Legacy ImageMagick Discussions Archive

You can compare two different size images with histogram comparison metrics. See my bash unix script, histcompare, at my link below. Hi Fred, Thanks for your response. With regards to the metrics used in the scripts, which do you recommend will be a better indicator of difference between two images ...

There are many ways of comparing two images. IM works by doing some arithmetic on each pair of pixels (one per image). For example, RMSE is the square root of the mean error (where "error" really means "difference"). So the differences in values from the two pixels are squared, then all added ...

I get these results with an unpublished process module, based on http://people.csail.mit.edu/tieu/notebook/kmeans/15_p600-hamerly.pdf k-means, without SD normalisation: http://snibgo.com/imforums/faces_kmeans.png k-means, with SD normalisation*: http://snibgo.com/imforums/faces_hk_norm.png fuzzy k ...

Hi Snibgo, Thanks for responding so fast. yes, I have done that but I worry that the resizing messes with the pixels in the images further. I am looking to measure the difference between two images, hoping it will give measurable insight into how good they will look in comparison to the original ...

Hi all,

I am trying to compare two similar images but with different dimensions. I have tried using the compare function in IM but it requires both images to be of same dimension.

Is there a way to go around this?

My IM version is 7.0.6-0. Mac OS Sierra 10.12.6

Thanks.

Aigo

glennrp wrote: ↑2017-07-28T17:22:36-07:00 Use -sample instead of -resize if you don't want to add interpolated colors.

Thanks so much..that works!

Is there any reason why resize behaves this way? Like a scientific reason?

Thanks!

Aigo

Aah Nice..Thanks..

Yeah..I have done that and it works perfectly.

Thanks!

It should be bash kmeans.sh -n 20 faces.png faces_k10.png Perhaps you can post your faces.png image to some free hosting service and put the URL here so I can test your image. Thanks so much for this and the other examples. But I still get the white image. Could this be a platform problem? Thanks ...

It should be bash kmeans.sh -n 20 faces.png faces_k10.png Perhaps you can post your faces.png image to some free hosting service and put the URL here so I can test your image. Thanks so much for this and the other examples. But I still get the white image. Could this be a platform problem? Thanks ...

Hi there.

Sorry about that.

Here's the sample image https://drive.google.com/file/d/0B3sq7o ... sp=sharing
IM version is 7.0.6-0, Mac-OS Sierra

Thanks!

Aigo

Hi Fred, I tried using the script but I keep on getting a white image.. I only used -n in the process. Kindly help. Thanks. Aigo! What is your IM version and platform? What was the command line you used? Did you follow the Pointers for use on my home page? 7.0.6-0 macOS Sierra this is the command I ...

Hi Fred, I tried using the script but I keep on getting a white image.. I only used -n in the process.

Kindly help.

Thanks.

Aigo!

That seems similar to: Flat-colour cartoons Partition boundary masks Cartoon and texture But perhaps not exactly the same? Yeah, the partition boundary masks are exactly what I am looking for. Sadly, for a newbie to IM like myself the tutorials are not easy to follow plus they are bat files. Is ...

You have not said what OS you are using. If on Unix-like systems, see my kmeans script at the link below. Also for any OS, see IM -mean-shift. Examples of the latter are at http://www.imagemagick.org/discourse-server/viewtopic.php?f=4&t=25504 Yeah I am on UNIX, and both the k-means and mean-shift ...