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docs/rake_tasks/resize_images.md

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+# resize_images
+
+This task resizes all images (.jpeg, .jpg, .png, .tif, or .tiff) in a folder of files within this repository. 
+It outputs the resized images to a new folder in this repository, with all filenames and extensions lowercased, and optionally converted into another image format.
+
+Requirements:
+
+- **ImageMagick**, [download](https://imagemagick.org/script/download.php)
+
+Using defaults:
+
+- Put all images in the "objects/" folder.
+- run `rake resize_images` (images will be same format, resized to 3000 pixel max width and height while preserving aspect ratio)
+- All images will be output to "resized/" folder.
+
+The options can be changed by passing arguments with the rake command.
+
+| option | description | default value |
+| --- | --- | --- |
+| new_size | resizing parameter following [ImageMagick geometry conventions](https://imagemagick.org/script/command-line-processing.php#geometry) | '3000x3000' |
+| new_format | optionally change format of the image. Leave blank or provide a valid image extension starting with `.` (".jpg", ".png", ".tif") | false |
+| input_dir | folder containing all the images | 'objects' |
+| output_dir | folder to output the resized images | 'resized' |
+
+
+The order follows [:new_size, :new_format, :input_dir, :output_dir].
+For example, 
+
+`rake resize_images["5000x5000",".jpg","raw_folder","new_folder"]`
+