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From Tilman Hausherr <THaush...@t-online.de>
Subject Re: 答复: Signature lost when converted from PDF to jpg
Date Wed, 20 Sep 2017 15:45:12 GMT
What output do you get in your application when you run these code lines 
before doing the rendering?

System.out.println(Arrays.toString(ImageIO.getReaderFormatNames()));
Logger.getLogger("huhu").log(Level.SEVERE, "error");
Logger.getLogger("huhu").log(Level.WARNING, "warn");
Logger.getLogger("huhu").log(Level.INFO, "info");


Tilman



Am 20.09.2017 um 09:52 schrieb YE ...:
> Hi, Tilman,
>
> Thanks for the advice.
>
> Yes I have installed the jar in class path. And I checked log and didn’t find the message.
>
>
> -----邮件原件-----
> 发件人: Tilman Hausherr [mailto:THausherr@t-online.de]
> 发送时间: 2017年9月20日 14:51
> 收件人: users@pdfbox.apache.org
> 主题: Re: Signature lost when converted from PDF to jpg
>
> Hi,
>
> I can display it. Did you get a log message like this?
>
> Cannot read JPEG2000 image: Java Advanced Imaging (JAI) Image I/O Tools are not installed
>
> Please read
> https://pdfbox.apache.org/2.0/dependencies.html
>
> The link to jai is broken... it's either a file named jai_imageio.jar that you have somewhere,
or http://www.oracle.com/technetwork/java/javasebusiness/downloads/java-archive-downloads-java-client-419417.html
> , or the files from
> https://github.com/jai-imageio/jai-imageio-core
> https://github.com/jai-imageio/jai-imageio-jpeg2000
>
> Tilman
>
>
> Am 20.09.2017 um 08:40 schrieb YE ...:
>> Sorry. My mistake.
>>
>>
>> Here are the correct links:
>>
>> PDF:
>>
>> https://shujubiji.cn/uppv/bjPhoto/d5418a966daecda62bcf056ddc1e79c99a4c
>> 6546/1505873304680/original_with_signature.pdf?zid=__itemtoken__ca7e30
>> b40bc13a74fcc7765a59c9411c1215c2e8
>>
>> Converted JPG:
>>
>> https://shujubiji.cn/uppv/bjPhoto/d5418a966daecda62bcf056ddc1e79c99a4c
>> 6546/1505873315791/converted_with_no_signature.jpg?zid=__itemtoken__3f
>> 1caa712e322f4ae4fa483fdd2089d341ff7ba9
>>
>> And yes I am using 2.0.7.
>>
>> Regards,
>> Ye
>>
>> ________________________________
>> From: Tilman Hausherr <THausherr@t-online.de>
>> Sent: Wednesday, September 20, 2017 6:31 AM
>> To: users@pdfbox.apache.org
>> Subject: Re: Signature lost when converted from PDF to jpg
>>
>> Hi,
>> You posted the same URL twice. So we can see but not the PDF. Please
>> mention the version you are using (hopefully 2.0.7).
>> Tilman
>>
>> Am 20.09.2017 um 04:09 schrieb YE ...:
>>> Hi, I am using pdfbox to convert PDF to jpgs.
>>>
>>>
>>> I have a case that the original PDF has signature but when converted to PDF the
signature is lost.
>>>
>>>
>>> Is there any special setting for exporting signature?
>>>
>>>
>>> Original PDF:
>>>
>>> https://shujubiji.cn/share/repositories?id=AV6dC1CSCNMzogJYCA5Q&token
>>> =__itemtoken__3f1caa712e322f4ae4fa483fdd2089d341ff7ba9
>> 图片化数字资产管理,pdf转jpg,ppt/doc转jpg保存和发布,专业文档/图库/视频库的最佳选择<https://shujubiji.
>> cn/share/repositories?id=AV6dC1CSCNMzogJYCA5Q&token=__itemtoken__3f1ca
>> a712e322f4ae4fa483fdd2089d341ff7ba9>
>> shujubiji.cn
>> 数据笔记是一个内容图片化数字资产管理平台。pdf转jpg doc转jpg
docx转jpg ppt转jpg
>> pptx转jpg图片是互联网时代最佳展现方式。除了直接管理图片资产以外,数据笔记对视频自动截屏,将Word/PPT/pdf转jpg转换,让内
>> 容在任何时候,任何平台上,随时可见。
>>
>>
>>
>>>
>>> Converted:
>>>
>>> https://shujubiji.cn/share/repositories?id=AV6dC1CSCNMzogJYCA5Q&token
>>> =__itemtoken__3f1caa712e322f4ae4fa483fdd2089d341ff7ba9
>> 图片化数字资产管理,pdf转jpg,ppt/doc转jpg保存和发布,专业文档/图库/视频库的最佳选择<https://shujubiji.
>> cn/share/repositories?id=AV6dC1CSCNMzogJYCA5Q&token=__itemtoken__3f1ca
>> a712e322f4ae4fa483fdd2089d341ff7ba9>
>> shujubiji.cn
>> 数据笔记是一个内容图片化数字资产管理平台。pdf转jpg doc转jpg
docx转jpg ppt转jpg
>> pptx转jpg图片是互联网时代最佳展现方式。除了直接管理图片资产以外,数据笔记对视频自动截屏,将Word/PPT/pdf转jpg转换,让内
>> 容在任何时候,任何平台上,随时可见。
>>
>>
>>
>>>
>>> My code is very simple:
>>>
>>>
>>> pdfRenderer = new PDFRenderer(document)
>>>
>>>
>>> pdfRenderer.renderImageWithDPI(page, DPI, ImageType.RGB)
>>>
>>>
>>> Thanks
>>>
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