Legacy ImageMagick Discussions Archive

Hello, I have an equirectangular photo that I would like to convert to little/tiny planet and sky. I can get the polar coordinate style, to create a tiny planet, by doing: convert in.jpg -distort Arc 360 out.jpg But I was curious, is there a better way to do this? I don't think polar coords are true...

Thank you for the help Fred! I owe you one.

You told the output you wanted it to be 72 dpi. So IM converted from pixelspercm to the corresponding pixelsperin and set the density to 72. I think 71.654 is just a rounding error in the display of the data. Ahhhh, interesting! Thank you for the clarification. I guess I assumed that I would see 72...

Interesting! Thank you for checking that! Great observation. So, this (post-conversion): 8.242"x12.363" 182ppi Is actually 71.654 per cm! So, if I understand correctly, the original is in pixels per cm, and after conversion, it's still using pixels per cm? I guess I assumed using: -units P...

Awesome! Thank you so much for your help and time, I really appreciate it! https://dl.dropboxusercontent.com/u/1277106/2.%20Heliconius%20hecale.png I obtained the full resolution image from here: https://commons.wikimedia.org/wiki/File:2._Heliconius_hecale.png Thank you again for you help! Btw, do y...

I think PS may keep its own fields for density and units and ignores those of IM. Ahhhh, interesting! identify -verbose image.jpg Image: image.jpg Format: JPEG (Joint Photographic Experts Group JFIF format) Mime type: image/jpeg Class: DirectClass Geometry: 1500x2250+0+0 Resolution: 182x182 Print s...

(IM version in my signature) Before conversion of a PNG to JPG, in Photoshop, I see: 5"x7.5" 300ppi When I use this command: convert image.png -flatten -density 72 -depth 8 -quality 100 -units PixelsPerInch image.jpg Photoshop shows me: 8.242"x12.363" 182ppi Just curious why the ...

Thanks so much for the detailed info Fred! That is super helpful!!! I am experimenting with all of your, and GeeMack's, tips now.

You guys rock!!!!! Much appreciated.

If I learn anything worth sharing, I will post back code samples here.

Looks like "Comments" is available on Windows too:



Found here: http://stackoverflow.com/q/26091836/922323

Ahhhh, "Comments" is a MacOS Finder meta data thing (kMDItemFinderComment): $ mdls test.jpg _kMDItemOwnerUserID = 501 kMDItemBitsPerSample = 32 kMDItemColorSpace = "RGB" kMDItemContentCreationDate = 2016-12-24 20:07:49 +0000 kMDItemContentModificationDate = 2016-12-24 20:07:49 +0...

GeeMack, looking at your examples, I just realized that IM will have to process the image to add the exif data you mentioned. Thinking about it, I probably want to avoid this as I am using IM to convert images later in my workflow (I need to add original file name earlier in my workflow, but not con...

Thank you so much for the quick reply and pro help GeeMack, I really appreciate it! I am trying your suggestions now. :) Also, thank you for the linkage. Reading that as well. I think I found that page before posting my question, but I was thrown off as I did not see my "Hello world!" comm...

Hello, (my IM version info is in my signature) I am converting a bunch of images to a specific file format (JPG) and I need to store the original file names in the metadata of the image. For example: "foo.png" gets converted to "foo.jpg" and its original file name gets stored in ...

Wow, that's excellent info Fred!!!! Thank you so much for you help!

Thank you snibgo and Fred for your pro help and guidance, I greatly appreciate it!

Hi Fred! Thank you so much for your reply, I really appreciate it! :) Great questions and tips! Thank you! IM will decompress and recompress and thus lose some quality. So you should do that processing from your OS. Perfect! I will do that. :) Note that some jpg files do not have units set nor possi...