Unable to create compatible TIFF
I need to create CCITT group 4 TIFF files for an external system. I have done this before, but this new system seems to bereally nitpicky. It refuses to use the TIFF produced by JAI no matter what I try, but if I save it in IrfanView it is accepted.
Can anybody give me some pointers to what I can change in the encoding process to make it compatible?
I used "tiffy" to view the metadata tags of the files, and here are the results:
The file produced by JAI:The file size is 20666 bytes.
Intel (little endian)byte order
IFD OFFSET = 8
The number of tags = 16
TagTypeLengthValue
256 Image WidthLONG12475(9ab Hex)
257 Image Length LONG13502(dae Hex)
258 Bits Per SampleSHORT11
259 CompressionSHORT14
262 PhotometricSHORT10
266 Fill OrderSHORT11
273 Strip Offsets LONG438<206>
274 OrientationSHORT11
277 Samples Per PixelSHORT11
278 Rows Per StripLONG18(8 Hex)
279 Strip Byte CountsLONG438<1958>
282 X Resolution RATIONAL 1<3710>300 / 1 = 300.000
283 Y Resolution RATIONAL 1<3718>300 / 1 = 300.000
284 Planar Configuration SHORT11
293 Group 4 OptionsLONG10(0 Hex)
296 Resolution UnitSHORT12
The file produced by IrfanView:The file size is 13388 bytes.
Intel (little endian)byte order
IFD OFFSET = 13164
The number of tags = 16
TagTypeLengthValue
256 Image WidthSHORT12475
257 Image Length SHORT13502
258 Bits Per SampleSHORT11
259 CompressionSHORT14
262 PhotometricSHORT10
266 Fill OrderSHORT11
273 Strip Offsets LONG18(8 Hex)
274 OrientationSHORT11
277 Samples Per PixelSHORT11
278 Rows Per StripSHORT13502
279 Strip Byte CountsLONG113155(3363 Hex)
282 X Resolution RATIONAL 1<13362> 629145600 / 2097152 = 300.000
283 Y Resolution RATIONAL 1<13370> 629145600 / 2097152 = 300.000
284 Planar Configuration SHORT11
296 Resolution UnitSHORT12
305 Software ASCII10<13378>IrfanView
There is a remarkable difference in size. Could this be it?
Or can the IFD offset be the problem?
Or the Strip offset/row/count?
Thanks in advance.
(I could make the TIFF available for download if it's helpful.)
