81 lines
2.1 KiB
Bash
81 lines
2.1 KiB
Bash
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#!/bin/bash
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###############################################################################
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# Script Name: crop_images.sh
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#
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# Description:
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# Safely processes JPEG images in the current directory. If an image has a
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# width of 3546 pixels, the script:
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# 1. Creates a cropped copy (2448x3264 from the top-left corner).
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# 2. Saves the cropped image as *_c.jpg.
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# 3. Renames the original image as *_u.jpg.
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#
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# Features:
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# - Processes only .jpg files.
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# - Handles filenames containing spaces.
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# - Verifies that ImageMagick is installed.
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# - Skips files that have already been processed.
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# - Uses ImageMagick's format output instead of parsing command output.
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#
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# Requirements:
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# - Bash
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# - ImageMagick (identify, convert)
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#
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# Usage:
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# chmod +x crop_images.sh
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# ./crop_images.sh
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#
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###############################################################################
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set -euo pipefail
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# Verify required commands exist
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for cmd in identify convert; do
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command -v "$cmd" >/dev/null 2>&1 || {
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echo "Error: '$cmd' command not found. Install ImageMagick."
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exit 1
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}
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done
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# Process JPEG files only
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for img in *.jpg *.JPG; do
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# Skip if no matching files exist
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[[ -f "$img" ]] || continue
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# Skip files already processed
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[[ "$img" =~ _c\.jpg$|_u\.jpg$ ]] && continue
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# Get image dimensions (e.g. 3546x4728)
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size=$(identify -format "%wx%h" "$img" 2>/dev/null) || {
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echo "Skipping invalid image: $img"
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continue
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}
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# Process only images whose width is exactly 3546 pixels
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if [[ "$size" == 3546x* ]]; then
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echo "Processing: $img ($size)"
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cropped="${img%.jpg}_c.jpg"
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original="${img%.jpg}_u.jpg"
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# Handle uppercase extension
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if [[ "$img" == *.JPG ]]; then
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cropped="${img%.JPG}_c.jpg"
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original="${img%.JPG}_u.jpg"
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fi
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# Create cropped image
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convert "$img" -crop 2448x3264+0+0 "$cropped"
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# Rename original image
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mv "$img" "$original"
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echo " Created: $cropped"
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echo " Renamed: $original"
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fi
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done
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echo "Done."
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