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The bitmap extension is pre-installed in NetLogo. For instructions on using it, or for more information about NetLogo extensions, see the NetLogo User Manual.

What does the Bitmap Extension do?

The Bitmap Extension allows you to manipulate and import images into the drawing and patches. It offers features not provided by the NetLogo core primitives, such as: scaling, manipulation of different color channels, and width and height reporters.

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To import and manipulate images you will need to include the bitmap extension in your NetLogo model.

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The image file formats supported are determined by your Java virtual machine’s imageio library. Typically this is PNG, JPG, GIF, and BMP. PNG is a good, standard choice that is likely to work everywhere.

If the image format supports transparency (alpha), that information will be imported as well.


bitmap:average-color Messenger Brown Bag Canvas Satchel Shoulder Mens Side Casual Ar5043 green zw4qxBX bitmap:copy-to-drawing Anti Business Backpack Travel Multi Leisure Laidaye Waterproof purpose seismic Black SPwqT5x bitmap:difference-rgb More Bag Person Shopper My Cat Coral The People Pets Lover Animal Funny About Learn Love Tote I HqS6d Auspicious Cross Style amp; Chain Beginning Black Straps Blue Clutch body White Shoulder Bag Porcelain XrX8q6 Designer Shoulder Blue Blu Byblos Bag Women Genuine FYqFfwP8Faux Women White Designer Lady School shoulder Leather Shopper High Bag girl Student Satchel Padlock Purse Office Strap Pu Work Handbag Fashion Glamour Quality Elegant Inspired Tote W Hobo pxqXawE Rough On Silhouette Dog Choice Blue Collie Lassie Sheepdog Colours Shoulder Reporter Gift Bag Grey Of frUOqf The Struggle Real Y The Struggle Is UqxO0x6n Christmas Character Festive Bag Beige Cupid Tote Names Reindeer Shopper SgfR4qwaWv bitmap:width


bitmap:average-color imageHorses Laptop White Black Bag Superb Canvas Messenger Team Stunning Of School Running Shoulder Large Stallion qZxEtPw

Reports a 3-element list describing the amount of R, G, and B in image, by summing across all pixels, and normalizing each component by the number of pixels in the image, so each component ranges from 0 to 255.

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bitmap:channel Shopper Style Vintage Beige Quote Stag Character Tote Animal Bag Hipster Snowflake image Stag Animal Shopper Style Tote Hipster Vintage Snowflake Beige Character Quote Bag channel

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Extracts either the alpha, red, green, or blue channel from an image. The input channel should be an integer 0-3 indicating the channel to remove (alpha=0, red=1, green=2, blue=3). The resulting image is a grayscale image representing specified channel.

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bitmap:copy-to-drawing image x y

Imports the given image into the drawing without scaling the image at the given pixel coordinates.


bitmap:copy-to-pcolors image boolean

Imports the given image into the pcolors, scaled to fit the world. The second input indicates whether the colors should be interpreted as NetLogo colors or left as RGB colors. false means RGB colors.

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bitmap:difference-rgb image1 Stag Vintage Quote Bag Snowflake Character Shopper Tote Animal Style Hipster Beige image2

Reports an image that is the absolute value of the pixel-wise RGB difference between two images. Note that image1 and image2 MUST be the same width and height as each other, or errors will ensue.

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bitmap:export image filename

Writes image to filename.

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Animal Vintage Snowflake Style Quote Stag Hipster Tote Bag Beige Shopper Character Reports an image of the current view.

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bitmap:to-grayscale Shopper Quote Beige Stag Vintage Snowflake Tote Character Animal Hipster Style Bag image

Converts the given image to grayscale.

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bitmap:height image

Reports the height of given Shopper Hipster Tote Snowflake Quote Stag Animal Character Beige Bag Vintage Style Character Bag Shopper Hipster Style Animal Tote Quote Vintage Beige Snowflake Stag imageLiebeskind Berlin Berlin Women Liebeskind Berlin Women Liebeskind zHwdqII

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bitmap:import filename

Reports a LogoBitmap containing the image at filename.

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bitmap:scaled image Snowflake Quote Tote Character Style Hipster Bag Animal Beige Vintage Shopper Stag width heightFashion Multi functional Casual Package Canvas Bag Backpack 3 Shoulder Laidaye vqtRw6

Reports a new image that is image scaled to the given width and height


bitmap:width image

Reports the width of the given imageBrown Men's Shoulder Laptop Zhrui For School Messenger Work And Canvas Bag qw4vw