private SimpleDateFormat getUnspecifiedTzDateFormat() {
            SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss", Locale.US);
            // As of Drew Noakes' metadata-extractor 2.8.1, unspecified
            // timezones are set to TimeZone.getTimeZone("GMT")
            df.setTimeZone(TimeZone.getTimeZone("GMT"));
            return df;
        }
Basic image properties for TIFF and JPEG, at least.
tika-parsers/tika-parsers-standard/tika-parsers-standard-modules/tika-parser-image-module/src/main/java/org/apache/tika/parser/image/ImageMetadataExtractor.java