Legacy ImageMagick Discussions Archive

Thank you! Brilliant. Much appreciated.

Hi All,

I have read this example for the ImageMagick example pages:

convert -size 75x75 gradient:black-white blur_map_gradient.gif
convert koala.gif blur_map_gradient.gif \
-compose blur -define compose:args=3 -composite \
blur_koala_gradient.gif

...as explained in example pages, this will ...

Yes. Exactly what I was looking for. Thanks for your help! I was nowhere close to this.

Hi all.

I would like to apply a non-linear scaling to an image with image edge as center point.

To illustrate what I am trying to achieve, I have manually created an input and output file in Photoshop. I have used a a grid to help visualize, but the effect will be applied to photos. Basically, the ...

The final objective was creating a drop shadow. I am aware there is a drop shadow command but wanted to give this a try. Basically I will take the output as described, offset it, then composite the original image on top.

Thanks Fred. I can confirm I got it to work!

So this is what I did:

convert frame.tif -fill black -colorize 100%% frame.tif
convert frame.tif -channel a -evaluate multiply 0.6 +channel result.tif

I had to add the additional line of code to your last suggestion. This way there is a opacity with ...

Thanks Fred. I can confirm I got it to work!

So this is what I did:

convert frame.tif -fill black -colorize 100%% frame.tif
convert frame.tif -channel a -evaluate multiply 0.6 +channel result.tif

I had to add the additional line of code to your last suggestion. This way there is a opacity with ...

Input image: https://drive.google.com/file/d/1hbqP8esimD7h7hJqtrRUrtPSP8Cd9Fc4/view?usp=sharing
Output image: https://drive.google.com/file/d/1-7rJj9fJLwT4gJNpLlrXPybYV0wSMJue/view?usp=sharing

Yes, the input has transparency only inside of the frame. I can create a mask. I will work in that ...

convert frame.tiff -fill "black" -colorize 100 -alpha set -channel a -evaluate set 60%% +channel frame2.tiff

I am trying to get the frame/border in frame.tiff filled black with about 60% transparency. The above code works except, it also fills in the inner part of the frame and that I dont want.

Here is the image I am working with: https://drive.google.com/file/d/1hbqP8esimD7h7hJqtrRUrtPSP8Cd9Fc4/view?usp=sharing
The black part of the image is transparent.

The is the full command I am using: -fill "black" -colorize 100 -alpha set -channel a -evaluate set 60%% +channel

and here is result ...

Your right. I took a closer look at the image. It fix the issue with the hole in the image, but as you said there is actually no transparency.

Just got it to work. Here is what I worked:

-fill "black" -colorize 100 -evaluate set 25%% +channel

Thanks Fred. The last snippet you provided works, but it does not account for transparent hole in the image. I am working with a image similar to a picture frame, with border all around edges and inside is transparent. The result I get is perfect except it fills in the hole in the image. Im not sure ...

Hi everyone,

Im using Windows Shell with ImageMagick-6.9.3-Q16-HDRI.

Can someone help me convert the following to equivalent windows code:

-fill "black(25%)" -colorize 100

I got this working as expected:

-fill black -colorize 100%%

...but I need to make the black partially transparent. I ...

Thanks for the help! Without knowing the .suffix, I was able to successfully use:

convert in.* out.tiff