R Observatory: Metrics for picohdr version 0.1.1

Balamuta, James Joseph

doi:10.5281/zenodo.21843040

picohdr

0.1.1Package record

Read, Write and Manipulate High Dynamic Range Images

0packages depend

5.8Kdownloads / year

53.7%test coverage

0/13flavors OK

Overview

About

Maintained by Mike ChengCRAN page ↗GitHub ↗Issues ↗

High Dynamic Range (HDR) images support a large range in luminosity between the lightest and darkest regions of an image. To capture this range, data in HDR images is often stored as floating point numbers and in formats that capture more data and channels than standard image types. This package supports reading and writing two types of HDR images; PFM (Portable Float Map) and OpenEXR images. HDR images can be converted to lower dynamic ranges (for viewing) using tone-mapping. A number of tone-mapping algorithms are included which are based on Reinhard (2002) "Photographic tone reproduction for digital images" doi:10.1145/566654.566575.

Changes in 0.1.1

Fixes for CRAN
Undo any par() calls to restore environment
Fix quoting in DESCRIPTION

From NEWS.md in the release

Install

R (CRAN)pak (dev)Ubuntu (r2u)Fedora (COPR)openSUSE (OBS)

install.packages("picohdr", repos = "https://cloud.r-project.org/")

Installs the current CRAN release. Prebuilt binaries on Windows and macOS.

if (!requireNamespace("pak", quietly = TRUE))
  install.packages("pak", repos = "https://cloud.r-project.org/")
pak::pak("coolbutuseless/picohdr")

Development version from coolbutuseless/picohdr. Installs pak first if it is not already available.

Release

# enable cranapt (r2u) if it is not already set up, then install
grep -rqs r2u.stat.illinois.edu /etc/apt/sources.list /etc/apt/sources.list.d/ \
  || curl -fsSL https://raw.githubusercontent.com/eddelbuettel/r2u/master/inst/scripts/add_cranapt_noble.sh | sudo bash
sudo apt install -y r-cran-picohdr

Fast Ubuntu binaries via r2u (no compilation). The cranapt setup runs once and is skipped when it is already enabled. We list this channel from recorded r2u download activity rather than from a live index of the repository, so treat it as last known rather than guaranteed.

bspm (used by r2u) also needs make: sudo apt install make

# enable the iucar/cran COPR if it is not already present, then install
ls /etc/yum.repos.d/*iucar*cran*.repo >/dev/null 2>&1 \
  || sudo dnf copr enable -y iucar/cran
sudo dnf install -y R-CRAN-picohdr

RPMs from the iucar/cran COPR, rebuilt from CRAN.

For install.packages() integration in R, also: sudo dnf install R-CoprManager

# add the autoCRAN OBS repo (Tumbleweed) if it is missing, then install
zypper -q lr | grep -qi autoCRAN \
  || sudo zypper addrepo https://download.opensuse.org/repositories/devel:/languages:/R:/autoCRAN/openSUSE_Tumbleweed/devel:languages:R:autoCRAN.repo
sudo zypper install -y R-picohdr

RPMs auto-built from CRAN on openSUSE OBS (Tumbleweed). We list this channel from recorded autoCRAN download activity rather than from a live index of the repository, so treat it as last known rather than guaranteed.

Health

CRAN checks

13NOTE

Check messages

NOTEDESCRIPTION meta-informationr-devel-linux-x86_64-debian-clang, r-devel-linux-x86_64-debian-gcc, r-devel-linux-x86_64-fedora-clang, r-devel-linux-x86_64-fedora-gcc, r-devel-windows-x86_64, r-oldrel-macos-arm64, r-oldrel-macos-x86_64, r-oldrel-windows-x86_64, r-patched-linux-x86_64, r-release-linux-x86_64, r-release-macos-arm64, r-release-macos-x86_64, r-release-windows-x86_64

r-devel-linux-x86_64-debian-clang, r-devel-linux-x86_64-debian-gcc, r-devel-linux-x86_64-fedora-clang, r-devel-linux-x86_64-fedora-gcc, r-oldrel-macos-arm64, r-oldrel-macos-x86_64, r-patched-linux-x86_64, r-release-linux-x86_64, r-release-macos-arm64, r-release-macos-x86_64

Missing dependency on R >= 4.1.0 because package code uses the pipe
  |> or function shorthand \(...) syntax added in R 4.1.0.
  File(s) using such syntax:
    ‘exr-read.R’ ‘exr-types-read.R’ ‘exr-write.R’ ‘utils.R’

r-devel-windows-x86_64, r-oldrel-windows-x86_64, r-release-windows-x86_64

Missing dependency on R >= 4.1.0 because package code uses the pipe
  |> or function shorthand \(...) syntax added in R 4.1.0.
  File(s) using such syntax:
    'exr-read.R' 'exr-types-read.R' 'exr-write.R' 'utils.R'

CRAN check page ↗

Slowest check: 2.7 min · r-devel-windows-x86_64

Status changes

NOTE13 NOTE2026-06-09
WARNING12 NOTE, 1 WARNING2026-06-08
NOTE3 OK, 11 NOTE2026-03-10

Advisories

none known

How this is measured·How advisories are found

Documentation

In release 0.1.1

README· In the repository, left out of the releaseVignettesYes · 2 · dynamicNEWSYes · 100% structured · mentions 0.1.1Citation fileNoWebsitenot declared in DESCRIPTION

Help pages: 18 (1 internal)includes a package overview page
Examples that run: 100%17 run in a plain check (1 of them under a condition)
Exported functions with examples: 100%
Documented parameters: 95%
Return-value docs: 93%
Help pages citing references: 0%

Vignettes (2)

Introduction HTML
Tone Mapping HTML

How these are measured

Downloads

5.8K

CRAN downloads in the past year

Rank #11,879 · ~16/day · ~482/mo

Releases R versions

Daily download trend is not available in this view yet.

29330 days

92590 days

5.8K1 year

Compare downloads with other packages →

Also on383 r2u5 autocran

How downloads are counted

Repository

coolbutuseless/picohdr ↗Account: coolbutuseless

0Stars

0Forks

0Open issues

0Open PRs

0Releases

Last activity 2024-12-24

Responsiveness

not measured

How these are measured

PracticesBeta

4 development-tooling and community-health practices detected across 3 families in the upstream repository

Checks run against github.com/coolbutuseless/picohdr on 2026-10-21.

Continuous integration (2)

GitHub ActionsR CMD check workflow

The R CMD check workflow runs on Linux, macOS and Windows, and on R-devel

Docs source (1)

README.Rmd

Reproducibility and dev environment (1)

Dev Container

How this is detected·Detection ruleset v4 (2026-10-20)

Dependencies

Declared dependencies

5 external dependencies (excludes base and recommended)

Installing picohdr adds 1 package (1 with compiled code, 81 KB of source tarballs). Heaviest: ctypesio 81 KB.

Depends (0)

none

Imports (1)

ctypesio

LinkingTo (0)

none

Suggests (4)

knitr rmarkdown ggplot2 testthat

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

0direct

0indirect

Nothing depends on this yet.

How these are counted

Code & Tests

People & History

People (1)

Mike Cheng

Releases (1)

R
R 4.6.0 released · 2026-04-24
R
R 4.5.0 released · 2025-04-11
0.1.1Latest
record
2024-10-28 · current release
R
R 4.4.0 released · 2024-04-24

Package metadata

First published: 2024-10-28
Total releases: 1 / 2 yrs
License: MIT + file LICENSE OSI
Copyright: The included images in the 'inst/image' directory were created by the package author (Mike Cheng) and are licensed under CC0 1.0. See 'COPYRIGHTS' file for more details.
Download size: 3.9 MB

Cite

Cite this package

Run in R for the authors' preferred citation:

citation("picohdr")

Format

Cheng, M. (2024). picohdr: Read, Write and Manipulate High Dynamic Range Images (Version 0.1.1) [Computer software]. https://doi.org/10.32614/CRAN.package.picohdr

This package has no citation file, so citation() returns this entry built from DESCRIPTION.

Cite the R Observatory

For a number measured here: a download total, a coverage figure, an archival date.

Format

APA

Balamuta, J. J. (2026). R Observatory: Metrics for picohdr version 0.1.1 [Data set]. HJJB, LLC. Data release v2026-10-25. https://doi.org/10.5281/zenodo.21843040

From data release v2026-10-25, which the citation names so these numbers can be found later. More on citing and the projects behind them.

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