png-metadata-writer
v1.0.1
Published
library to read and write PNG Metadata
Downloads
167
Readme
png-metadata-writer
library to read and write PNG Metadata
w3 PNG Chunks specification: https://www.w3.org/TR/PNG-Chunks.html
The Metadata in PNG files: https://dev.exiv2.org/projects/exiv2/wiki/The_Metadata_in_PNG_files
metadata format
image with 300 dpi
{
"pHYs": {
"x": 30000,
"y": 30000,
"units": RESOLUTION_UNITS.INCHES
},
"tEXt": {
"Title": "Short (one line) title or caption for image",
"Author": "Name of image's creator",
"Description": "Description of image (possibly long)",
"Copyright": "Copyright notice",
"Software": "Software used to create the image",
"Disclaimer": "Legal disclaimer",
"Warning": "Warning of nature of content",
"Source": "Device used to create the image",
"Comment": "Miscellaneous comment"
}
}
writing metadata
writeMetadata(buffer, metadata);