I converted a pdf with 8 pages to tiff,But I found that pages 3 to 8 were incorrect。I have uploaded my source code for your reference，and the source pdf file is ./bin/Debug/intput.pdf.
Pleasetake a look at my source code and see if I did anything wrong,Thanks a lot.
Note:Due to attachment size limitations，i have delete the file ‘Aspose.pdf.dll’,and the version of the dll i used is 220.127.116.11.if you want to run my demo application,please add the dll and a license to …/debug/bin
AsposeDemo.7z (7.5 MB)
Thanks for your reply.
As you said,i have tried change the value of brightness.and i found if the value is 0.1-0.4,those pages are black,and when the value is 0.5,then those pages are white;when the value is 0.6-1.0,those pages are black again.
So,1.which value you used? 2. must i use the version 21.6?
After i use your latest version（21.6），i can get the converted tiff as same as you sent to me.but i can not use our old license to use aspose.pdf.dll.i think this is a issue you already fixed after version 18.104.22.168,could you please tell me which version you fixed it?as our license just allows free upgrades until 26 Mar 2019。