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From Tilman Hausherr <THaush...@t-online.de>
Subject Re: Fwd: Re: pdf shows as very pixelated
Date Wed, 20 Sep 2017 16:21:18 GMT
Hi,

Maybe explain what your "program" is. Explain the whole sequence from 
start to finish. PDFBox doesn't reduce image quality if you just loaded 
and saved a PDF.

Could it be that you created an image from a PDF, then created a PDF 
from this image? If yes, then take care to render at a good dpi the 
first time.

Tilman

Am 20.09.2017 um 18:12 schrieb gerryw@hispeed.ch:
>
> Hi
>
> My PDF is the result of loading it into my program and then saving it 
> with the program. When I use document viewer it is clear, it is only 
> when I put it through my program that the file size is reduced from 
> 1.2mB to 532.4kB ?
>
> Gerry
>
>
>
> -------- Forwarded Message --------
> Subject: 	Re: pdf shows as very pixelated
> Date: 	Wed, 20 Sep 2017 17:54:06 +0200
> From: 	Tilman Hausherr <THausherr@t-online.de>
> Reply-To: 	users@pdfbox.apache.org
> To: 	users@pdfbox.apache.org
>
>
>
> Hi,
>
> Your PDF is made from a low resolution scan, or from a hires image 
> that was reduced poorly. It looks bad even with Adobe Reader. The size 
> of the image within the PDF is 842 x 595. A good scan (300dpi) is 3508 
> x 2480 pixels.
>
> Tilman
>
>
>
>
>
> Am 20.09.2017 um 17:42 schrieb gerryw@hispeed.ch:
>> Hi
>>
>> The link to my pdf is:
>>
>> http://www116.zippyshare.com/v/WdY6AYy7/file.html
>>
>> Regards
>>
>> Gerry
>>
>>
>> On 20.09.2017 17:27, Tilman Hausherr wrote:
>>> Hi,
>>>
>>> http://filedropper.com/
>>>
>>> Tilman
>>>
>>> PS: please keep it on list. This is a recent flaw in thunderbird, 
>>> get the "reply to list" icon.
>>>
>>> Am 20.09.2017 um 17:22 schrieb gerryw@hispeed.ch:
>>>> Hi Tilman
>>>>
>>>> Thanks for your quick reply.
>>>>
>>>> Could you please give me the name of a Sharehoster you like to use 
>>>> and I will post a pdf on there.
>>>>
>>>> Thanks
>>>>
>>>> Gerry
>>>>
>>>>
>>>> On 19.09.2017 18:11, Tilman Hausherr wrote:
>>>>> Hi,
>>>>> Please try again with 2.0.7. If it doesn't work as wished, please 
>>>>> upload the PDF to a sharehoster.
>>>>> Tilman
>>>>>
>>>>> Am 19.09.2017 um 17:44 schrieb Gerry:
>>>>>> Hi
>>>>>>
>>>>>> I am using pdfbox-app-2.0.0 in my program.
>>>>>>
>>>>>> I am using the following code:
>>>>>>
>>>>>> public JPanel makeDocument() throws IOException, 
>>>>>> FileNotFoundException{
>>>>>>
>>>>>>         File target = new File(filePath);
>>>>>>
>>>>>>         PDDocument pddocument = PDDocument.load(target);
>>>>>>
>>>>>>          JPanel displayView;
>>>>>>
>>>>>>           PDFRenderer pdfrend = new PDFRenderer(pddocument);
>>>>>>
>>>>>>
>>>>>>             for (int i = 0; i < pddocument.getNumberOfPages();
i 
>>>>>> ++){
>>>>>>
>>>>>>                 //BufferedImage pageImage = 
>>>>>> pdfrend.renderImage(i,0.9f);
>>>>>>                 BufferedImage pageImage = 
>>>>>> pdfrend.renderImageWithDPI(i,300);
>>>>>>
>>>>>>                 this.docList.add(pageImage);
>>>>>>             }
>>>>>>
>>>>>>
>>>>>>
>>>>>>             displayProcessing = new DisplayDocs2(this.docList);
>>>>>>
>>>>>>             displayView = displayProcessing.getPanel();
>>>>>>
>>>>>>           pddocument.close();
>>>>>>
>>>>>>         return displayView;
>>>>>>
>>>>>>     }
>>>>>>
>>>>>> when I use this code to open a computer produced pdf (with a 
>>>>>> white background) it works fine.
>>>>>>
>>>>>> But when I try to open a pdf which was a scanned page it come out

>>>>>> pixelated and pretty much unreadable like grey instead of white 
>>>>>> background has an effect.
>>>>>>
>>>>>> Any help gratefully received. Sorry for my bad descriptive skills

>>>>>> I am learning as I go.
>>>>>>
>>>>>> Gerry
>>>>>>
>>>>>>
>>>>>>
>>>>>> ---------------------------------------------------------------------

>>>>>>
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>>>>>> For additional commands, e-mail: users-help@pdfbox.apache.org
>>>>>>
>>>>>
>>>>>
>>>>> ---------------------------------------------------------------------
>>>>> To unsubscribe, e-mail: users-unsubscribe@pdfbox.apache.org
>>>>> For additional commands, e-mail: users-help@pdfbox.apache.org
>>>>>
>>>>
>>>
>>
>>
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>>
>


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