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From Klearchos Klearchou <Klearchos.Klearc...@eurodyn.com>
Subject Re: Image Print size and quality
Date Mon, 23 Jan 2012 13:21:56 GMT
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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