Painting in Max/MSP with various brush styles.

By Nesa Popov

From this post:

Screen Shot 2015-04-05 at 4.23.28 PM

The brush styles are contained in the frames of a Quicktime movie.

Also see “Harmony drawing App”


This patch was copied from the Cycling74 forum and is distributed without permission of the author.

Folder: brushtips

patch: brushtips.maxpat


Various methods of separating foreground from background.

Making Connections, Camera data (Max)

By Andrew Benson 

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By Jean-Marc Pelletier


Extract edge pixels from a binary image


Isolate a single connected component from a binary image

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(a sock-monkey)

Kinect (depth camera)


by Ryan Challinor

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(Using jit.synapse from: – Can you find the sock monkey?)

See yourself in Code

“Commissioned for the BBC’s make it digital event, the brief was ‘to get children into code’. My installation downloaded the event’s twitter feed in real time and displayed the page’s body text inside the bodies of passing people. Moving their hands around allowed people to scroll through the html/js/CSS.”

By Robin Price



This project uses:

  • maxurl
  • jit.openni
  • kinect

cv.jit revisited

Jitter computer vision library

By Jean-Marc Pelletier

Screen Shot 2015-03-23 at 2.24.37 AM

Several examples you can try by running the “help” files. All of the explanatory text below is by Jean-Marc Pelletier.


The utility abstraction cv.jit.blobs.elongation.draw superimposes elongation values on the image sent to its right inlet. You MUST also connect the output of cv.jit.blobs.moments to its middle inlet. You can use the attribute “frgb” to set the colour used.

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Marks as ON only pixels that are themselves ON and have a least one OFF neighbour. In other words, it returns only the edges in a binary image.

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cv.jit.blobs.bounds offers similar functionality to jit.findbounds but finds the bounding box for every blob in a labeled image.

cv.jit.blobs.bounds outputs a 4-plane 1-dimension float32 matrix whose number of cells is the same as the number of blobs in the input image.

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cv.jit.blobs.centroids functions much like cv.jit.centroids except that it takes for input the output of cv.jit.label and calculates the center of mass and area of each connected component individually.

The output of cv.jit.label must be of type char.

cv.jit.blobs outputs a single-row, 3-plane char matrix where the number of cells is the same as the number of labeled components.

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cv.jit.blobs.direction is almost identical to cv.jit.blobs.orientation. It also takes in the output of cv.jit.blobs.moments and calculates the orientation of each blob’s main axis. However, unlike cv.jit.blobs.orientation, it takes into account symmetry. This means that cv.jit.blobs.direction can tell which direction a connected component is pointing.

Like cv.jit.blobs.orientation, the output is in radians by default and can be changed to degrees with the “mode” attribute. The output is between 0 and 2Pi.

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cv.jit.blobs.moments functions much like cv.jit.moments but computes moments and invariants for every blob identified by cv.jit.label. See cv.jit.moments for a discussion on moments and invariants.

The output is a 17-plane, single-row float32 matrix. The number of cells is the same as the number of connected components.

The output of cv.jit.moments can be fed to other objects for further analysis. See cv.jit.blobs.orientation, cv.jit.blobs.direction, cv.jit.blobs.elongation, and cv.jit.blobs.recon.

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cv.jit.blobs.orientation functions much like cv.jit.orientation except that it takes for input the output of cv.jit.blobs.moments and calculates the orientation of the main axis of each connected component individually.

cv.jit.blobs.orientation outputs a single-row, 1-plane char matrix where the number of cells is the same as the number of labeled components.

Orientation is measured in radians by default but you can switch to degree output by specifying “mode 1”. The values are between 0. and Pi radians, with the extremes being horizontal and Pi/2 vertical.

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cv.jit.blobs.recon calculates the statistical distance between blob shape descriptors and a pre-computed model. The model must be created using cv.jit.learn, and cv.jit.blobs.recon functions much like cv.jit.learn’s “compare” mode.

cv.jit.blobs.recon must be fed the output of cv.jit.blobs.moments. Use the “mode” attribute to set whether moments (0) or Hu invariants (1) are used. Make sure that this matches the data used to train the model.

The output is a 1-plane float32 matrix, in which each cell contains the statistical distance between the corresponding blob and the model.. The lower the output value, the more similar the blob’s shape is to the model.

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Basis function generator

jit.bfg provides basis functions including various noise contours.

Here is yet another example co-opted from dude837 tutorial 30:

This is a set of color bars composited with a noise gradient.

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Original components:



Noise gradient function

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A few minor changes were made to the original patch, including addition of comments and presets.


folder: bfg

patch: dude837-tut30-tz.maxpat

Physics simulation driven by audio

From tutorial 21b by dude837

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What’s different?

There was a problem with the spheres not returning to the resting position. They were constantly expanded outward. By removing the frame rate trigger from qmetro, and triggering only when audio data is received, the response was improved. You can also set signal amplitude going into the bonk~ object.

Screen Shot 2015-03-23 at 1.45.47 AM


Folder: physics

Project: bumper-phsyics

External objects: bonk~ from: