Legacy ImageMagick Discussions Archive

So you want to disregard the transparency in one image, and convert the transparency in the other to white? Yes, you need two different commands.

Yes, Gimp shows the same: the lid is opaque, and the rest is transparent.

What program did you use to display the images? Using Gimp on alpha2.tif, I find the pixels of the jar (and lettering and shadow) are transparent. But Gimp gives a warning: "alpha channel type not defined for file D:\web\im\alpha2.tif. Assuming alpha is not premultiplied". This is, I think...

ImageMagick originated in the days when CPUs were measured in MHz not GHz, and memory in MB not GB. Perhaps an option could be added to IM to either: (a) change the number of bins from 1024 to a user-defined number, say 1 million. (b) not to use bins at all, but pixel values. And I do like rnbc's id...

The same command can replace transparency with white (more accurately, it places the image over a white background, so the white shows through fully- or partially-transparent pixels). convert transparent.tif -resize 400x400 -background white -flatten transparent_w.jpg convert alpha2.tif -resize 400x...

http://home.arcor.de/durius.obsidian/transparent2.tif
has a black background.

No. Downloading and examining with Gimp shows it has a transparent black background. (The background is transparent. Using eyedropper or anti-erase reveals black.)

Good stuff. When assembling movies, ffmpeg wants frames with consecutive numbers (EDIT: starting from one), so your copy could change to suit.

A search engine turns up: http://www.down-dll.com/index.php?letter=m , and many other sites full of DLL files. Downloading DLLs from random sites might not be a good idea.

Sorry, I wouldn't know.

It isn't part of ImageMagick. Nor has Google heard of it. What is it supposed to do?

That's it, more or less, but I don't know the details. See http://www.imagemagick.org/script/comma ... php#metric for other metrics. It's a clever command: take a photo of the dog, another of the garden, and it will try to find the dog in the garden.

I don't know. But your version is six (!) years old. "-quiet" may have been introduced since then, along with other features the script uses.

Looking at the script, the complaint about the file arose simply because the convert failed. It failed because it didn't recognise "-quiet". What version IM are you running? I suggest you update it.

Imagemagic can compare frames, eg:

compare -metric RMSE frame0021.jpg frame0022.jpg null: 2>comp21-22.txt

It generates numbers where larger means more different. I would create a script that did all the comparisons and looked for unusually large numbers.

If you want the image stretched to 640x680, you need "!".

convert in.png -resize 640x680! out.png

See http://www.imagemagick.org/script/comma ... php#resize
and http://www.imagemagick.org/script/comma ... p#geometry