kfu

automated PNG collages

brew install imagemagick

montage *.png -thumbnail 200x200 -geometry +2+2 -background white -density 300x300 -quality 100 collage.pdf

create collage of all pngs in a directory

montage *.png -geometry +0+0 -background white composite.png

create collage of all pngs in a directory xparent

magick montage *.png -geometry +0+0 -background none composite.png

create overlay

convert *.png -background none -layers flatten composite.png

create collage with green background

montage *.png -geometry +0+0 -background "#00ff00" composite.png

create collage with all png’s in cwd and it’s subdirectories

find . -iname "*.png" > pnglist.txt
montage @pnglist.txt -geometry +0+0 -background "#00ff00" composite.png
rm pnglist.txt

RESIZE ALL PNG’S TO 25%

for file in *.png; do sips -Z $(($(sips -g pixelWidth "$file" | awk '/pixelWidth/ {print $2}') / 4)) "$file"; done

TO AVOID OVERWRITING EXISTING FILES SPECIFY AN OUTPUT DIRECTORY

mkdir -p /path/to/resized
for img in /path/to/folder/*.jpg; do
    filename=$(basename "$img")
    sips --resampleWidth 25% "$img" --out "/path/to/resized/$filename"
done

DIVIDE PNG INTO SECTIONS OF 64x64

convert input.png -crop 64x64 +repage +adjoin tile_%d.png

script to combine all .png’s and organize them by size for montage

#!/bin/bash

# Create a temporary file to hold filenames and dimensions
tempfile=$(mktemp)

# Find all PNG files excluding ones starting with ._ and get their dimensions
find . -iname "*.png" ! -name "._*" -exec identify -format "%w %h %i\n" {} \; > "$tempfile"

# Sort the files by dimensions (width then height)
# Adjust the sort command as needed; here, it's numeric sort by width and then height
sort -n -k 1,1 -k 2,2 "$tempfile" | awk '{print $3}' > sorted_files.txt

# Now, use the sorted list of files for the montage or composite command
# Example with montage, to arrange sorted images side by side with a green background
montage @sorted_files.txt -geometry +0+0 -background "#00ff00" composite.png

# Clean up temporary files
rm "$tempfile" sorted_files.txt

CONVERT .PDF TO .PNG

sips -s format png input.pdf --out output.png

ADD 4X WHITE BORDER TO IMAGE

convert input.png -bordercolor white -border 4x4 output.png

SCAN FOR IMAGE TYPE AND CREATE .PDF OF THUMBNAILS

sips -Z 200 *.{jpg,jpeg,png,} --out thumbnails/ && convert thumbnails/*.jpg thumbnails/*.jpeg thumbnails/*.png thumbnails/*.gif output.pdf

CROP ALL .PNG’S TO 500X500

for file in *.png; do convert "$file" -crop 500x500+0+0 "${file%.*}_cropped.png"; done

CONVERT ALL .JP2’S WITHIN DIRECTORY TO .PNG

find /path/to/folder -name "*.jp2" -exec sips -s format png {} --out {}.png \;

DETERMINE COLOR PALETTE OF PNG

convert input.png +dither -colors 256 -format %c histogram:info:- | awk '{print $NF}'


^ MORE DETAILED OUTPUT

convert yourimage.png +dither -colors 256 -format %c histogram:info:-

CONVERT ALL PNG’S IN A DIR TO A .PDF

convert *.png output.pdf

SHELL SCRIPT TO COMBINE LAYER OVERLAYS FROM DIRECTORIES HEADS>TAILS

#!/bin/bash

for head in heads/*.png; do
  for tail in tails/*.png; do
    head_name="$(basename "$head")"
    tail_name="$(basename "$tail")"
    combined_name="${head_name%.*}_${tail_name%.*}.png"
    convert "$tail" "$head" -composite "combined_images/$combined_name"
  done
done

COUNT GIF FRAMES

identify -format "%n\n" input.gif | head -n 1

EXTRACT FRAMES FROM GIF

convert yourfile.gif frame_%04d.png

CREATE A SOLID COLOR PNG OF A SPECIFIC SIZE

convert -size 1920x1280 xc:black black_image.png

OVERLAY ALL IMAGES IN A DIRECTORY OVER THE SOLID COLOR PNG (ASSUMING IMAGES ARE NAMED image0.png ETC)

for i in {1..14}; do
  convert black_image.png image${i}.png -composite output${i}.png
done