public double getDoubleValue() throws ImagingException {
        final Object o = getValue();
        if (o == null) {
            throw new ImagingException("Missing value: " + getTagInfo().getDescription());
        }

        return ((Number) o).doubleValue();
    }
Returns the field's count, derived from bytes 4-7.

@return the count
src/main/java/org/apache/commons/imaging/formats/tiff/TiffField.java