Legacy ImageMagick Discussions Archive

@snibgo: any thought on applying this enhancement technique (CLAHE) on an image which has been outputted by enfuse? (exposure-fusion) ...at the moment I'm using a simple -sigmoidal-contrast 2x50%

I've finally found the solution with the little help of the http://meetthegimp.org/ community (to get a better understanding of the layer/mask)

http://cbompart.wordpress.com/2010/06/0 ... agemagick/

I've updated IM to the latest release (6.6.1-10) I've been able to go to step 6 from the original tutorial: convert girl.png -modulate 100,0,100 step2.tiff composite step2.tiff girl.png -compose difference step3.tiff composite step3.tiff girl.png -compose multiply step5.tiff composite step5.tiff ...

thx I'll have a look @home with an updated version

I'm just trying to do some basic stuff... What's the difference with convert girl.png -colorspace HSL -separate girl_hsl%d.tiff convert girl_hsl1.tiff -evaluate set 0 girl_hsl1_zero.tiff mv girl_hsl1_zero.tiff girl_hsl1.tiff convert girl_hsl?.tiff -set colorspace HSL -combine -colorspace RGB girl2 ...

that's not the correct solution...

...here is maybe a solution, I need to further compare with the PS4 result convert girl.png \( -clone 0 -modulate 100,0,100 \) -compose difference -composite mask1.tiff convert girl.png -normalize -modulate 100,130,100 mask2.tiff composite -compose CopyOpacity \( mask1.tiff -negate \) mask2.tiff ...

that's the same thing than my first 2 steps...

Thanks a lot for the pointers! I've been able to replicate perfectly the tutorial with PS4... It's nightmare to reproduce a mask/layer with IM, I can't get my head around it! :-) convert test.tiff -modulate 100,0,100 test_without_saturation.tiff composite test_without_saluration.tiff test.tiff ...

I've found this tutorial and I'm just wondering if there is an already built feature in IM to do that. If not then what's the simple way to achieve that special saturation mask?

http://www.clippingimages.com/blog/adaptive-saturation/

Cheers,
Ced.

Hi,

Yes the comparison is fine, just the scale due to the value returned from the identify mean. I need to play around with your "huge" command to understand everything...

Regards,
Ced.

Hi, Thanks a lot for the plug and play script, so I can remove my C program from my bash script... ;-) I'll test your script tonight. The min value is supposed to skip the 7th or lower f-stop values which is really noisy. And the max value is supposed to skip the values higher than 90% due to non ...

the colorspace Rec601Luma and the threshold value produce the correct black and white mask...

I'm getting the correct result with the Copy Opacity operator, but ultimately I would like to replace the transparent pixel to opaque white? ...how can I do that after the last convert?

I'm fine to perform a mask, the only thing I have is the difficulty to replicate the actual mask from this tutorial... :? I think I've been able to replicate step 1 and step 2. ./curves "0,0 12.5,37.5 25,62.5 50,87.5 100,100" img_orig.tiff img_bright.tiff composite -compose CopyOpacity img_bright ...

Thanks for the details, I'm fine with the maths. I was wondering how can I re-produce the different layering masks from that tone mapping tutorial. I'm not looking to add different layers to an image like Photoshop. I just want to reproduce the same final effect by producing masks which I can ...