Commands.md

October 10, 2025 ยท View on GitHub

Extension commands:

test

Simple OpenCV test

Matrix :spec

Initialize new cvMat class

  • spec [pair! handle! image! block!]

VideoCapture :src

Initialize new VideoCapture class

  • src [integer! file! string!]

VideoWriter :src :codec :fps :size

Initialize new VideoWriter class

  • src [integer! file! string!]
  • codec [integer!] 4-character code of codec used to compress the frames (mp4ra.org/#/codecs)
  • fps [number!] Framerate of the created video stream
  • size [pair!] Size of the video frames

free :class

Release OpenCV handle

  • class [handle!] Mat, VideoCapture or VideoWriter

get-property :obj :property

Returns a property value

  • obj [handle!] VideoCapture handle
  • property [integer!]

set-property :obj :property :value

  • obj [handle!] VideoCapture handle
  • property [integer!]
  • value [number!]

read :src

Grabs, decodes and returns the next video frame

  • src [handle!] VideoCapture
  • /into Optional existing Mat handle
  • dst [handle!] Mat

write :dst :frame

Writes the next video frame

  • dst [handle!] VideoWriter
  • frame [image! handle!]

imread :src

  • src [file! string!] Loads an image from a file.
  • /image As Rebol image instead of default cvMat
  • /with Flag that can take values IMREAD_*
  • flags [integer!] Default is IMREAD_UNCHANGED

imreadmulti :src

  • src [file! string!] Loads a multi-page image from a file.
  • /image As Rebol images instead of default cvMat
  • /with Flag that can take values IMREAD_*
  • flags [integer!] Default is IMREAD_UNCHANGED

imwrite :name :image

Saves an image to a specified file.

  • name [any-string!]
  • image [image! handle!] Image or cvMat handle
  • /with Format-specific parameters encoded as pairs
  • params [block!] integer pairs (words are resolved)

resize :image :size

Resizes an image.

  • image [image! handle!] Image or cvMat handle
  • size [pair! percent!]
  • /into
  • target [handle!] cvMat
  • /with
  • interpolation [integer!]

bilateralFilter :src :dst :diameter :sigmaColor :sigmaSpace

Applies the bilateral filter to an image.

  • src [handle!] Source 8-bit or floating-point, 1-channel or 3-channel image.
  • dst [handle! none!] Destination image of the same size and type as src.
  • diameter [integer!] Diameter of each pixel neighborhood that is used during filtering. If it is non-positive, it is computed from sigmaSpace.
  • sigmaColor [number!]
  • sigmaSpace [number!]
  • /border border mode used to extrapolate pixels outside of the image
  • type [integer!] one of: [0 1 2 4 5 16]

blur :src :dst :size

Blurs an image using the normalized box filter.

  • src [handle!] cvMat handle
  • dst [handle! none!]
  • size [pair! integer!] blurring kernel size
  • /border border mode used to extrapolate pixels outside of the image
  • type [integer!] one of: [0 1 2 4 5 16]

dilate :src :dst :kernel :anchor :iterations

Dilates an image by using a specific structuring element.

  • src [handle!] cvMat
  • dst [handle! none!] cvMat
  • kernel [handle!]
  • anchor [pair! integer!] position of the anchor within the element
  • iterations [integer!] number of times dilation is applied

erode :src :dst :kernel :anchor :iterations

Erodes an image by using a specific structuring element.

  • src [handle!] cvMat
  • dst [handle! none!] cvMat
  • kernel [handle!]
  • anchor [pair! integer!] position of the anchor within the element
  • iterations [integer!] number of times dilation is applied

filter2D :src :dst :ddepth :kernel :anchor :delta

Convolves an image with the kernel.

  • src [handle!] cvMat
  • dst [handle! none!] cvMat
  • ddepth [integer!] desired depth of the destination image
  • kernel [handle!] convolution kernel (or rather a correlation kernel), a single-channel floating point matrix
  • anchor [pair! integer!] position of the anchor within the element
  • delta [number!] value added to the filtered pixels before storing them in dst
  • /border border mode used to extrapolate pixels outside of the image
  • type [integer!] one of: [0 1 2 4 5 16]

GaussianBlur :src :dst :size :sigmaX :sigmaY

Blurs an image using a Gaussian filter.

  • src [handle!] cvMat
  • dst [handle! none!] cvMat
  • size [pair! integer!] blurring kernel size
  • sigmaX [number!]
  • sigmaY [number!]
  • /border border mode used to extrapolate pixels outside of the image
  • type [integer!] one of: [0 1 2 4 5 16]

getGaborKernel :ksize :sigma :theta :lambd :gamma :psi :ktype

Returns Gabor filter coefficients.

  • ksize [pair!] Size of the filter returned
  • sigma [number!] Standard deviation of the gaussian envelope
  • theta [number!] Orientation of the normal to the parallel stripes of a Gabor function.
  • lambd [number!] Wavelength of the sinusoidal factor
  • gamma [number!] Spatial aspect ratio
  • psi [number!] Phase offset
  • ktype [integer!] Type of filter coefficients. It can be CV_32F or CV_64F

getStructuringElement :shape :ksize :anchor

Returns a structuring element of the specified size and shape for morphological operations.

  • shape [integer!] Element shape that could be one of MorphShapes (rect = 0, cross = 1, ellipse = 2)
  • ksize [pair! integer!] Size of the structuring element
  • anchor [pair! integer!] Anchor position within the element

Laplacian :src :dst :ddepth :ksize :scale :delta

Calculates the Laplacian of an image.

  • src [handle!] Source image
  • dst [handle! none!] Destination image of the same size and the same number of channels as src
  • ddepth [number!] Desired depth of the destination image
  • ksize [number!] Aperture size used to compute the second-derivative filters. The size must be positive and odd.
  • scale [number!] Scale factor for the computed Laplacian values.
  • delta [number!] Optional delta value that is added to the results prior to storing them in dst.

medianBlur :src :dst :size

Blurs an image using the median filter.

  • src [handle!] input 1-, 3-, or 4-channel image; when ksize is 3 or 5, the image depth should be CV_8U, CV_16U, or CV_32F, for larger aperture sizes, it can only be CV_8U
  • dst [handle! none!] destination array of the same size and type as src
  • size [number!] aperture linear size; it must be odd and greater than 1, for example: 3, 5, 7...

cvtColor :src :dst :code

Converts an image from one color space to another.

  • src [handle!] source cvMat handle
  • dst [handle! none!] destination cvMat
  • code [integer!]

applyColorMap :src :dst :colormap

Applies a GNU Octave/MATLAB equivalent colormap on a given image.

  • src [handle!] source cvMat handle
  • dst [handle! none!] destination cvMat
  • colormap [integer!]

threshold :src :dst :thresh :maxval :type

Applies a fixed-level threshold to each array element.

  • src [handle!]
  • dst [handle! none!]
  • thresh [number!]
  • maxval [number!]
  • type [integer!]

absdiff :src1 :src2 :dst

Calculates the per-element absolute difference between two arrays

  • src1 [handle!] cvMat
  • src2 [handle!] cvMat
  • dst [handle! none!] cvMat

add :src1 :src2 :dst

Calculates the per-element sum of two arrays.

  • src1 [handle!] cvMat
  • src2 [handle!] cvMat
  • dst [handle! none!] cvMat
  • /mask
  • m [handle!] cvMat

addWeighted :src1 :alpha :src2 :beta :gamma :dst

Calculates the weighted sum of two arrays.

  • src1 [handle!] cvMat
  • alpha [number!] weight of the first array elements.
  • src2 [handle!] cvMat
  • beta [number!] weight of the second array elements.
  • gamma [number!] scalar added to each sum.
  • dst [handle! none!] cvMat

bitwise-and :src1 :src2 :dst

Computes bitwise conjunction of the two arrays (dst = src1 & src2)

  • src1 [handle!] cvMat
  • src2 [handle!] cvMat
  • dst [handle! none!] cvMat
  • /mask
  • m [handle!] cvMat

bitwise-not :src :dst

Inverts every bit of an array.

  • src [handle!] cvMat
  • dst [handle! none!] cvMat
  • /mask
  • m [handle!] cvMat

bitwise-or :src1 :src2 :dst

Calculates the per-element bit-wise disjunction of two arrays or an array and a scalar.

  • src1 [handle!] cvMat
  • src2 [handle!] cvMat
  • dst [handle! none!] cvMat
  • /mask
  • m [handle!] cvMat

bitwise-xor :src1 :src2 :dst

Calculates the per-element bit-wise "exclusive or" operation on two arrays or an array and a scalar.

  • src1 [handle!] cvMat
  • src2 [handle!] cvMat
  • dst [handle! none!] cvMat
  • /mask
  • m [handle!] cvMat

convertScaleAbs :src :dst :alpha :beta

Scales, calculates absolute values, and converts the result to 8-bit.

  • src [handle!] cvMat
  • dst [handle! none!] cvMat
  • alpha [number!] default = 1
  • beta [number!]

divide :src1 :src2 :dst

Calculates the per-element division of two arrays.

  • src1 [handle!] cvMat
  • src2 [handle!] cvMat
  • dst [handle! none!] cvMat
  • /scale scalar factor
  • s [number!] default = 1

flip :src :dst :flipCode

Flips a 2D array around vertical, horizontal, or both axes.

  • src [handle!] cvMat
  • dst [handle! none!] cvMat
  • flipCode [integer!] a flag to specify how to flip the array; 0 means flipping around the x-axis and positive value (for example, 1) means flipping around y-axis. Negative value (for example, -1) means flipping around both axes

invert :src :dst :flags

Finds the inverse or pseudo-inverse of a matrix.

  • src [handle!] Input floating-point M x N matrix.
  • dst [handle! none!] Output matrix of N x M size and the same type as src.
  • flags [integer!] Inversion method; One of DecompTypes (DECOMP_*)

max :src1 :src2 :dst

Calculates per-element maximum of two arrays.

  • src1 [handle!] cvMat
  • src2 [handle!] cvMat
  • dst [handle! none!] cvMat

mean :src

Calculates an average (mean) of array elements.

  • src [handle!] cvMat

min :src1 :src2 :dst

Calculates per-element minimum of two arrays.

  • src1 [handle!] cvMat
  • src2 [handle!] cvMat
  • dst [handle! none!] cvMat

minMaxLoc :src

Finds the global minimum and maximum in an array.

  • src [handle!] input single-channel array (cvMat)

multiply :src1 :src2 :dst

Calculates the per-element scaled product of two arrays.

  • src1 [handle!] cvMat
  • src2 [handle!] cvMat
  • dst [handle! none!] cvMat
  • /scale scalar factor
  • s [number!] default = 1

normalize :src :dst :alpha :beta :norm_type

Calculates the per-element scaled product of two arrays.

  • src [handle!] cvMat
  • dst [handle! none!] cvMat
  • alpha [number!] norm value to normalize to or the lower range boundary in case of the range normalization
  • beta [number!] upper range boundary in case of the range normalization; it is not used for the norm normalization
  • norm_type [integer!] normalization type
  • /mask
  • m [handle!] optional operation mask

subtract :src1 :src2 :dst

Calculates the per-element difference between two arrays.

  • src1 [handle!] cvMat
  • src2 [handle!] cvMat
  • dst [handle! none!] cvMat
  • /mask
  • m [handle!] cvMat

transform :src :dst :m

Performs the matrix transformation of every array element.

  • src [handle!] cvMat
  • dst [handle! none!] cvMat
  • m [handle!] transformation 2x2 or 2x3 floating-point matrix.

convertTo :src :dst :type :alpha :beta

Converts an array to another data type with optional scaling.

  • src [handle!] cvMat
  • dst [handle! none!] cvMat
  • type [integer! word!] desired output matrix type or, rather, the depth since the number of channels are the same as the input has; if rtype is negative, the output matrix will have the same type as the input
  • alpha [number!] scale factor
  • beta [number!] delta added to the scaled values

Canny :src :dst :threshold1 :threshold2

Finds edges in an image using the Canny algorithm

  • src [handle!] 8-bit input image
  • dst [handle! none!] output edge map; single channels 8-bit image, which has the same size as image
  • threshold1 [number!] first threshold for the hysteresis procedure
  • threshold2 [number!] second threshold for the hysteresis procedure

startWindowThread

imshow :src

Displays an image in the specified window.

  • src [image! handle!] Image or cvMat handle
  • /name Optional window name
  • window [any-string!]

pollKey

Polls for a pressed key.

waitKey :delay

Waits for a pressed key.

  • delay [integer!] In millisecons; infinitely when <=0

namedWindow :name

Creates a window.

  • name [any-string!]

resizeWindow :window :size

Resizes the window to the specified size.

  • window [any-string!]
  • size [pair!]

moveWindow :window :pos

Moves the window to the specified position.

  • window [any-string!]
  • pos [pair!]

getWindowImageSize :window

Provides size of image in the window (not counting tarckbars and other controls).

  • window [any-string!]

getWindowImagePos :window

Provides position (left-bottom) of image in the window.

  • window [any-string!]

getWindowProperty :name :property

Provides parameters of a window.

  • name [any-string!]
  • property [integer!]

setWindowProperty :name :property :value

Changes parameters of a window dynamically.

  • name [any-string!]
  • property [integer!]
  • value [number!]

setWindowTitle :name :title

Updates window title.

  • name [any-string!] Name of the window
  • title [any-string!] New title

destroyAllWindows

Destroys all of the HighGUI windows.

destroyWindow :window

Destroys the specified window.

  • window [any-string!]

createTrackbar :trackbarname :window :count

  • trackbarname [any-string!]
  • window [any-string!]
  • count [integer!] Maximal position of the slider. The minimal position is always 0.
  • /with
  • ctx [object!] Callback's context
  • func [word!] Callback function name

setTrackbarMax :trackbar :value

Sets the trackbar maximum position.

  • trackbar [handle!] cvTrackbar
  • value [integer!] New maximum position.

setTrackbarMin :trackbar :value

Sets the trackbar minimum position.

  • trackbar [handle!] cvTrackbar
  • value [integer!] New minimum position.

setTrackbarPos :trackbar :value

Sets the trackbar position.

  • trackbar [handle!] cvTrackbar
  • value [integer!] New position.

getTrackbarPos :trackbar

Gets the trackbar position.

  • trackbar [handle!] cvTrackbar

selectROI :src

Allows users to select a ROI on the given image.

  • src [image! handle!] Image or cvMat handle

setMouseCallback :window :context :word

Sets mouse handler for the specified window.

  • window [any-string!]
  • context [object!] Function context
  • word [word! none!] Function name

getTickCount

Returns the number of ticks.

getTickFrequency

Returns the number of ticks per second.

getNumThreads

Returns the number of threads used by OpenCV for parallel regions.

getVersionString

Returns library version string.

getBuildInformation

Returns full configuration time cmake output.

useOptimized

Returns the status of optimized code usage.

setUseOptimized :onoff

Enables or disables the optimized code.

  • onoff [logic!]

qrcode-encode :text

Encode string to an image.

  • text [any-string!]
  • /version Symbol version of QR Code range
  • v [integer!] 1 - 40
  • /mode Encoding mode
  • m [integer!]
  • /correction Approximate error correction level (low, medium, quartile, high)
  • level [integer!] 0 - 3 (default is 0)

qrcode-decode :image

Decode string from an image with a QRcode

  • image [image! handle! file!] Image or cvMat handle

Used handles and its getters / setters

CVMAT - OpenCV Matrix

;Refinement       Gets                Sets                          Description
/size             pair!               none                          "2D size of a matrix element"
/type             word!               none                          "Type of a matrix element"
/depth            word!               none                          "Depth of a matrix element"
/channels         integer!            none                          "Number of channels"
/binary           binary!             none                          "Binary"
/image            image!              none                          "Image"
/vector           vector!             none                          "Vector"
/total            integer!            none                          "Number of array elements (a number of pixels if the array represents an image)"
/is-submatrix     logic!              none                          "Returns true if the matrix is a submatrix of another matrix"
/width            integer!            none                          "Width of the Matrix"
/height           integer!            none                          "Height of the Matrix"

CVVIDEOCAPTURE - Class for video capturing from video files, image sequences or cameras

;Refinement       Gets                Sets                          Description
/pos-ms           decimal!            none                          "Current position of the video file in milliseconds"
/pos-frame        decimal!            none                          "0-based index of the frame to be decoded/captured next"
/pos-ratio        decimal!            none                          "Relative position of the video file: 0=start of the film, 1=end of the film"
/width            integer!            none                          "Width of the frames in the video stream"
/height           integer!            none                          "Height of the frames in the video stream"
/fps              decimal!            none                          "Frame rate"
/fourcc           decimal!            none                          "4-character code of codec"
/frames           integer!            none                          "Number of frames in the video file"
/format           word!               none                          "Format of the Mat objects"

CVMOUSECALLBACK - Mouse callback state

;Refinement       Gets                Sets                          Description
/x                integer!            none                          "Last mouseX position"
/y                integer!            none                          "Last mouseY position"
/pos              pair!               none                          "Last mouse position as pair"
/flags            integer!            none                          "Last mouse event flags"

Other extension values:

; imread flags..
IMREAD_UNCHANGED: -1
IMREAD_GRAYSCALE: 0
IMREAD_COLOR: 1
IMREAD_ANYDEPTH: 2
IMREAD_ANYCOLOR: 4
IMREAD_LOAD_GDAL: 8
IMREAD_REDUCED_GRAYSCALE_2: 16
IMREAD_REDUCED_COLOR_2: 17
IMREAD_REDUCED_GRAYSCALE_4: 32
IMREAD_REDUCED_COLOR_4: 33
IMREAD_REDUCED_GRAYSCALE_8: 64
IMREAD_REDUCED_COLOR_8: 65
IMREAD_IGNORE_ORIENTATION: 128

; imwrite params..
IMWRITE_JPEG_QUALITY: 1
IMWRITE_JPEG_PROGRESSIVE: 2
IMWRITE_JPEG_OPTIMIZE: 3
IMWRITE_JPEG_RST_INTERVAL: 4
IMWRITE_JPEG_LUMA_QUALITY: 5
IMWRITE_JPEG_CHROMA_QUALITY: 6
IMWRITE_JPEG_SAMPLING_FACTOR: 7
IMWRITE_PNG_COMPRESSION: 16
IMWRITE_PNG_STRATEGY: 17
IMWRITE_PNG_BILEVEL: 18
IMWRITE_PXM_BINARY: 32
IMWRITE_EXR_TYPE: 48
IMWRITE_EXR_COMPRESSION: 49
IMWRITE_WEBP_QUALITY: 64
IMWRITE_PAM_TUPLETYPE: 128
IMWRITE_TIFF_RESUNIT: 256
IMWRITE_TIFF_XDPI: 257
IMWRITE_TIFF_YDPI: 258
IMWRITE_TIFF_COMPRESSION: 259
IMWRITE_JPEG2000_COMPRESSION_X1000: 272

; ImwritePNGFlags
IMWRITE_PNG_STRATEGY_DEFAULT:      0
IMWRITE_PNG_STRATEGY_FILTERED:     1
IMWRITE_PNG_STRATEGY_HUFFMAN_ONLY: 2
IMWRITE_PNG_STRATEGY_RLE:          3
IMWRITE_PNG_STRATEGY_FIXED:        4

; BorderTypes
BORDER_CONSTANT: 0
BORDER_REPLICATE: 1
BORDER_REFLECT: 2
BORDER_WRAP: 3
BORDER_REFLECT_101: 4
BORDER_TRANSPARENT: 5
BORDER_REFLECT101: BORDER_REFLECT_101
BORDER_DEFAULT: BORDER_REFLECT_101
BORDER_ISOLATED: 16

; ColorConversionCodes
COLOR_BGR2BGRA: 0
COLOR_RGB2RGBA: COLOR_BGR2BGRA
COLOR_BGRA2BGR: 1
COLOR_RGBA2RGB: COLOR_BGRA2BGR
COLOR_BGR2RGBA: 2
COLOR_RGB2BGRA: COLOR_BGR2RGBA
COLOR_RGBA2BGR: 3
COLOR_BGRA2RGB: COLOR_RGBA2BGR
COLOR_BGR2RGB: 4
COLOR_RGB2BGR: COLOR_BGR2RGB
COLOR_BGRA2RGBA: 5
COLOR_RGBA2BGRA: COLOR_BGRA2RGBA
COLOR_BGR2GRAY: 6
COLOR_RGB2GRAY: 7
COLOR_GRAY2BGR: 8
COLOR_GRAY2RGB: COLOR_GRAY2BGR
COLOR_GRAY2BGRA: 9
COLOR_GRAY2RGBA: COLOR_GRAY2BGRA
COLOR_BGRA2GRAY: 10
COLOR_RGBA2GRAY: 11
COLOR_BGR2BGR565: 12
COLOR_RGB2BGR565: 13
COLOR_BGR5652BGR: 14
COLOR_BGR5652RGB: 15
COLOR_BGRA2BGR565: 16
COLOR_RGBA2BGR565: 17
COLOR_BGR5652BGRA: 18
COLOR_BGR5652RGBA: 19
COLOR_GRAY2BGR565: 20
COLOR_BGR5652GRAY: 21
COLOR_BGR2BGR555: 22
COLOR_RGB2BGR555: 23
COLOR_BGR5552BGR: 24
COLOR_BGR5552RGB: 25
COLOR_BGRA2BGR555: 26
COLOR_RGBA2BGR555: 27
COLOR_BGR5552BGRA: 28
COLOR_BGR5552RGBA: 29
COLOR_GRAY2BGR555: 30
COLOR_BGR5552GRAY: 31
COLOR_BGR2XYZ: 32
COLOR_RGB2XYZ: 33
COLOR_XYZ2BGR: 34
COLOR_XYZ2RGB: 35
COLOR_BGR2YCrCb: 36
COLOR_RGB2YCrCb: 37
COLOR_YCrCb2BGR: 38
COLOR_YCrCb2RGB: 39
COLOR_BGR2HSV: 40
COLOR_RGB2HSV: 41
COLOR_BGR2Lab: 44
COLOR_RGB2Lab: 45
COLOR_BGR2Luv: 50
COLOR_RGB2Luv: 51
COLOR_BGR2HLS: 52
COLOR_RGB2HLS: 53
COLOR_HSV2BGR: 54
COLOR_HSV2RGB: 55
COLOR_Lab2BGR: 56
COLOR_Lab2RGB: 57
COLOR_Luv2BGR: 58
COLOR_Luv2RGB: 59
COLOR_HLS2BGR: 60
COLOR_HLS2RGB: 61
COLOR_BGR2HSV_FULL: 66
COLOR_RGB2HSV_FULL: 67
COLOR_BGR2HLS_FULL: 68
COLOR_RGB2HLS_FULL: 69
COLOR_HSV2BGR_FULL: 70
COLOR_HSV2RGB_FULL: 71
COLOR_HLS2BGR_FULL: 72
COLOR_HLS2RGB_FULL: 73
COLOR_LBGR2Lab: 74
COLOR_LRGB2Lab: 75
COLOR_LBGR2Luv: 76
COLOR_LRGB2Luv: 77
COLOR_Lab2LBGR: 78
COLOR_Lab2LRGB: 79
COLOR_Luv2LBGR: 80
COLOR_Luv2LRGB: 81
COLOR_BGR2YUV: 82
COLOR_RGB2YUV: 83
COLOR_YUV2BGR: 84
COLOR_YUV2RGB: 85
COLOR_YUV2RGB_NV12: 90
COLOR_YUV2BGR_NV12: 91
COLOR_YUV2RGB_NV21: 92
COLOR_YUV2BGR_NV21: 93
COLOR_YUV420sp2RGB: COLOR_YUV2RGB_NV21
COLOR_YUV420sp2BGR: COLOR_YUV2BGR_NV21
COLOR_YUV2RGBA_NV12: 94
COLOR_YUV2BGRA_NV12: 95
COLOR_YUV2RGBA_NV21: 96
COLOR_YUV2BGRA_NV21: 97
COLOR_YUV420sp2RGBA: COLOR_YUV2RGBA_NV21
COLOR_YUV420sp2BGRA: COLOR_YUV2BGRA_NV21
COLOR_YUV2RGB_YV12: 98
COLOR_YUV2BGR_YV12: 99
COLOR_YUV2RGB_IYUV: 100
COLOR_YUV2BGR_IYUV: 101
COLOR_YUV2RGB_I420: COLOR_YUV2RGB_IYUV
COLOR_YUV2BGR_I420: COLOR_YUV2BGR_IYUV
COLOR_YUV420p2RGB: COLOR_YUV2RGB_YV12
COLOR_YUV420p2BGR: COLOR_YUV2BGR_YV12
COLOR_YUV2RGBA_YV12: 102
COLOR_YUV2BGRA_YV12: 103
COLOR_YUV2RGBA_IYUV: 104
COLOR_YUV2BGRA_IYUV: 105
COLOR_YUV2RGBA_I420: COLOR_YUV2RGBA_IYUV
COLOR_YUV2BGRA_I420: COLOR_YUV2BGRA_IYUV
COLOR_YUV420p2RGBA: COLOR_YUV2RGBA_YV12
COLOR_YUV420p2BGRA: COLOR_YUV2BGRA_YV12
COLOR_YUV2GRAY_420: 106
COLOR_YUV2GRAY_NV21: COLOR_YUV2GRAY_420
COLOR_YUV2GRAY_NV12: COLOR_YUV2GRAY_420
COLOR_YUV2GRAY_YV12: COLOR_YUV2GRAY_420
COLOR_YUV2GRAY_IYUV: COLOR_YUV2GRAY_420
COLOR_YUV2GRAY_I420: COLOR_YUV2GRAY_420
COLOR_YUV420sp2GRAY: COLOR_YUV2GRAY_420
COLOR_YUV420p2GRAY: COLOR_YUV2GRAY_420
COLOR_YUV2RGB_UYVY: 107
COLOR_YUV2BGR_UYVY: 108
COLOR_YUV2RGB_Y422: COLOR_YUV2RGB_UYVY
COLOR_YUV2BGR_Y422: COLOR_YUV2BGR_UYVY
COLOR_YUV2RGB_UYNV: COLOR_YUV2RGB_UYVY
COLOR_YUV2BGR_UYNV: COLOR_YUV2BGR_UYVY
COLOR_YUV2RGBA_UYVY: 111
COLOR_YUV2BGRA_UYVY: 112
COLOR_YUV2RGBA_Y422: COLOR_YUV2RGBA_UYVY
COLOR_YUV2BGRA_Y422: COLOR_YUV2BGRA_UYVY
COLOR_YUV2RGBA_UYNV: COLOR_YUV2RGBA_UYVY
COLOR_YUV2BGRA_UYNV: COLOR_YUV2BGRA_UYVY
COLOR_YUV2RGB_YUY2: 115
COLOR_YUV2BGR_YUY2: 116
COLOR_YUV2RGB_YVYU: 117
COLOR_YUV2BGR_YVYU: 118
COLOR_YUV2RGB_YUYV: COLOR_YUV2RGB_YUY2
COLOR_YUV2BGR_YUYV: COLOR_YUV2BGR_YUY2
COLOR_YUV2RGB_YUNV: COLOR_YUV2RGB_YUY2
COLOR_YUV2BGR_YUNV: COLOR_YUV2BGR_YUY2
COLOR_YUV2RGBA_YUY2: 119
COLOR_YUV2BGRA_YUY2: 120
COLOR_YUV2RGBA_YVYU: 121
COLOR_YUV2BGRA_YVYU: 122
COLOR_YUV2RGBA_YUYV: COLOR_YUV2RGBA_YUY2
COLOR_YUV2BGRA_YUYV: COLOR_YUV2BGRA_YUY2
COLOR_YUV2RGBA_YUNV: COLOR_YUV2RGBA_YUY2
COLOR_YUV2BGRA_YUNV: COLOR_YUV2BGRA_YUY2
COLOR_YUV2GRAY_UYVY: 123
COLOR_YUV2GRAY_YUY2: 124
COLOR_YUV2GRAY_Y422: COLOR_YUV2GRAY_UYVY
COLOR_YUV2GRAY_UYNV: COLOR_YUV2GRAY_UYVY
COLOR_YUV2GRAY_YVYU: COLOR_YUV2GRAY_YUY2
COLOR_YUV2GRAY_YUYV: COLOR_YUV2GRAY_YUY2
COLOR_YUV2GRAY_YUNV: COLOR_YUV2GRAY_YUY2
COLOR_RGBA2mRGBA: 125
COLOR_mRGBA2RGBA: 126
COLOR_RGB2YUV_I420: 127
COLOR_BGR2YUV_I420: 128
COLOR_RGB2YUV_IYUV: COLOR_RGB2YUV_I420
COLOR_BGR2YUV_IYUV: COLOR_BGR2YUV_I420
COLOR_RGBA2YUV_I420: 129
COLOR_BGRA2YUV_I420: 130
COLOR_RGBA2YUV_IYUV: COLOR_RGBA2YUV_I420
COLOR_BGRA2YUV_IYUV: COLOR_BGRA2YUV_I420
COLOR_RGB2YUV_YV12: 131
COLOR_BGR2YUV_YV12: 132
COLOR_RGBA2YUV_YV12: 133
COLOR_BGRA2YUV_YV12: 134
COLOR_BayerBG2BGR: 46
COLOR_BayerGB2BGR: 47
COLOR_BayerRG2BGR: 48
COLOR_BayerGR2BGR: 49
COLOR_BayerRGGB2BGR: COLOR_BayerBG2BGR
COLOR_BayerGRBG2BGR: COLOR_BayerGB2BGR
COLOR_BayerBGGR2BGR: COLOR_BayerRG2BGR
COLOR_BayerGBRG2BGR: COLOR_BayerGR2BGR
COLOR_BayerRGGB2RGB: COLOR_BayerBGGR2BGR
COLOR_BayerGRBG2RGB: COLOR_BayerGBRG2BGR
COLOR_BayerBGGR2RGB: COLOR_BayerRGGB2BGR
COLOR_BayerGBRG2RGB: COLOR_BayerGRBG2BGR
COLOR_BayerBG2RGB: COLOR_BayerRG2BGR
COLOR_BayerGB2RGB: COLOR_BayerGR2BGR
COLOR_BayerRG2RGB: COLOR_BayerBG2BGR
COLOR_BayerGR2RGB: COLOR_BayerGB2BGR
COLOR_BayerBG2GRAY: 86
COLOR_BayerGB2GRAY: 87
COLOR_BayerRG2GRAY: 88
COLOR_BayerGR2GRAY: 89
COLOR_BayerRGGB2GRAY: COLOR_BayerBG2GRAY
COLOR_BayerGRBG2GRAY: COLOR_BayerGB2GRAY
COLOR_BayerBGGR2GRAY: COLOR_BayerRG2GRAY
COLOR_BayerGBRG2GRAY: COLOR_BayerGR2GRAY
COLOR_BayerBG2BGR_VNG: 62
COLOR_BayerGB2BGR_VNG: 63
COLOR_BayerRG2BGR_VNG: 64
COLOR_BayerGR2BGR_VNG: 65
COLOR_BayerRGGB2BGR_VNG: COLOR_BayerBG2BGR_VNG
COLOR_BayerGRBG2BGR_VNG: COLOR_BayerGB2BGR_VNG
COLOR_BayerBGGR2BGR_VNG: COLOR_BayerRG2BGR_VNG
COLOR_BayerGBRG2BGR_VNG: COLOR_BayerGR2BGR_VNG
COLOR_BayerRGGB2RGB_VNG: COLOR_BayerBGGR2BGR_VNG
COLOR_BayerGRBG2RGB_VNG: COLOR_BayerGBRG2BGR_VNG
COLOR_BayerBGGR2RGB_VNG: COLOR_BayerRGGB2BGR_VNG
COLOR_BayerGBRG2RGB_VNG: COLOR_BayerGRBG2BGR_VNG
COLOR_BayerBG2RGB_VNG: COLOR_BayerRG2BGR_VNG
COLOR_BayerGB2RGB_VNG: COLOR_BayerGR2BGR_VNG
COLOR_BayerRG2RGB_VNG: COLOR_BayerBG2BGR_VNG
COLOR_BayerGR2RGB_VNG: COLOR_BayerGB2BGR_VNG
COLOR_BayerBG2BGR_EA: 135
COLOR_BayerGB2BGR_EA: 136
COLOR_BayerRG2BGR_EA: 137
COLOR_BayerGR2BGR_EA: 138
COLOR_BayerRGGB2BGR_EA: COLOR_BayerBG2BGR_EA
COLOR_BayerGRBG2BGR_EA: COLOR_BayerGB2BGR_EA
COLOR_BayerBGGR2BGR_EA: COLOR_BayerRG2BGR_EA
COLOR_BayerGBRG2BGR_EA: COLOR_BayerGR2BGR_EA
COLOR_BayerRGGB2RGB_EA: COLOR_BayerBGGR2BGR_EA
COLOR_BayerGRBG2RGB_EA: COLOR_BayerGBRG2BGR_EA
COLOR_BayerBGGR2RGB_EA: COLOR_BayerRGGB2BGR_EA
COLOR_BayerGBRG2RGB_EA: COLOR_BayerGRBG2BGR_EA
COLOR_BayerBG2RGB_EA: COLOR_BayerRG2BGR_EA
COLOR_BayerGB2RGB_EA: COLOR_BayerGR2BGR_EA
COLOR_BayerRG2RGB_EA: COLOR_BayerBG2BGR_EA
COLOR_BayerGR2RGB_EA: COLOR_BayerGB2BGR_EA
COLOR_BayerBG2BGRA: 139
COLOR_BayerGB2BGRA: 140
COLOR_BayerRG2BGRA: 141
COLOR_BayerGR2BGRA: 142
COLOR_BayerRGGB2BGRA: COLOR_BayerBG2BGRA
COLOR_BayerGRBG2BGRA: COLOR_BayerGB2BGRA
COLOR_BayerBGGR2BGRA: COLOR_BayerRG2BGRA
COLOR_BayerGBRG2BGRA: COLOR_BayerGR2BGRA
COLOR_BayerRGGB2RGBA: COLOR_BayerBGGR2BGRA
COLOR_BayerGRBG2RGBA: COLOR_BayerGBRG2BGRA
COLOR_BayerBGGR2RGBA: COLOR_BayerRGGB2BGRA
COLOR_BayerGBRG2RGBA: COLOR_BayerGRBG2BGRA
COLOR_BayerBG2RGBA: COLOR_BayerRG2BGRA
COLOR_BayerGB2RGBA: COLOR_BayerGR2BGRA
COLOR_BayerRG2RGBA: COLOR_BayerBG2BGRA
COLOR_BayerGR2RGBA: COLOR_BayerGB2BGRA

; VideoCaptureProperties
CAP_PROP_POS_MSEC: 0
CAP_PROP_POS_FRAMES: 1
CAP_PROP_POS_AVI_RATIO: 2
CAP_PROP_FRAME_WIDTH: 3
CAP_PROP_FRAME_HEIGHT: 4
CAP_PROP_FPS: 5
CAP_PROP_FOURCC: 6
CAP_PROP_FRAME_COUNT: 7
CAP_PROP_FORMAT: 8
CAP_PROP_MODE: 9
CAP_PROP_BRIGHTNESS: 10
CAP_PROP_CONTRAST: 11
CAP_PROP_SATURATION: 12
CAP_PROP_HUE: 13
CAP_PROP_GAIN: 14
CAP_PROP_EXPOSURE: 15
CAP_PROP_CONVERT_RGB: 16
CAP_PROP_WHITE_BALANCE_BLUE_U: 17
CAP_PROP_RECTIFICATION: 18
CAP_PROP_MONOCHROME: 19
CAP_PROP_SHARPNESS: 20
CAP_PROP_AUTO_EXPOSURE: 21
CAP_PROP_GAMMA: 22
CAP_PROP_TEMPERATURE: 23
CAP_PROP_TRIGGER: 24
CAP_PROP_TRIGGER_DELAY: 25
CAP_PROP_WHITE_BALANCE_RED_V: 26
CAP_PROP_ZOOM: 27
CAP_PROP_FOCUS: 28
CAP_PROP_GUID: 29
CAP_PROP_ISO_SPEED: 30
CAP_PROP_BACKLIGHT: 32
CAP_PROP_PAN: 33
CAP_PROP_TILT: 34
CAP_PROP_ROLL: 35
CAP_PROP_IRIS: 36
CAP_PROP_SETTINGS: 37
CAP_PROP_BUFFERSIZE: 38
CAP_PROP_AUTOFOCUS: 39
CAP_PROP_SAR_NUM: 40
CAP_PROP_SAR_DEN: 41
CAP_PROP_BACKEND: 42
CAP_PROP_CHANNEL: 43
CAP_PROP_AUTO_WB: 44
CAP_PROP_WB_TEMPERATURE: 45
CAP_PROP_CODEC_PIXEL_FORMAT: 46
CAP_PROP_BITRATE: 47
CAP_PROP_ORIENTATION_META: 48
CAP_PROP_ORIENTATION_AUTO: 49
CAP_PROP_OPEN_TIMEOUT_MSEC: 53
CAP_PROP_READ_TIMEOUT_MSEC: 54

; WindowPropertyFlags
WND_PROP_FULLSCREEN: 0
WND_PROP_AUTOSIZE: 1
WND_PROP_ASPECT_RATIO: 2
WND_PROP_OPENGL: 3
WND_PROP_VISIBLE: 4
WND_PROP_TOPMOST: 5
; WindowFlags
WINDOW_NORMAL: 0
WINDOW_AUTOSIZE: 1  ;0x00000001
WINDOW_OPENGL: 4096 ;0x00001000
WINDOW_FULLSCREEN: 1
WINDOW_FREERATIO: 256 ;0x00000100
WINDOW_KEEPRATIO: 0
WINDOW_GUI_EXPANDED: 0
WINDOW_GUI_NORMAL: 16

; MatProperties
MAT_SIZE: 1
MAT_TYPE: 2
MAT_DEPTH: 3
MAT_CHANNELS: 4
MAT_BINARY: 5
MAT_IMAGE: 6
MAT_VECTOR: 7

; InterpolationFlags
INTER_NEAREST: 0
INTER_LINEAR: 1
INTER_CUBIC: 2
INTER_AREA: 3
INTER_LANCZOS4: 4
INTER_LINEAR_EXACT: 5
INTER_NEAREST_EXACT: 6

; ThresholdTypes
THRESH_BINARY: 0
THRESH_BINARY_INV: 1
THRESH_TRUNC: 2
THRESH_TOZERO: 3
THRESH_TOZERO_INV: 4
THRESH_MASK: 7
THRESH_OTSU: 8
THRESH_TRIANGLE: 16

; Depths:
CV_8U:   0
CV_8S:   1
CV_16U:  2
CV_16S:  3
CV_32S:  4
CV_32F:  5
CV_64F:  6

; DecompTypes:
DECOMP_LU: 0
DECOMP_SVD: 1
DECOMP_EIG: 2
DECOMP_CHOLESKY: 3
DECOMP_QR: 4
DECOMP_NORMAL: 16

; MorphShapes:
MORPH_RECT: 0
MORPH_CROSS: 1
MORPH_ELLIPSE: 2

; MorphTypes:
MORPH_ERODE: 0
MORPH_DILATE: 1
MORPH_OPEN: 2
MORPH_CLOSE: 3
MORPH_GRADIENT: 4
MORPH_TOPHAT: 5
MORPH_BLACKHAT: 6
MORPH_HITMISS: 7

; NormTypes:
NORM_INF: 1
NORM_L1: 2
NORM_L2: 4
NORM_L2SQR: 5
NORM_HAMMING: 6
NORM_HAMMING2: 7
NORM_TYPE_MASK: 7
NORM_RELATIVE: 8
NORM_MINMAX: 32

; ColormapTypes:
COLORMAP_AUTUMN: 0
COLORMAP_BONE: 1
COLORMAP_JET: 2
COLORMAP_WINTER: 3
COLORMAP_RAINBOW: 4
COLORMAP_OCEAN: 5
COLORMAP_SUMMER: 6
COLORMAP_SPRING: 7
COLORMAP_COOL: 8
COLORMAP_HSV: 9
COLORMAP_PINK: 10
COLORMAP_HOT: 11
COLORMAP_PARULA: 12
COLORMAP_MAGMA: 13
COLORMAP_INFERNO: 14
COLORMAP_PLASMA: 15
COLORMAP_VIRIDIS: 16
COLORMAP_CIVIDIS: 17
COLORMAP_TWILIGHT: 18
COLORMAP_TWILIGHT_SHIFTED: 19
COLORMAP_TURBO: 20
COLORMAP_DEEPGREEN: 21

;; MouseEventTypes:
EVENT_MOUSEMOVE:     0
EVENT_LBUTTONDOWN:   1
EVENT_RBUTTONDOWN:   2
EVENT_MBUTTONDOWN:   3
EVENT_LBUTTONUP:     4
EVENT_RBUTTONUP:     5
EVENT_MBUTTONUP:     6
EVENT_LBUTTONDBLCLK: 7
EVENT_RBUTTONDBLCLK: 8
EVENT_MBUTTONDBLCLK: 9
EVENT_MOUSEWHEEL:    10
EVENT_MOUSEHWHEEL:   11