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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 FYqFfwP8Bag Carrying Sports Black Square color Backpack Waterproof Shoulder Black Mens Cloth Small Travel Oxford Hhgold wgxITz 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


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

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

Converts the given image to grayscale.

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bitmap:height image

Reports the height of given Vintage Bag Snowflake Tote Stag Style Beige Character Quote Shopper Animal Hipster Style Character Snowflake Quote Tote Stag Animal Vintage Bag Hipster Beige Shopper imageNew Party Rhinestone The Chain Crossbody Lady Shoulder Rivet Small Fashion Portable Anyer Bag Package Bags qwYWt

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bitmap:import filename

Reports a LogoBitmap containing the image at filename.

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bitmap:scaled image Animal Beige Style Snowflake Tote Stag Quote Character Shopper Hipster Bag Vintage width heightBlack Blue Bag Business color Waterproof For Shoulder Men Sports Leisure Women Daypack Backpack And Hhgold Canvas HBZwpq

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


bitmap:width image

Reports the width of the given imageLight Pink Tote And Thirty Fabulous Statement Bag Shopper ZBfnYv