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Re: Compress a multipage tiff Started by wilxom at 01-29-2008 2:11. Topic has 7 replies. LEAD Support Fo... » Developer » Image Compressi... » Re: Compress a multipage tiff

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01-29-2008, 2:11 wilxom Joined on 01-09-2008 Posts 15 Compress a multipage tiff Hi, I'm using LeadTools 14.0 COM to develop a small program which insert multiple images (JPG & TIFF) into a multipage tiff file. For JPG images, I will need to use a compression named "JPEG Original Tiff 6.0 spec" while for TIFF images will need "Group 4 Fax (aka CCITT Fax4). In this case, what is the available compression type available for me to achieve this. Thanks in advanced. Regards, Wilson    Report

01-29-2008, 5:31 Maen Hasan Joined on 08-05-2004 Posts 1,715 Re: Compress a multipage tiff Hello, To save TIF Files with JPEG compression, try to use the FILE_TIF_JPEG constant with the Save method. To save TIF Files compressed using CCITT group4, try to use FILE_CCITT_GROUP4 constant. Thanks, Maen Badwan LEADTOOLS Technical Support    Report

01-30-2008, 8:14 wilxom Joined on 01-09-2008 Posts 15 Re: Compress a multipage tiff Hi, Thanks for the reply. By the way, i manage to solved the TIFF compression problem. But i still having problem with the JPEG compression as an error prompted out "Invalid QFactor specified". Below was my code: RasterIO.Save rasterImage, strDir & strName, FILE_TIF_JPEG, 8, nCount, SAVE_APPEND I'm using 8 bit (Greyscale) and above code for 2nd image added to the multipage tiff. Please assist. Thanks. Regards, Wilson    Report

01-31-2008, 7:23 Maen Hasan Joined on 08-05-2004 Posts 1,715 Re: Compress a multipage tiff Hello, The problem might be related to the value of the Quality Factor that you use when saving the file. Try to save the file as follows: RasterIO.Save rasterImage, strDir & strName, FILE_TIF_JPEG, 8, 2, SAVE_APPEND Please let me know if this helps. Thanks, Maen Badwan LEADTOOLS Technical Support    Report

01-31-2008, 8:19 wilxom Joined on 01-09-2008 Posts 15 Re: Compress a multipage tiff Hi, I manage to compress the JPEG file successfully. By the way, i found that the compression available was new compression for JPEG. I had tried below compression method: i. FILE_TIF_JPEG ii. FILE_TIF_JPEG_411 iii. FILE_TIF_JPEG_422 iv. FILE_TIF_J2K I need an old JPEG compression to compress my images to the size below 50 kb. The compression needed was "JPEG original TIFF 6.0 spec". Thanks for your assistance. Regards, Wilson    Report

01-31-2008, 8:29 Maen Hasan Joined on 08-05-2004 Posts 1,715 Re: Compress a multipage tiff Hello, To save old JTIF files, try to set the RasterIO.SaveOldJTIF property to True before saving the file. Thanks, Maen Badwan LEADTOOLS Technical Support    Report

01-31-2008, 9:02 wilxom Joined on 01-09-2008 Posts 15 Re: Compress a multipage tiff Hi, I try the below 2 options but both in return with invalid properties used. Option 1: RasterIO.SaveOldJTIF = True RasterIO.SaveOldJTIF rasterImage, strDir & strName, FILE_TIF_JPEG, 8, 1, SAVE_OVERWRITE Option 2: RasterIO.SaveOldJTIF = True RasterIO.Save rasterImage, strDir & strName, FILE_TIF_JPEG, 8, 1, SAVE_OVERWRITE Just for enquiry, am i using the wrong command. Please assist. Thanks. Regards, Wilson    Report

01-31-2008, 12:12 Maen Hasan Joined on 08-05-2004 Posts 1,715 Re: Compress a multipage tiff Wilson, You should use the Save method, but you are passing a wrong value in Quality Factor parameter. You should not pass 1, but a value between 2 and 255. Please read the help topic "Compression Quality Factors" in our Main Raster COM help file. Thanks, Maen Badwan LEADTOOLS Technical Support    Report

LEAD Support Fo... » Developer » Image Compressi... » Re: Compress a multipage tiff

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