Piwigo.org

ttt · 2015-02-12 10:32:40

Hello/Hi/Greetings,

i found that the image quality is bad,
i upload 2048px wide photo to piwigo, but the output seem worse than my facebook quality...

may i know HOW TO make sure the -BEST- image quality ?
correct upload method ?
suggested photo size ?

Please help, as i want to make sure my website having the best photo quality.

Thank you
Regards,

Piwigo version:
PHP version:
MySQL version:
Piwigo URL: http://eaeastudio.com/gallery/

flop25 · 2015-02-12 11:56:53

Hello
could you be more precise: what criterias of quality are you talking? do you talk about the resized pictures? etc
if you're really a photographer you should come with precise vocabulary and analysis

ttt · 2015-02-12 13:08:00

Thank you for prompt reply.

The Sharpness is reduced.
below links for your comparison

1.
https://www.facebook.com/photo.php?fbid … mp;theater

2.
http://eaeastudio.com/gallery/picture.p … category/3

Thank you
Regards,

flop25 · 2015-02-12 13:16:58

that's an option on Option->Size admin page

homdax · 2015-02-12 13:52:31

That is only for size, not for image quality. Please elaborate on how you correlate size with quality?

sport · 2015-02-12 13:54:33

Last edited by sport (2015-02-12 13:54:52)

homdax · 2015-02-12 13:56:22

ok?

Wait, "show details". Found it, far to the right.

But where do you guys get those default values from? They are not 3:4 standards, not even 16:9 or 16:10 or anything I have seen before?

http://en.wikipedia.org/wiki/Computer_d … dards2.svg

Last edited by homdax (2015-02-12 14:00:55)

flop25 · 2015-02-12 14:07:56

did you update from a previous piwigo version which were not using auto generation? because values can be calculated from that

homdax · 2015-02-12 14:09:57

No it is a default setup from scratch.

Image size auto generation could of course explain it somewhat.

Piwigo version: 2.7.3
PHP: 5.2.42-servage30 (Show info) [2015-02-03 08:16:47]
MySQL: 5.0.85-log [2015-02-03 08:34:24]
Graphics Library: External ImageMagick 6.7.8-7
Piwigo URL: http://homeworldshots.net/_piwigo/

flop25 · 2015-02-12 14:14:36

ok ; no that's the default values, i've just checked the files
http://piwigo.org/dev/browser/trunk/inc … c.php#L221
I notify rvelices who has a better knowledge

homdax · 2015-02-12 14:18:13

So this:

Code:

IMG_SQUARE => new DerivativeParams( SizingParams::square(120,120) ),
222        IMG_THUMB => new DerivativeParams( SizingParams::classic(144,144) ),
223        IMG_XXSMALL => new DerivativeParams( SizingParams::classic(240,240) ),
224        IMG_XSMALL => new DerivativeParams( SizingParams::classic(432,324) ),
225        IMG_SMALL => new DerivativeParams( SizingParams::classic(576,432) ),
226        IMG_MEDIUM => new DerivativeParams( SizingParams::classic(792,594) ),
227        IMG_LARGE => new DerivativeParams( SizingParams::classic(1008,756) ),
228        IMG_XLARGE => new DerivativeParams( SizingParams::classic(1224,918) ),
229        IMG_XXLARGE => new DerivativeParams( SizingParams::classic(1656,1242) ),

is not correct in the setup?

flop25 · 2015-02-12 14:23:39

yes it is
I was answering myself saying 'no', like you did too

plg · 2015-02-12 15:01:29

Warning : image quality can be related to your internet connection. For example, when I use a mobile 3G connection, my internet provider compress the photos and they become very low quality.

We need to see a specific example before we can say the resize made by Piwigo is repsonsible for a reduced quality.

achmetinternet · 2016-10-22 13:51:50

I think I have a similar issue: I want to use Piwigo on a webspace also as a sort of backup of the pictures which I have on my HDD. This means that they need to be up on Piwigo in the same format, quality and size as they are on my HDD. How can I make sure this happens? What are the settings I need to put in Ploader? Is there anything that I need to change on the server side in Piwigo as well=

I'm a bit worried because after reading the last comment, it seems to me that it is not guaranteed that the pictures uploaded to my server will have the same format, quality and size (even if I knew the settings that I need to change to make this theoretically possible) as the ones on my HDD.

flop25 · 2016-10-22 14:05:40

nonono Piwigo doesn't change anything to uploaded pictures unless you have specified a resize at Upload in Option->Size
then the others are auto generated pictures

The last comment is made by our founder and main Piwigo developer talking about the image quality you can actually receive on your web browser due compressions applied by Content Delivery Networks, server itself... well any intermediary process on which Piwigo can't do anything

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#1 2015-02-12 10:32:40

Image Quality

#2 2015-02-12 11:56:53

Re: Image Quality

#3 2015-02-12 13:08:00

Re: Image Quality

#4 2015-02-12 13:16:58

Re: Image Quality

#5 2015-02-12 13:52:31

Re: Image Quality

#6 2015-02-12 13:54:33

Re: Image Quality

#7 2015-02-12 13:56:22

Re: Image Quality

#8 2015-02-12 14:07:56

Re: Image Quality

#9 2015-02-12 14:09:57

Re: Image Quality

#10 2015-02-12 14:14:36

Re: Image Quality

#11 2015-02-12 14:18:13

Re: Image Quality

Code:

#12 2015-02-12 14:23:39

Re: Image Quality

#13 2015-02-12 15:01:29

Re: Image Quality

#14 2016-10-22 13:51:50

Re: Image Quality

#15 2016-10-22 14:05:40

Re: Image Quality

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