Histogram addition

drare · September 5th, 2009, 05:23 AM

Chuck,

Our members has ask me if a photo histogram is possible, I told him that this is not implemented in PP, however, I've com accross a php file and intergrated in the showphoto.tmpl, guess what, it works!

But, when I look at the histogram its mirrored, somehow I can't figure out why it does that, if I excute it standalone its normal.

I know this is not standard PP, but I was hoping you could take a look at it, it might be an addtion for other users.

The code I added to showphoto.tmpl is marked bold and red
An example of the hist you can see here: **** - WFC Foto Beeld, de interactieve foto site van Nederland , right under the photo is the histogram

Thanks in advance

Code:

Content visible to verified customers only.

Chuck S · September 5th, 2009, 08:39 AM

I dont see anything in the code. Merely looks to me like the graph goes fropm 0 to 255 and plots out the color spectrum used right? How do you think its backwards?

drare · September 5th, 2009, 09:07 AM

Quote:

Originally Posted by Chuck S

0 to 255 and plots out the color spectrum used right? How do you think its backwards?

That's correct, what do you mean by backwards?

The strange thing is also, on some photo's the histogram is not there, not displayed, can it be that I call the wrong variable for the image?

$source_file = $imgurl;
$imgurl is what I fond in showphoto.php.

This is an example of a file in de data map of PP and put the file right into it, the result of the standalone file: http://www.wfcfotobeeld.com/temp/histogram.php

Same picture from the galery, no histogram: http://www.wfcfotobeeld.com/showphoto.php?photo=9989

In the galery for the same file no histogram is displyed, so it might be the $imgurl

Gerard

Chuck S · September 5th, 2009, 11:11 AM

$imgurl is the correct image url

I dont see a histogram for any of your photos

drare · September 5th, 2009, 11:31 AM

Ok so that's ok, that's right Chuck, I've disabled it in the meantime, I'm looking also for a js solution, I'm onto something right now and figuring out if this is something.

The fact is, I would like to have seperate histo's for r,g,b, if I find something that works in PP than I can post it here on the forum.

drare · September 5th, 2009, 12:32 PM

JS not working, In post 2 you are talking about backwards, I have no idea what excactly what you mean.

Somehow still the stand alone works fine, but a image is not from a variable, I did include the histogram.php:

Code:

Content visible to verified customers only.

It gives the same output, mirrored histo, very strange because all of the code is the original from the stand alone.

So somehow when implementen in the galery it gives the mirrored output, and I really can't find anything.

Yet another brain breaker!

Chuck S · September 5th, 2009, 03:30 PM

Quote:

But, when I look at the histogram its mirrored, somehow I can't figure out why it does that, if I excute it standalone its normal.

my backwards comment comes from your comment there.

drare · September 5th, 2009, 03:39 PM

Chuck, I'm not sure what you mean by backwards, what should I do backwards?

Chuck S · September 5th, 2009, 03:51 PM

Nevermind your not getting it. You are the one telling me its backwards as thats what mirrored means to me

drare · September 5th, 2009, 04:02 PM

I think I now understand it.

What I just don't get is that in standalone version the graph is just right, not mirrored, once implemented in the template it's mirrored. Not the worse thing, because it's stil generates a graph, but with a mirror beneath it.

For photographers and for learning two things are most important, A) Exif, B) the histogram, maybe it's would be an addition to implement this histogram in a future version of PP.

Chuck, just something else, lets say I put a normal link into the template to the histo php file, is there a way to transfer the data of $imgurl to the php file? That way I maybe could work something else out?

Again thanks for helping me with this, and I know I've had some (interesting) challenges these past weeks/months.

Chuck S · September 5th, 2009, 04:37 PM

well you can include the histo file using an include. The $imgurl variable is available via the script.

drare · September 6th, 2009, 06:15 AM

I did include the histogram.php, no effect, at least still the same mirrored histo.

So I tried to call the standalone histogram.php to display the histo in a new small window in this way:

Code:

Content visible to verified customers only.

If I click on the link, the page is opened, but the $imgurl is not passed on to the histogram.php if I get the $imgurl to be passes on to the histogram.php than it should be working perfectly.

Chuck S · September 6th, 2009, 07:47 AM

Yes thats correct as the variable is not defined then.

drare · September 6th, 2009, 09:00 AM

OK, I've placed it now here:

Code:

Content visible to verified customers only.

Just after the title of the photo, where should I place it then?

Chuck S · September 6th, 2009, 10:24 AM

You cant do that unless say for instance your histogram.php file allows you to define the histofile variable via a $_GET instance.

drare · September 6th, 2009, 12:16 PM

I've done it!! Chuck the problem seems to lie in the fysical location of the histogram.php file. The example above is in a /temp/ map, I placed it there, and guess what, it works!!!

Strange? Yes!, Why? I don't know but does it matter, not to us. For an example surf here: Mijn tong in iets lekkers. - WFC Foto Beeld, de interactieve foto site van Nederland (yes all is Dutch, but surf beneath the photo and see the link: Histogram, click and see the histo in a small new window.

Pffff I can use a druk, wodka seems to be the right choice I think.
Gerard

Chuck S · September 6th, 2009, 12:32 PM

OMG! Mature content! - ReefTalk Gallery

Yeah well might be something server specific

I did what you did in your initial post number 1 and it seems to view perfect on my site.

drare · September 6th, 2009, 01:37 PM

Hmmm strange title Mature content

and I see aquariums

, your passion I guess

So, I see, you have implemented the histo into the template, I guess. May I look into the code Chuck to see what you did, maybe I can do the same.
But I think in our case it was just the root on the server that does not work for us.

But something I discovered, the place in my initial post and on your site is beneath the description section, I discovered when nothing is filled in in the description field, the histo will not be shown, like I said in an earlier post, try it out for yourself, maybe not with you.

What do you think Chuck, an addition to future versions of PP this histo, for photographers it is a must, at least for our photographers.

Chuck S · September 6th, 2009, 01:51 PM

Correct thats why nothing will show if you dont have a description thats right.

IMG_6268_1 - ReefTalk Gallery

Mine is a bit different than yours but you can view my template here

http://www.reeftalk.com/gallery/temp...showphoto.tmpl

I am merely saying mine works unlike yours that was mirrored when you did it in the template