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# axidraw_conf.py
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# Part of the AxiDraw driver software
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#
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# https://github.com/evil-mad/axidraw
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# Version 2.7.0, dated 2020-11-10.
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#
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# Copyright 2020 Windell H. Oskay, Evil Mad Scientist Laboratories
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#
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# https://github.com/evil-mad/AxiDraw
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#
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# "Change numbers here, not there." :)
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'''
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Primary user-adjustable control parameters:
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We encourage you to freely tune these values as needed to match the
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behavior and performance of your AxiDraw to your application and taste.
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These parameters are used as defaults when using AxiDraw with the command-
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line interface (CLI) or with the python library. With the CLI, you can
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make copies of this configuration file and specify a configuration file.
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If you are operating the AxiDraw from within Inkscape, please set your
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preferences within Inkscape, using the AxiDraw Control dialog.
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Most values listed here are ignored when running within Inkscape.
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Similarly, values set within Inkscape are ignored when using the CLI or
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python library.
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'''
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# DEFAULT VALUES
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speed_pendown = 25 # Maximum plotting speed, when pen is down (1-100)
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speed_penup = 75 # Maximum transit speed, when pen is up (1-100)
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accel = 75 # Acceleration rate factor (1-100)
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pen_pos_up = 60 # Height of pen when raised (0-100)
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pen_pos_down = 30 # Height of pen when lowered (0-100)
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pen_rate_raise = 75 # Rate of raising pen (1-100)
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pen_rate_lower = 50 # Rate of lowering pen (1-100)
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pen_delay_up = 0 # Optional delay after pen is raised (ms)
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pen_delay_down = 0 # Optional delay after pen is lowered (ms)
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const_speed = False # Use constant velocity mode when pen is down.
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report_time = False # Report time elapsed.
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default_layer = 1 # Layer(s) selected for layers mode (1-1000).
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copies = 1 # Copies to plot, or 0 for continuous plotting. Default: 1
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page_delay = 15 # Optional delay between copies (s).
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preview = False # Preview mode; simulate plotting only.
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rendering = 3 # Preview mode rendering option (0-3):
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# 0: Do not render previews
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# 1: Render only pen-down movement
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# 2: Render only pen-up movement
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# 3: Render all movement (Default)
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model = 1 # AxiDraw Model (1-4).
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# 1: AxiDraw V2 or V3 (Default).
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# 2: AxiDraw V3/A3 or SE/A3.
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# 3: AxiDraw V3 XLX.
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# 4: AxiDraw MiniKit.
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port = None # Serial port or named AxiDraw to use.
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# None (Default) will plot to first unit located.
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port_config = 0 # Serial port behavior option (0-2)
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# 0: Plot to first unit found, unless port is specified (Default),
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# 1: Plot to first AxiDraw unit located
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# 2: Plot to a specific AxiDraw only, given by port.
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auto_rotate = True # Auto-select portrait vs landscape orientation
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# Default: True
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reordering = 0 # Plot optimization option for how groups are handled
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# 0: Preserve order of objects given in SVG file (Default).
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# 1: Reorder objects, preserving groups
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# 2: Reorder objects, reordering within each group
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# 3: Reorder all objects, breaking apart groups
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resolution = 1 # Resolution: (1-2):
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# 1: High resolution (smoother, slightly slower) (Default)
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# 2: Low resolution (coarser, slightly faster)
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'''
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Additional user-adjustable control parameters:
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Values below this point are configured only in this file, not through the user interface(s).
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'''
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servo_timeout = 60000 # Time, ms, for servo motor to power down
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# after last movement command (default: 60000)
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# This feature requires EBB v 2.5 hardware (with USB
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# micro not USB mini connector) and firmware version
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# 2.6.0 or newer
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check_updates = True # If True, allow AxiDraw Control to check online to see
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# what the current software version is, when you
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# query the version. Set to False to disable. Note that
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# this is the only internet-enabled function in the
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# AxiDraw software.
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smoothness = 10.0 # Curve smoothing (default: 10.0)
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cornering = 10.0 # Cornering speed factor (default: 10.0)
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use_b3_out = False # If True, enable digital output pin B3, which will be high (3.3V)
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# when the pen is down, and low otherwise. Can be used to control
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# external devices like valves, relays, or lasers.
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# Effective motor resolution is approx. 1437 or 2874 steps per inch, in the two modes respectively.
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# Note that these resolutions are defined along the native axes of the machine (X+Y) and (X-Y),
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# not along the XY axes of the machine. This parameter chooses 8X or 16X microstepping on the motors.
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'''
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Secondary control parameters:
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Values below this point are configured only in this file, not through the user interface(s).
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Please note that these values have been carefully chosen, and generally do not need to be
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adjusted in everyday use. That said, proceed with caution, and keep a backup copy.
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'''
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# Page size values typically do not need to be changed. They primarily affect viewpoint and centering.
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# Measured in page pixelssteps. Default printable area for AxiDraw is 300 x 218 mm
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x_travel_default = 11.81 # AxiDraw V2 and AxiDraw V3: X Carriage travel in inches. Default: 300 mm = about 11.81 inches
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y_travel_default = 8.58 # AxiDraw V2 and AxiDraw V3: Y Carriage travel in inches. Default: 218 mm = about 8.58 inches
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x_travel_V3A3 = 16.93 # AxiDraw V3/A3: X Carriage travel in inches. Default: 430 mm = about 16.93 inches
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y_travel_V3A3 = 11.69 # AxiDraw V3/A3: Y Carriage travel in inches. Default: 297 mm = about 11.69 inches
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x_travel_V3XLX = 23.42 # AxiDraw V3 XLX: X Carriage travel in inches. Default: 595 mm = about 23.42 inches
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y_travel_V3XLX = 8.58 # AxiDraw V3 XLX: Y Carriage travel in inches. Default: 218 mm = about 8.58 inches
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x_travel_MiniKit = 6.30 # AxiDraw MiniKit: X Carriage travel in inches. Default: 160 mm = about 6.30 inches
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y_travel_MiniKit = 4.00 # AxiDraw MiniKit: Y Carriage travel in inches. Default: 101.6 mm = 4.00 inches
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#native_res_factor = 1016.0 # Motor resolution calculation factor, steps per inch, and used in conversions. Default: 1016.0
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native_res_factor = 1275.0
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# Note that resolution is defined along native (not X or Y) axes.
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# Resolution is native_res_factor * sqrt(2) steps per inch in Low Resolution (Approx 1437 steps per inch)
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# and 2 * native_res_factor * sqrt(2) steps per inch in High Resolution (Approx 2874 steps per inch)
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max_step_rate = 24.995 # Maximum allowed motor step rate, in steps per millisecond.
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# Note that 25 kHz is the absolute maximum step rate for the EBB.
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# Movement commands faster than this are ignored; may result in a crash (loss of position control).
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# We use a conservative value, to help prevent errors due to rounding.
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# This value is normally used _for speed limit checking only_.
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speed_lim_xy_lr = 15.000 # Maximum XY speed allowed when in Low Resolution mode, in inches per second. Default: 15.000 Max: 17.3958
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speed_lim_xy_hr = 8.6979 # Maximum XY speed allowed when in High Resolution mode, in inches per second. Default: 8.6979, Max: 8.6979
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# Do not increase these values above Max; they are derived from max_step_rate and the resolution.
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max_step_dist_lr = 0.000696 # Maximum distance covered by 1 step in Low Res mode, rounded up, in inches. ~1/(1016 sqrt(2))
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max_step_dist_hr = 0.000348 # Maximum distance covered by 1 step in Hi Res mode, rounded up, in inches. ~1/(2032 sqrt(2))
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# In planning trajectories, we skip movements shorter than these distances, likely to be < 1 step.
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const_speed_factor_lr = 0.25 # When in constant-speed mode, multiply the pen-down speed by this factor. Default: 0.25 for Low Res mode
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const_speed_factor_hr = 0.4 # When in constant-speed mode, multiply the pen-down speed by this factor. Default: 0.4 for Hi Res mode
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start_pos_x = 0 # Parking position, inches. Default: 0
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start_pos_y = 0 # Parking position, inches. Default: 0
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# Acceleration & Deceleration rates:
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accel_rate = 40.0 # Standard acceleration rate, inches per second squared
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accel_rate_pu = 60.0 # Pen-up acceleration rate, inches per second squared
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time_slice = 0.025 # Interval, in seconds, of when to update the motors. Default: time_slice = 0.025 (25 ms)
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bounds_tolerance = 0.003 # Suppress warnings if bounds are exceeded by less than this distance (inches).
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# Allow sufficiently short pen-up moves to be substituted with a pen-down move:
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min_gap = 0.008 # Distance Threshold (inches). Default value: 0.008 inches; smaller than most pen lines.
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# Servo motion limits, in units of (1/12 MHz), about 83 ns:
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servo_max = 27831 # Highest allowed position; "100%" on the scale. Default value: 25200 units, or 2.31 ms.
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servo_min = 9855 # Lowest allowed position; "0%" on the scale. Default value: 10800 units, or 0.818 ms.
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# Note that previous versions of this configuration file used a wider range, 7500 - 28000, corresponding to a range of 625 us - 2333 us.
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# The new limiting values are equivalent to 16%, 86% on that prior scale, giving a little less vertical range, but higher resolution.
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# More importantly, it constrains the servo to within the travel ranges that they are typically calibrated, following best practice.
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skip_voltage_check = False # Set to True if you would like to disable EBB input power voltage checks. Default: False
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clip_to_page = True # Clip plotting area to SVG document size. Default: True
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# the tolerance for determining when the bezier has been segmented enough to plot:
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bezier_segmentation_tolerance = 0.02 / smoothness
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# Tolerance for determining which segments can be merged:
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# Larger values of segment_supersample_tolerance
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# give smoother plotting along paths that began with too many vertices.
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segment_supersample_tolerance = bezier_segmentation_tolerance / 16
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A3 11-3/4" x 16-1/2" 297 x 420 mm
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A4 8-1/4" x 11-3/4" 210 x 297 mm
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8x10 8" x 10" 203 x 254 mm
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dot pixels calculation
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W=format.w/pen_size
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H=format.h/pen_size
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so
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W= 203/0.3 = 676
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H= 254/0.3 = 846
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#!/bin/bash
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# bash threshold.sh input value output
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convert "${1}" -monochrome -white-threshold ${2} +matte -colors 4 -depth 2 "${3}"
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