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ASF GitHub Bot commented on TIKA-2630: -------------------------------------- dameikle commented on issue #255: TIKA-2630: Wrong height and width metadata for JPEG images URL: https://github.com/apache/tika/pull/255#issuecomment-434131434 Hey @tballison - given the key name clashes for the Exif metadata I am proposing to add the directory name as the qualifier, hence the request for a review. I was tempted to do this for all directories to make it clean but worry about downstream code that rely on the current values in 1.x stream. I also thought about not doing it, but without doing it for at least Exif, we will continue to give the wrong value here without some logic to have a key hierarchy in CopyUnknownFieldsHandler. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org > Wrong height and width metadata for JPEG images > ----------------------------------------------- > > Key: TIKA-2630 > URL: https://issues.apache.org/jira/browse/TIKA-2630 > Project: Tika > Issue Type: Bug > Components: parser > Affects Versions: 1.17 > Reporter: Ancuta Morarasu > Assignee: Dave Meikle > Priority: Major > Attachments: Tika-metadata.txt, metadata-exctractor-metadata.txt, > sizesampleissue.jpg > > > According to [Exif > specs|http://www.exif.org/Exif2-2.PDF#page=73&zoom=auto,-176,103], for > compressed images the values for width and height should come from the tags: > * *PixelXDimension* mapped in metadata-extractor to > {{com.drew.metadata.Directory.ExifDirectoryBase.TAG_EXIF_IMAGE_WIDTH}} and > * *PixelYDimension* mapped to {{ExifDirectoryBase.TAG_EXIF_IMAGE_HEIGHT}}. > {{ImageMetadataExtractor$ExifHandler.[handlePhotoTags(...)|https://github.com/apache/tika/blob/master/tika-parsers/src/main/java/org/apache/tika/parser/image/ImageMetadataExtractor.java#L487]}} > should extract and set these in the metadata: > {code:java} > if (directory.containsTag(ExifSubIFDDirectory.TAG_EXIF_IMAGE_WIDTH)) { > metadata.set(Metadata.IMAGE_WIDTH, > > trimPixels(directory.getDescription(ExifSubIFDDirectory.TAG_EXIF_IMAGE_WIDTH))); > } > if (directory.containsTag(ExifSubIFDDirectory.TAG_EXIF_IMAGE_WIDTH)) { > metadata.set(Metadata.IMAGE_LENGTH, > > trimPixels(directory.getDescription(ExifSubIFDDirectory.TAG_EXIF_IMAGE_HEIGHT))); > } > {code} > Also the {{CopyUnknownFieldsHandler}} overrides the values for "Image Width" > ({{JpegDirectory.TAG_IMAGE_WIDTH}}) and "Image Height" > ({{JpegDirectory.TAG_IMAGE_HEIGHT}}) with the values from > {{ExifIFD0Descriptor.TAG_IMAGE_WIDTH}} and > {{ExifIFD0Descriptor.TAG_IMAGE_HEIGHT}} because they have the same tag name. > I attached a sample image, these are the metadata values: > * extracted by metadata-extractor: > [JPEG] Image Height = 367 pixels > [JPEG] Image Width = 1535 pixels > [Exif IFD0] Image Width = 2173 pixels > [Exif IFD0] Image Height = 520 pixels > [Exif SubIFD] Exif Image Width = 1535 pixels > [Exif SubIFD] Exif Image Height = 367 pixels > * Tika metadata: > Image Height: 520 pixels > Image Width: 2173 pixels > tiff:ImageLength: 520 > tiff:ImageWidth: 2173 > Exif Image Height: 367 pixels > Exif Image Width: 1535 pixels -- This message was sent by Atlassian JIRA (v7.6.3#76005)