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From Klearchos Klearchou <Klearchos.Klearc...@eurodyn.com>
Subject Re: Image Print size and quality
Date Tue, 24 Jan 2012 08:11:57 GMT
Hello Luis,

thank you very much for the workaround.
I will apply it now.

Kind regards,
Klearchos



On 24/1/2012 12:42 AM, Luis Bernardo wrote:
>
> There is indeed a strange bug with the stock FOP 1.0 (and in trunk 
> too...).
>
> Klearchos, if you set one of the dimensions to 90.01mm in the code 
> below then you get the behavior you want. An easy workaround for now.
>
> On 1/23/12 1:21 PM, Klearchos Klearchou wrote:
>> Pascal,
>>
>> I am using FOP 1.0 with:
>> Batik: 1.7+r608262
>> xmlgraphics-commons-1.4
>>
>> Thank you.
>>
>> On 23/1/2012 3:00 PM, Pascal Sancho wrote:
>>> Klearchos,
>>>
>>> I cannot reproduce what you get with the provided snippet: too small.
>>> What FOP version do you use?
>>>
>>> Le 23/01/2012 10:55, Klearchos Klearchou a écrit :
>>>> Hi Pascal,
>>>>
>>>> I copied some of the FO.
>>>> In case you want to see more please let me know.
>>>> This FO text is relevant to the image that renders bad (not scaled)
>>>>
>>>> ....
>>>> <fo:block start-indent="10px" font-size="8px" font-family="arial"/>
>>>> <fo:table width="100%" table-layout="fixed">
>>>> <fo:table-column column-width="proportional-column-width(1)"/>
>>>> <fo:table-body>
>>>> <fo:table-row keep-with-next="always">
>>>> <fo:table-cell>
>>>> <fo:block>
>>>> <fo:external-graphic content-height="scale-to-fit"
>>>> block-progression-dimension.maximum="90mm" 
>>>> content-width="scale-to-fit"
>>>> inline-progression-dimension.maximum="90mm" border="solid 3px #8CE18D"
>>>> src="c:/tempUnzip\images\image_21952"/>
>>>> </fo:block>
>>>> <fo:block space-before="3mm"/>
>>>> </fo:table-cell>
>>>> </fo:table-row>
>>>> ...
>>>>
>>>> So in case I haven't described well enough the problem I will try 
>>>> again:
>>>> There is a rectangle image  (300 * 300) that overflows out of the 
>>>> max area.
>>>> If I change the size of the same image to 310 * 300 or 300 * 310, then
>>>> the image renders ok.
>>>>
>>>> Please let me know if you need more info.
>>>> Thank you.
>>>>
>>>>
>>>> On 23/1/2012 11:08 AM, Pascal Sancho wrote:
>>>>> Hi,
>>>>>
>>>>> can you provide a short XSL-FO (not XSLT) with equivalent images that
>>>>> reproduce what you describe here, I cannot figure what you say.
>>>>>
>>>>> Le 20/01/2012 16:29, Klearchos Klearchou a écrit :
>>>>>> Hello Pascal,
>>>>>>
>>>>>> the solution that we talked about works well almost in all cases.
>>>>>> Here is the code:
>>>>>> <fo:external-graphic src="{$imageLink}" border="solid 3px #8CE18D"
>>>>>>
>>>>>> inline-progression-dimension.maximum="{$imageMaxBoundary}"
>>>>>>                                    content-width="scale-to-fit"
>>>>>>
>>>>>> block-progression-dimension.maximum="{$imageMaxBoundary}"
>>>>>>                                    content-height="scale-to-fit"
>>>>>>                                />
>>>>>>
>>>>>> Now when the image is rectangle the scale does not work.
>>>>>> I am attaching an image, on the left hand side the image is 310 x

>>>>>> 300
>>>>>> and FOP scales it well.
>>>>>> On the right hand side is the same image but 300 x 300. As you 
>>>>>> can see
>>>>>> FOP fails to scale it.
>>>>>> It overflows out of the box.
>>>>>>
>>>>>> Do you have any idea what it could be?
>>>>>>
>>>>>> Thank you in advance
>>>>>>
>>>>>>
>>>>>> On 1/17/2012 5:47 PM, Pascal Sancho wrote:
>>>>>>> We use imageMagik
>>>>>>>
>>>>>>> Le 17/01/2012 15:32, Klearchos Klearchou a écrit :
>>>>>>>> Pascal,
>>>>>>>>
>>>>>>>> the information that you provide are valuable.
>>>>>>>> Can you propose any open source library in order to manipulate
the
>>>>>>>> quality/resolution of the image?
>>>>>>>> I tried the imgscalr, getScaledInstance(), Thumbnailator
and 
>>>>>>>> some more
>>>>>>>> but they do not provide em exactly what I want.
>>>>>>>> I haven't tried yet JMajick.
>>>>>>>>
>>>>>>>> Thanks again.
>>>>>>>>
>>>>>>>>
>>>>>>>> On 1/17/2012 4:18 PM, Pascal Sancho wrote:
>>>>>>>>> Quality loss may depend on PDF viewer settings and capabilities
>>>>>>>>>        (anti-aliasing, zoom factor, etc.)
>>>>>>>>> Also, the result can seem better if you first resample
your 
>>>>>>>>> image before
>>>>>>>>> using in PDF, to get the best fit on screen reading,
but can 
>>>>>>>>> become
>>>>>>>>> worse on printing.
>>>>>>>>>
>>>>>>>>> Depending on what usages your PDF are for (reading on
screen, 
>>>>>>>>> Laser
>>>>>>>>> printing, Offset printing, low weight downloading, etc.)
>>>>>>>>> There is no perfect solution there.
>>>>>>>>>
>>>>>>>>> For example, we (my compagny) produce images with different
>>>>>>>>> quality/resolution for identified purposes, and generate
as 
>>>>>>>>> many PDF files.
>>>>>>>>>
>>>>>>>>> The only constant over various resampled images is the
real size:
>>>>>>>>> for instance, a square image (1"x1") will give:
>>>>>>>>> 96x96, rez 1/96" for screen reading;
>>>>>>>>> 300x300, rez 1/300" for Laser printing;
>>>>>>>>> 120x120, rez 1/120" for Dowload _and_print;
>>>>>>>>> etc.
>>>>>>>>>
>>>>>>>>> Le 17/01/2012 14:48, Klearchos Klearchou a écrit :
>>>>>>>>>> Hi Pascal,
>>>>>>>>>>
>>>>>>>>>> yes indeed this was one of my problems.
>>>>>>>>>> I will test it to see the results.
>>>>>>>>>>
>>>>>>>>>> In case I will still have to manipulate the image
outside of 
>>>>>>>>>> the FOP do
>>>>>>>>>> you have any solution to propose regarding:
>>>>>>>>>> How to change the print size of the image (like gimp)
in 
>>>>>>>>>> order not to
>>>>>>>>>> loose image quality and at the same time to show
it smaller 
>>>>>>>>>> inside the PDF.
>>>>>>>>>>
>>>>>>>>>> Thank you.
>>>>>>>>>>
>>>>>>>>>> On 17/1/2012 3:42 PM, Pascal Sancho wrote:
>>>>>>>>>>> Hi,
>>>>>>>>>>>
>>>>>>>>>>> I guess that by "the result is problematic with
very tall 
>>>>>>>>>>> images" you
>>>>>>>>>>> mean that image can overflow the page when h/w
ratio is too 
>>>>>>>>>>> high.
>>>>>>>>>>>
>>>>>>>>>>> If this is the case, you can use "max-height"
XSL-FO 
>>>>>>>>>>> equivalent:
>>>>>>>>>>>
>>>>>>>>>>> <fo:external-graphic src="{$imageUrl}"
>>>>>>>>>>>          
>>>>>>>>>>> block-progression-dimension.optimum="$my_minimal_height"
>>>>>>>>>>>          
>>>>>>>>>>> block-progression-dimension.maximum="$my_maximal_height"
>>>>>>>>>>>          content-height="scale-to-fit"/>
>>>>>>>>>>>
>>>>>>>>>>> Le 17/01/2012 12:17, Klearchos Klearchou a écrit
:
>>>>>>>>>>>> Dear FOP users,
>>>>>>>>>>>>
>>>>>>>>>>>> I want to change an image's print size in
order to add it 
>>>>>>>>>>>> inside a PDF.
>>>>>>>>>>>> I want to do this in order not to loose any
quality.
>>>>>>>>>>>> The image must look smaller inside the PDF
but the quality 
>>>>>>>>>>>> should be the
>>>>>>>>>>>> same with the original image.
>>>>>>>>>>>>
>>>>>>>>>>>> I know that I could do something like this
in my XSLT
>>>>>>>>>>>> (content-width="scale-to-fit"):
>>>>>>>>>>>>
>>>>>>>>>>>> <fo:external-graphic src="url('{$imageLink}')"
>>>>>>>>>>>> content-width="scale-to-fit" border="solid
0.1pt" 
>>>>>>>>>>>> width="90mm" />
>>>>>>>>>>>> <fo:block space-before="{$space}"/>
>>>>>>>>>>>>                                         
 (<xsl:value-of 
>>>>>>>>>>>> select="$title"/>)
>>>>>>>>>>>> <fo:block/>
>>>>>>>>>>>> <xsl:value-of select="$description"/>
>>>>>>>>>>>> </fo:block>
>>>>>>>>>>>>
>>>>>>>>>>>> but the result is problematic with very tall
images.
>>>>>>>>>>>>
>>>>>>>>>>>> Thus I thought that I should manipulate the
image before 
>>>>>>>>>>>> passing it to FOP.
>>>>>>>>>>>> I used GIMP and I saw that if I change the
print size of 
>>>>>>>>>>>> the image FOP
>>>>>>>>>>>> uses this size and the quality of the image
is very good.
>>>>>>>>>>>>
>>>>>>>>>>>> Anybody knows how to solve this problem?
>>>>>>>>>>>>
>>>>>>>>>>>> Thank you in advance.
>>
>>
>>
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>
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