Smart cropping of images and add border

automatorcropgraphicsimage editing

I need to perform batch cropping to approximately 3000 images. Each image is for a different item.

What I need is a crop tool that can define the item from the background and add specific amount of pixels to the top, bottom, right and left of it.

For example, see the image below. Can I use Automator?

Best Answer

You can use Imagemagick, available on Homebrew.

convert /path/to/in.png \
  -trim \
  +repage \
  -bordercolor White \
  -border 100x100 \
  /path/to/out.png

The image is trimmed using -trim operation which removes the border from the image.

This option removes any edges that are exactly the same color as the corner pixels. Use -fuzz to make -trim remove edges that are nearly the same color as the corner pixels.

^{http://www.imagemagick.org/script/command-line-options.php}
A +repage is performed on the virtual canvas to ‘flatten’ the crop.
The -border is added, in White.

Related Solutions

Mac – How to Automate Cropping Images

You may use ImageMagick in order to crop from command line. That way you may include the command inside an Applescript, or call the command directly from terminal.

You can install it following these instructions and then you crop all images inside a folder, given:

convert '*.jpg' -crop 120x120+10+5 thumbnail%03d.png

where 120x120 is the resulting size and 10+5 is the offset (10 pixels width and 5 pixels height).

Repeat actionscript in Sierra

If I understood your question, you do not want it prompting for the files to act upon and you want it to act upon all specified files, the following will do that.

In Automator, create a new Workflow. (Automator > File > New > Workflow)
Add a Get Specified Finder Items action.
- Add the items you want to be in the Get Specified Finder Items action. The items can be files and or folders.
Add a Get Folder Contents action.
- This is to handle if an item in the Get Specified Finder Items action is a Folder.
Add a Run AppleScript action.
- Add the following AppleScript code to replace the default code.

on run {input, parameters}
    set list_of_files to input
    repeat with this_file in list_of_files
        -- indicate the proportions for the pad area
        set H_proportion to 1
        set V_proportion to 1
        try
            tell application "Image Events"
                -- start the Image Events application
                launch
                -- open the image file
                set this_image to open this_file
                -- get dimensions of the image
                copy dimensions of this_image to {W, H}
                -- calculate pad dimensions
                if H_proportion is greater than V_proportion then
                    set the new_W to (H * H_proportion) / V_proportion
                    set pad_dimensions to {new_W, H}
                else
                    set the new_H to (W * V_proportion) / H_proportion
                    set pad_dimensions to {W, new_H}
                end if
                -- perform action
                pad this_image to dimensions pad_dimensions with pad color {65535, 65535, 65535}
                -- save the changes
                save this_image with icon
                -- purge the open image data
                close this_image
            end tell
        on error error_message
            display dialog error_message
        end try
    end repeat
    return input
end run

Best Answer

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Mac – How to Automate Cropping Images

Repeat actionscript in Sierra

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