Black and White Conversion with GEGL’s c2g (color2gray) in GIMP

wengen_final_bwPaul has a post on his blog about Black and White Conversion with GEGL’s c2g (color2gray) in GIMP. We had that here too, and way before him (because Joel blogged about it….). But he has looked deep into this and has helpful instructions about when and how to use it. Verdict: Quite useful, but not the tool to make all other monochrome conversion tools useless.

The image is stolen from his site.

Episode 084: The 3 Letter Acronym Show (RePost)

This is a repost of Episode 84 – there seem to be some feed problems. there is no need for download if you have seen 84 already.

84This week I start with a short introduction into autostereoscopic images, see two posts below. Then I cover the GEGL operation “c2g”, which converts acouloured image into a monochrome image with a lot of noise or other other effects. It’s a “try out” thing – up to now I have not found documentation. Perhaps one has to look into the source. Be warned – some parameters can kill the program.

Then Joseph tells us. how easy it is to make “HDR” images with QTPFSGUI. It’s not as complicated as I feared. I’ll try it soon myself. The website Joseph pointed me to is here.

The TOC

00:28 Autostereoscopic images

02:10 Petersons image with GEGL c2g

03:30 c2g is used

06:30 Introducing Joseph

07:00 Introduction into HDR photography

09:00 QTPFSGui

10:00 Aligning the images

10:30 waiting….

11:20 Editing tools

12:10 Set the parameters

12:50 Save the image

13:00 Change the EV values

14:30 Tone mapping

15:40 saving in an LDR format (JPEG)

16:20 different effects

18:10 Web site with more info

Creative Commons License This work is licensed under a

Creative Commons Attribution-Share Alike 2.0 Germany License.

Episode 084: The 3 Letter Acronym Show

Download the Video!
Download the companion file! (…if there is one…. 😉 )

84This week I start with a short introduction into autostereoscopic images, see two posts below. Then I  cover the GEGL operation “c2g”, which converts acouloured image into a monochrome image with a lot of noise or other other effects. It’s a “try out” thing – up to now I have not found documentation. Perhaps one has to look into the source. Be warned – some parameters can kill the program.

Then Joseph tells us. how easy it is to make “HDR” images. It’s not as complicated as I feared. I’ll try it soon myself. The website Joseph pointed me to is here.

The TOC

00:28 Autostereoscopic images
02:10 Petersons image with GEGL c2g
03:30 c2g is used
06:30 Introducing Joseph
07:00 Introduction into HDR photography
09:00 QTPFSGui
10:00 Aligning the images
10:30 waiting….
11:20 Editing tools
12:10 Set the parameters
12:50 Save the image
13:00 Change the EV values
14:30 Tone mapping
15:40 saving in an LDR format (JPEG)
16:20 different effects
18:10 Web site with more info

Creative Commons License This work is licensed under a
Creative Commons Attribution-Share Alike 2.0 Germany License.