Midnight Sepia filter

fluffybunny · **Posted:** Sat May 11, 2013 5:07 am **(#1)**

If any of you use the Midnight Sepia filter author: 'Cprogrammer' found under either
Filters->Photo->Midnight Sepia (midnightSepia.scm and functions.scm) or
FX-Foundry->Photo->Effects->Midnight Sepia (cprogrammer-midnight-sepia.scm)

There a bug that will cause a 'division by zero' error if the user selects a color that has equal values for Red, Blue & Green (RGB).
ie aaaaaa, 000000, ffffff, 333333 etc.

I have fixed the script, and am happy to post it here if anyone desperately wants it.
However, since it was written back in 2008, it has likely been superseded by a newer script or plugin by now anyway...
But if you use this filter often and been 'plagued' by division by zero script crashes, yell out

So far I have not been able to find a way to notify the author Cprogrammer.
I have tried searching Google, and the Gimpchat and Gimptalk memberships.
I did find that the script is available from Gimpscripts.com, does anyone know how to contact this person?

PS I had never used this midnight sepia filter before the bug was found.
I just copied the Midnight Sepia's 'RGB to HSV' functions to use in the Glass Text v1.3 script change for dinasset.
Dinasset then discovered the bug while testing my script changes.

paynekj · **Posted:** Sat May 11, 2013 5:37 am **(#2)**

I searched the plugin registry for Midnight Sepia and got two hits, both uploaded by cprogrammer:

http://registry.gimp.org/node/3080
http://registry.gimp.org/node/10980

The second of which links to a support thread on Flickr: http://www.flickr.com/groups/gimpusers/ ... 423763223/ started by cprogrammer which should give you a way of contacting them.

Kevin

GnuTux · **Posted:** Sat May 11, 2013 5:57 am **(#3)**

This is the support link for that script (located in the script description on gimpscripts.com).

fluffybunny · **Posted:** Sat May 11, 2013 6:27 am **(#4)**

I have chased up your lead.
His last post on that Flickr group was 55 months ago

He did provide a gmail account. So I have fired off an email...not holding my breath that the account is still valid though. (Update - mail hasn't bounced - so that is a promising first step

)
Thanks for your efforts Kevin and GnuTux.

fluffybunny · **Posted:** Sat May 11, 2013 6:49 pm **(#5)**

Update: Cprogrammer has replied to my email and stated that he will correct his scripts soon.

Graechan · **Posted:** Sat May 11, 2013 10:10 pm **(#6)**

This is a confusing script to try and read, I found this description of what a Sepia should be wikipedia

so I have attempted to emulate a sepia

Original Image

Image desaturated

Image with Sepia

Image with attempted Midnight-Sepia

dinasset · **Posted:** Sun May 12, 2013 1:20 am **(#7)**

@Graechan
Is it your home? It's a very nice place...

dinasset · **Posted:** Sun May 12, 2013 1:41 am **(#8)**

It's really not properly a "sepia", but it's flexible, you can play with layers and colour and opacity; difficult to get a really nice result, at least for me, not a fun of sepia or other colourising techniques.
Also, due to the implicit problems in the colourise function, you better put negative values on the lightness...

Graechan · **Posted:** Sun May 12, 2013 2:48 am **(#9)**

Dinasset Image is from a tutorial I did ages ago; and I had to look up what a sepia is as I had no Idea but gimp does have a default one called Old Photo under filters/Decor

ek22 · **Posted:** Sun May 12, 2013 7:43 pm **(#10)**

If you blend your super light sepia and your super dark sepia images you might actually come up with some pleasant-to-the-eye results.

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