[IMAGING-42] Sanselan 0.97 can't read TIFF file without tag "Samples Per Pixel"

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.97
• Fix Version/s: 1.0-alpha1
• Component/s: Format: TIFF

Environment

Any

• Assignee: Unassigned
• Reporter: VVD
• Created: 01/Mar/12 17:57
• Updated: 07/Aug/20 04:32
• Resolved: 01/Mar/12 18:43

Description

Test.java

package test;
import ...;
public class Test {
	public static void main	(String[] args) {
		File fin = new File("/file.tif");
		File fout = new File("/file.png");
		try {
			Map params = new Hashtable();
			BufferedImage image = Sanselan.getBufferedImage(fin);
			Sanselan.writeImage(image, fout, ImageFormat.IMAGE_FORMAT_PNG, new Hashtable());
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
}

org.apache.sanselan.ImageReadException: Missing expected field: 277 (0x115: Samples Per Pixel):
at org.apache.sanselan.formats.tiff.TiffDirectory.findField(TiffDirectory.java:186)
at org.apache.sanselan.formats.tiff.TiffImageParser.getBufferedImage(TiffImageParser.java:463)
at org.apache.sanselan.formats.tiff.TiffDirectory.getTiffImage(TiffDirectory.java:163)
at org.apache.sanselan.formats.tiff.TiffImageParser.getBufferedImage(TiffImageParser.java:441)
at org.apache.sanselan.Sanselan.getBufferedImage(Sanselan.java:1264)
at org.apache.sanselan.Sanselan.getBufferedImage(Sanselan.java:1231)
at test.Test.main(Test.java:24)

24 is line: "BufferedImage image = Sanselan.getBufferedImage(fin);"

I look at sources and see that TIFF_TAG_SAMPLES_PER_PIXEL is mandatory tag:
"int samplesPerPixel = directory.findField(TIFF_TAG_SAMPLES_PER_PIXEL, true).getIntValue();"
Why?

ImageMagick simple show warning and convert it correctly:
Unknown field with tag 32309 (0x7e35) encountered. `TIFFReadDirectory' @ warning/tiff.c/TIFFWarnings/761.
Unknown field with tag 32950 (0x80b6) encountered. `TIFFReadDirectory' @ warning/tiff.c/TIFFWarnings/761.
KDE applications (gwenview, okular, kolourpaint) show warning and open too:
TIFFReadDirectory: Warning, Unknown field with tag 32309 (0x7e35) encountered.
TIFFReadDirectory: Warning, Unknown field with tag 32950 (0x80b6) encountered.

Do I need to check not released versions (from sources)?

Also TIFF compression 4 isn't supported, but I saw Issue that Sanselat 1.0 is support it, but 1.0 isn't released yet.