Description
Use the jit.plur object to performs linear interpolation on incoming matrix frames. This object resamples an image and then interpolates back to the original size.
Examples
Discussion
The resampling process uses two different attributes along each axis of the matrix frame. The _step attributes determine how the frame is divided at output. For instance, with x_step set to 5, there will be a resampled rectangle every 5 cells along the horizontal axis. The _range attributes determine how that resampled rectangle is interpolated. If x_range is less than or greater than x_step, different corner points are used for the interpolation calculation, than are used in the resampling.
When using other interpolation modes modes, the jit.plur object performs a wide variety of variations on theme.
Matrix Operator
| Name | IOProc | Planelink | Typelink | Dimlink | Plane | Dim | Type |
|---|---|---|---|---|---|---|---|
| out | n/a | 1 | 1 | 1 | 1 | 1 | char long float32 float64 |
More about Matrix Operators
The Jitter MOP
Since the matrix is Jitter's focus, it is not surprising that the majority of Jitter objects fall in this category of Matrix Operators. Every Matrix operator has some number of matrix inputs and some number of matrix outputs. Matrix inputs are referred to by the names "in", "in2", "in3", etc., from left to right, and matrix outputs are referred to by the names "out", "out2", "out3", etc., from left to right--i.e. the names are appended by the input/output number except for the first (leftmost) input and first (leftmost) output which are simply named "in" and "out". We will refer to the input or output name names as the "I/O-name".
Matrix inputs and outputs typically each have their own matrices internally where information is kept. This is necessary because Jitter is an asynchronous framework (i.e. all the matrices don't arrive at all inputs at the same time). Various aspects of matrix inputs and outputs can be set using the command [I/O-name] combined with one of the following suffixes: "_dim" which will set the dimensions of the specified I/O matrix, "_type" which will set the type of the specified matrix, "_planecount" which will set the plane of the specified matrix, or "_name" which will set the name of the specified matrix. There is one special case which does not have an internal matrix and this is the first input "in". This is the case since this special input actually triggers the calculation of the matrix operator, so it doesn't need to be cached until a calulation takes place, unlike the other inputs. Therefore there is no mechanism to set the dim, planecount, type, or name of "in".
Matrix operators accept what we'll refer to as "matrix args"--i.e. [planecount (int)] [ type (symbol)] [dim (int list)]. if these arguments are present, the adapt attribute will be turned off, otherwise it will be turned on. If adapt mode is turned on, each time a matrix is received in the first input, there will also be the equivalent of setting the dim, planecount, and type attributes to that of the input matrix. If the other inputs and outputs are linked to these attributes, this will affect their linked attributes as well. See the "MOP" table to determine which inputs and outputs will be linked to which attributes when adapt mode is turned on. For the leftmost input this is not applicable, and hence all columns are labelled "n/a".
The jit.matrix object is a named matrix which may be used to matrix data storage and retrieval, resampling, and matrix type and planecount conversion operations.
MOP Arguments
planecount [int]
Explicitly sets the number of planes for the output and any righthand inputs. If this is absent, the Matrix Operator will typically adapt to the lefthand incoming matrix attributes, except for special case operators.
type [symbol]
Explicitly sets the type of the matrix for the output and any righthand inputs. If this is absent, the Matrix Operator will typically adapt to the lefthand incoming matrix attributes, except for special case operators.
dimensions [list]
Explicitly sets the dimensions of the matrix for the output and any righthand inputs. If this is absent, the Matrix Operator will typically adapt to the lefthand incoming matrix attributes, except for special case operators.
MOP Attributes
adapt [int]
Matrix adaptation flag (default = 0 if matrix arguments are present, otherwise 1) When the flag is set, the jit.matrix object will adapt to the incoming matrix planecount, type, and dimensions.
[in/out]_dim [32 ints]
The matrix data dimensions (default = 1 1)
[in/out]_name [symbol]
The input or output name of the matrix (default = UID)
[in/out]_planecount [int]
The number of planes in matrix input our output data. Except in special cases, this value is equal to the planecount.
[in/out]_type [symbol]
The input or output matrix data type. Except in special cases, this value is equal to type.
[in/out]_type [symbol]
The input or output matrix data type. Except in special cases, this value is equal to type.
outputmode [int]
Output mode (default = 1 (calculate and output matrix))
0 = No output
1 = Calculate and output the matrix
2 = Pass input (no calculation)
3 = Pass output (no calculation)
type [int]
The matrix data type (default = char
Supported data types are char, long, float32, or float64.
MOP Messages
bang
clear
exportattrs
Arguments
getattributes
getstate
importattrs
Arguments
jit_matrix
Arguments
outputmatrix
summary
Attributes
colormode [int]
Color wrapping mode (default = 0 (wrap))
0 = wrap: Values that exceed the limits are wrapped around to the opposite limit with a modulo operation. (256 wraps to 0, 257 wraps to 1, and -1 wraps to 255, -2 wraps to 254, etc.)
1 = clip: Values are limited not to exceed min or max. (E.g. numbers greater than 255 are set to 255, and numbers less than 0 are set to 0.)
2 = bounce: Values that exceed the limits are folded back in the opposite direction. (256 is folded back to 254, 257 is folded back to 253, and -1 is folded back to 1, -2 to 2, etc.)
gang [int]
Range value flag (default = 1) When the flag is set, the x_range and y_range values are used. Otherwise, the x_step and y_step values are used instead.
hi [float]
The upper output range limit (default = 1.)
lo [float]
The lower output range limit (default = 0.)
mode [int]
Interpolation mode (default = 0 (linear))
0 = linear interpolation
1 - 15 = interpolation variations (Try 'em and see!)
scale [int]
The amount of bit shift before output (default = 8)
x_range [int]
The horizontal distance between corner points used for interpolation (default = 2)
x_step [int]
The horizontal distance between resampled corner points (default = 2)
y_range [int]
The vertical distance between corner points used for interpolation (default = 2)
y_step [int]
The vertical distance between resampled corner points (default = 2)
Common Box Attributes
annotation [symbol]
Sets the text that will be displayed in the Clue window when the user moves the mouse over the object.
background [int] (default: 0)
Adds or removes the object from the patcher's background layer. background 1 adds the object to the background layer, background 0 removes it. Objects in the background layer are shown behind all objects in the default foreground layer.
color [4 floats]
Sets the color for the object box outline.
fontface [int]
Sets the type style used by the object. The options are:
plain
bold
italic
bold italic
Possible values:
0 = 'regular'
1 = 'bold'
2 = 'italic'
3 = 'bold italic'
fontname [symbol]
Sets the object's font.
fontsize [float]
Sets the object's font size (in points).
Possible values:
'8'
'9'
'10'
'11'
'12'
'13'
'14'
'16'
'18'
'20'
'24'
'30'
'36'
'48'
'64'
'72'
hidden [int] (default: 0)
Toggles whether an object is hidden when the patcher is locked.
hint [symbol]
Sets the text that will be displayed in as a pop-up hint when the user moves the mouse over the object in a locked patcher.
ignoreclick [int] (default: 0)
Toggles whether an object ignores mouse clicks in a locked patcher.
patching_rect [4 floats] (default: 0. 0. 100. 0.)
Sets the position and size of the object in the patcher window.
position [2 floats]
Sets the object's x and y position in both patching and presentation modes (if the object belongs to its patcher's presentation), leaving its size unchanged.
presentation [int] (default: 0)
Sets whether an object belongs to the patcher's presentation.
presentation_rect [4 floats] (default: 0. 0. 0. 0.)
Sets the x and y position and width and height of the object in the patcher's presentation, leaving its patching position unchanged.
rect [4 floats]
Sets the x and y position and width and height of the object in both patching and presentation modes (if the object belongs to its patcher's presentation).
size [2 floats]
Sets the object's width and height in both patching and presentation modes (if the object belongs to its patcher's presentation), leaving its position unchanged.
textcolor [float]
Sets the color for the object's text in RGBA format.
textjustification [int]
Text Justification
Possible values:
0 = 'left'
1 = 'center'
2 = 'right'
varname [symbol]
Sets the patcher's scripting name, which can be used to address the object by name in pattr, scripting messages to thispatcher, and the js object.
See Also
| Name | Description |
|---|---|
| Working with Video in Jitter | Working with Video in Jitter |
| jit.ameba | Downsample/upsample with non-obvious results |