[gradsusr] High resolution images problem

Sat Jun 6 13:59:10 EDT 2015

Mark,
that sounds like a good suggestion too!
Thank you very much.

Júlio B. Chiquetto,

Doutorando em Climatologia
USP - Geografia Física

PhD Student in Climatology
University of Sao Paulo - Physical Geography

On 5 June 2015 at 15:40, Mark Sponsler <msponsler at comcast.net> wrote:

> One other thing I've found with text in printim using .png format:
> Sometimes there is still some funky thing going on if text size is small
> such that the text isn't quite as clear/readable as one would expect.
>
> If you reposition the text just an extra 0.01 inch (or so) left, right or
> up/down, it becomes much sharper. Just play with it some.
>
> On June 5, 2015 11:01:02 AM PDT, "Júlio Barboza Chiquetto" <
> julio22 at gmail.com> wrote:
>
>> Hello Eric,
>> thanks so much for the valuable feedback!
>> Best regards,
>>
>> Júlio B. Chiquetto,
>>
>> Doutorando em Climatologia
>> USP - Geografia Física
>>
>> PhD Student in Climatology
>> University of Sao Paulo - Physical Geography
>>
>> On 5 June 2015 at 14:16, Eric Altshuler <ela at cola.iges.org> wrote:
>>
>>> Hello Julio,
>>>
>>> I would also suggest you use PNG (the default image format for printim)
>>> or GIF. Both of these formats use lossless compression. JPG is lossy, and
>>> is intended for images with many colors (thousands or more) and without
>>> text or sharp borders between colors. When zooming in on the high
>>> resolution image, significant distortion is present. Since your images have
>>> a small number of colors, text, and abrupt transitions between colors, you
>>> should use PNG or GIF. JPG does not handle this type of image well.
>>>
>>> Best regards,
>>>
>>> Eric L. Altshuler
>>> Research Scientist
>>> Center for Ocean-Land-Atmosphere Studies
>>> 253 Research Hall, Mail Stop 6C5
>>> George Mason University
>>> 4400 University Drive
>>> Fairfax, VA 22030 USA
>>>
>>> E-mail: ela at cola.iges.org
>>> Phone: (703) 993-5725
>>> Fax: (703) 993-5770
>>>
>>>
>>> ------------------------------
>>> *From: *"Júlio Barboza Chiquetto" <julio22 at gmail.com>
>>> *To: *"GrADS Users Forum" <gradsusr at gradsusr.org>
>>> *Sent: *Thursday, June 4, 2015 11:39:27 PM
>>> *Subject: *Re: [gradsusr] High resolution images problem
>>>
>>>
>>> Jeff,
>>> thank you for clarifying, I will follow your suggestion then.
>>> Kind regards,
>>>
>>> Júlio B. Chiquetto,
>>>
>>> Doutorando em Climatologia
>>> USP - Geografia Física
>>>
>>> PhD Student in Climatology
>>> University of Sao Paulo - Physical Geography
>>>
>>> On 4 June 2015 at 23:20, Jeff Duda <jeffduda319 at gmail.com> wrote:
>>>
>>>> I think the number of pixels used for fonts scales differently with
>>>> changing image size. Just increase the font thickness and/or size to
>>>> improve readability.
>>>>
>>>> Jeff Duda
>>>>
>>>> On Thu, Jun 4, 2015 at 5:59 PM, Júlio Barboza Chiquetto <
>>>> julio22 at gmail.com> wrote:
>>>>
>>>>> Hello all,
>>>>> I've had some problems generating high-resolution images with printim
>>>>> (I am using ! version 2.0).
>>>>> It seems that, with, a white background, the text gets somehow fainter.
>>>>> The more pixels I used in the commands, the more the text faded.
>>>>> For these images I used:
>>>>> printim image1.jpg x5000 y5000 white
>>>>> printim image2.jpg x500 y500 white
>>>>>
>>>>> For image 2, I used 10x less pixels but the text is much clearer to
>>>>> read.
>>>>> There must be something obvious I am missing here, but I am afraid I
>>>>> don't know much about digital images.
>>>>>
>>>>> I suppose I could change x and y axis fonts thickness and size, but I
>>>>> am not sure it would work.
>>>>> Anyway, I don't understand why this happens and am looking for a
>>>>> reasonable solution.
>>>>>
>>>>> Kind regards,
>>>>>
>>>>> Júlio B. Chiquetto,
>>>>>
>>>>> Doutorando em Climatologia
>>>>> USP - Geografia Física
>>>>>
>>>>> PhD Student in Climatology
>>>>> University of Sao Paulo - Physical Geography
>>>>>
>>>>> _______________________________________________
>>>>> gradsusr mailing list
>>>>> gradsusr at gradsusr.org
>>>>> http://gradsusr.org/mailman/listinfo/gradsusr
>>>>>
>>>>>
>>>>
>>>>
>>>> --
>>>> Jeff Duda
>>>> Graduate research assistant
>>>> University of Oklahoma School of Meteorology
>>>> Center for Analysis and Prediction of Storms
>>>>
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>>>> http://gradsusr.org/mailman/listinfo/gradsusr
>>>>
>>>>
>>>
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>> ------------------------------
>>
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>>
> Thanks,
> Mark Sponsler
>
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