This code uses ImageMagick's convert command to resize and enhance an input image, applying various filters and processing techniques, and saving the final output as a new image file.

The code resizes and enhances an input image using ImageMagick's convert command, applying techniques such as despeckling and alpha channel processing. The final output image is saved as a new file, with adjustable quality settings and a maximum width of 600 pixels.

Cell 3

convert -density 600 "./.output/IMG_1587.JPG" -resize "600^<" -scale 50% "./.output/IMG_1587-final.jpg" || true && \
    convert "./.output/IMG_1587-final.jpg" +clone -enhance -despeckle -alpha on -channel alpha -evaluate multiply 0.25 -composite -quality 

#!/bin/bash

# Set input and output images
INPUT_IMAGE="./.output/IMG_1587.JPG"
OUTPUT_IMAGE="./.output/IMG_1587-final.jpg"

# Set density and resize options
DENSITY=600
RESIZE_HEIGHT=600

# Resize image
convert -density ${DENSITY} ${INPUT_IMAGE} -resize "${RESIZE_HEIGHT}^<" -scale 50% \
    ${OUTPUT_IMAGE} || true

# Enhance image
ENHANCED_IMAGE=$(convert ${OUTPUT_IMAGE} +clone -enhance -despeckle -alpha on \
    -channel alpha -evaluate multiply 0.25 -composite -quality)

# Save enhanced image
echo "${ENHANCED_IMAGE}" > ${OUTPUT_IMAGE}

Code Breakdown

Purpose

The code uses the ImageMagick convert command to:

1. Resize an image
2. Apply enhancements and filtering
3. Save the processed image

Command

convert -density 600 "./.output/IMG_1587.JPG" -resize "600^<" -scale 50% "./.output/IMG_1587-final.jpg" || true && \
    convert "./.output/IMG_1587-final.jpg" +clone -enhance -despeckle -alpha on -channel alpha -evaluate multiply 0.25 -composite -quality

Options and Commands

1. -density 600: Set the resolution of the input image to 600 dpi.
2. -resize "600^<": Resize the image to a maximum width of 600 pixels, maintaining the aspect ratio.
3. -scale 50%: Scale the image down by 50%.
4. || true: If the previous command fails, execute the following command anyway (using a true command).
5. &&: Separate the two convert commands with an "and" operator, ensuring that the second command only executes if the first command is successful.
6. -clone: Create a clone of the original image.
7. -enhance: Apply image enhancement techniques.
8. -despeckle: Remove speckles from the image.
9. -alpha on: Enable alpha channel processing.
10. -channel alpha: Process the alpha channel.
11. -evaluate multiply 0.25: Apply a multiply operation to the alpha channel with a value of 0.25.
12. -composite: Composite the enhanced image with the original image.
13. -quality: Set the quality of the output image.

Input and Output

1. ./.output/IMG_1587.JPG: The input image file.
2. ./.output/IMG_1587-final.jpg: The output image file.