Extracts width and height in pixels from an image blob.
If the image contains EXIF data indicating its angle is 90 or 270 degrees, its width and height are swapped for convenience.
Example:
ActiveStorage::Analyzer::ImageAnalyzer.new(blob).metadata
# => { width: 4104, height: 2736 }
This analyzer relies on the third-party MiniMagick gem. MiniMagick requires the ImageMagick system library.
Methods
Class Public methods
accept?(blob)
📝 Source code
# File activestorage/lib/active_storage/analyzer/image_analyzer.rb, line 16
def self.accept?(blob)
blob.image?
endInstance Public methods
metadata()
📝 Source code
# File activestorage/lib/active_storage/analyzer/image_analyzer.rb, line 20
def metadata
read_image do |image|
if rotated_image?(image)
{ width: image.height, height: image.width }
else
{ width: image.width, height: image.height }
end
end
rescue LoadError
logger.info "Skipping image analysis because the mini_magick gem isn't installed"
{}
end