Created
June 3, 2014 14:31
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| #!/bin/sh | |
| # Imagemagick analogue of Adobe Photoshop Gradient map with 75% opacity on it | |
| # you will need the input.jpg file with original color image | |
| # and gradient_line.png file with 256 x 1 px image of gradient | |
| # make image grayscale | |
| convert input.jpg -colorspace gray draft.jpg | |
| # apply the gradient lut | |
| convert draft.jpg gradient_line.png -clut draft.jpg | |
| # set 75% opacity | |
| convert draft.jpg -alpha on -channel a -evaluate set 75% draft.png | |
| # impose result image on original image | |
| convert the_in.jpg temp.png -gravity center -composite -format jpg -quality 90 output.jpg | |
| # remove temporary files | |
| rm draft.jpg && rm draft.png |
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