libraries.

Author(s)

Maintainer: Yihui Xie xie@yihui.name (ORCID) (https://yihui.org) [copyright holder]

Other contributors:

See Also

Useful links:

Optimize PNG images

Description

Optimize PNG files or directories of PNG files using lossless compression.

Usage

optim_png(
  input,
  output = identity,
  level = 2L,
  alpha = FALSE,
  preserve = TRUE,
  recursive = TRUE,
  verbose = TRUE
)

Arguments

input

Path to the input PNG file or directory. If a directory is provided, all PNG files in the directory (and subdirectories if recursive = TRUE) will be optimized.

output

Path to the output PNG file or directory, or a function that takes an input file path and returns an output path. When optimizing a directory, output should be a directory path or a function.

level

Optimization level (0-6). Higher values result in better compression but take longer.

alpha

Optimize transparent pixels for better compression. This is technically lossy but visually lossless.

preserve

Preserve file permissions and timestamps.

recursive

When input is a directory, recursively process subdirectories.

verbose

Print file size reduction info for each file.

Value

Character vector of output file paths (invisibly).

Examples

# Create a test PNG
tmp = tempfile()
png(tmp, width = 400, height = 400)
plot(1:10)
dev.off()

# Optimize with different levels
optim_png(tmp, paste0(tmp, "-o1.png"), level = 1)
optim_png(tmp, paste0(tmp, "-o6.png"), level = 6)