Hi Tran Cuong,
Thanks for contacting support.
I have tested the scenario using Aspose.Pdf for Java 9.5.2 in Eclipse Juno application running over Windows 7 (x64) with JDK 1.7 and I am unable to notice any issue in resultant image. As per my understanding, you are facing issue while converting PDF pages to Image using Google Chrome. However in our forums, we provide technical support regarding issues which sometimes occur while using our API’s in various scenarios.
We recommend you to please try using our API as it provides very simple approach for converting PDF pages to Image format and no issue occurs in resultant image file. For your reference, I have also attached the image file generated over my end.
// Open source PDF document<o:p></o:p>
com.aspose.pdf.Document pdfDocument = new com.aspose.pdf.Document("c:/pdftest/HR-Portal+ENGLISH.pdf");
// create Jpeg Device instance
// convert first page of PDF to