View Source Evision.Barcode.BarcodeDetector (Evision v0.1.34)
Summary
Functions
Initialize the BarcodeDetector.
Initialize the BarcodeDetector.
Decodes graphical code in image once it's found by the detect() method.
Decodes graphical code in image once it's found by the detect() method.
Decodes graphical codes in image once it's found by the detect() method.
Decodes graphical codes in image once it's found by the detect() method.
Decodes barcode in image once it's found by the detect() method.
Detects graphical code in image and returns the quadrangle containing the code.
Detects graphical code in image and returns the quadrangle containing the code.
Both detects and decodes graphical code
Both detects and decodes graphical code
Both detects and decodes graphical codes
Both detects and decodes graphical codes
Both detects and decodes barcode
Both detects and decodes barcode
Detects graphical codes in image and returns the vector of the quadrangles containing the codes.
Detects graphical codes in image and returns the vector of the quadrangles containing the codes.
Types
@type t() :: %Evision.Barcode.BarcodeDetector{ref: reference()}
Type that represents an Barcode.BarcodeDetector
struct.
ref.
reference()
The underlying erlang resource variable.
Functions
Initialize the BarcodeDetector.
Return
- self:
BarcodeDetector
Python prototype (for reference only):
BarcodeDetector() -> <barcode_BarcodeDetector object>
Initialize the BarcodeDetector.
Positional Arguments
prototxt_path:
string
.prototxt file path for the super resolution model
model_path:
string
.model file path for the super resolution model
Return
- self:
BarcodeDetector
Parameters allow to load optional Super Resolution DNN model for better quality.
Python prototype (for reference only):
BarcodeDetector(prototxt_path, model_path) -> <barcode_BarcodeDetector object>
@spec decode(t(), Evision.Mat.maybe_mat_in(), Evision.Mat.maybe_mat_in()) :: {binary(), Evision.Mat.t()} | {:error, String.t()}
Decodes graphical code in image once it's found by the detect() method.
Positional Arguments
self:
Evision.Barcode.BarcodeDetector.t()
img:
Evision.Mat.t()
.grayscale or color (BGR) image containing graphical code.
points:
Evision.Mat.t()
.Quadrangle vertices found by detect() method (or some other algorithm).
Return
retval:
string
straight_code:
Evision.Mat.t()
.The optional output image containing binarized code, will be empty if not found.
Returns UTF8-encoded output string or empty string if the code cannot be decoded.
Python prototype (for reference only):
decode(img, points[, straight_code]) -> retval, straight_code
@spec decode( t(), Evision.Mat.maybe_mat_in(), Evision.Mat.maybe_mat_in(), [{atom(), term()}, ...] | nil ) :: {binary(), Evision.Mat.t()} | {:error, String.t()}
Decodes graphical code in image once it's found by the detect() method.
Positional Arguments
self:
Evision.Barcode.BarcodeDetector.t()
img:
Evision.Mat.t()
.grayscale or color (BGR) image containing graphical code.
points:
Evision.Mat.t()
.Quadrangle vertices found by detect() method (or some other algorithm).
Return
retval:
string
straight_code:
Evision.Mat.t()
.The optional output image containing binarized code, will be empty if not found.
Returns UTF8-encoded output string or empty string if the code cannot be decoded.
Python prototype (for reference only):
decode(img, points[, straight_code]) -> retval, straight_code
@spec decodeMulti(t(), Evision.Mat.maybe_mat_in(), Evision.Mat.maybe_mat_in()) :: {[binary()], [Evision.Mat.t()]} | false | {:error, String.t()}
Decodes graphical codes in image once it's found by the detect() method.
Positional Arguments
self:
Evision.Barcode.BarcodeDetector.t()
img:
Evision.Mat.t()
.grayscale or color (BGR) image containing graphical codes.
points:
Evision.Mat.t()
.vector of Quadrangle vertices found by detect() method (or some other algorithm).
Return
retval:
bool
decoded_info:
[string]
.UTF8-encoded output vector of string or empty vector of string if the codes cannot be decoded.
straight_code:
[Evision.Mat]
.The optional output vector of images containing binarized codes
Python prototype (for reference only):
decodeMulti(img, points[, straight_code]) -> retval, decoded_info, straight_code
@spec decodeMulti( t(), Evision.Mat.maybe_mat_in(), Evision.Mat.maybe_mat_in(), [{atom(), term()}, ...] | nil ) :: {[binary()], [Evision.Mat.t()]} | false | {:error, String.t()}
Decodes graphical codes in image once it's found by the detect() method.
Positional Arguments
self:
Evision.Barcode.BarcodeDetector.t()
img:
Evision.Mat.t()
.grayscale or color (BGR) image containing graphical codes.
points:
Evision.Mat.t()
.vector of Quadrangle vertices found by detect() method (or some other algorithm).
Return
retval:
bool
decoded_info:
[string]
.UTF8-encoded output vector of string or empty vector of string if the codes cannot be decoded.
straight_code:
[Evision.Mat]
.The optional output vector of images containing binarized codes
Python prototype (for reference only):
decodeMulti(img, points[, straight_code]) -> retval, decoded_info, straight_code
@spec decodeWithType(t(), Evision.Mat.maybe_mat_in(), Evision.Mat.maybe_mat_in()) :: {[binary()], [binary()]} | false | {:error, String.t()}
Decodes barcode in image once it's found by the detect() method.
Positional Arguments
self:
Evision.Barcode.BarcodeDetector.t()
img:
Evision.Mat.t()
.grayscale or color (BGR) image containing bar code.
points:
Evision.Mat.t()
.vector of rotated rectangle vertices found by detect() method (or some other algorithm). For N detected barcodes, the dimensions of this array should be [N][4]. Order of four points in vector<Point2f> is bottomLeft, topLeft, topRight, bottomRight.
Return
retval:
bool
decoded_info:
[string]
.UTF8-encoded output vector of string or empty vector of string if the codes cannot be decoded.
decoded_type:
[string]
.vector strings, specifies the type of these barcodes
@return true if at least one valid barcode have been found
Python prototype (for reference only):
decodeWithType(img, points) -> retval, decoded_info, decoded_type
@spec detect(t(), Evision.Mat.maybe_mat_in()) :: Evision.Mat.t() | false | {:error, String.t()}
Detects graphical code in image and returns the quadrangle containing the code.
Positional Arguments
self:
Evision.Barcode.BarcodeDetector.t()
img:
Evision.Mat.t()
.grayscale or color (BGR) image containing (or not) graphical code.
Return
retval:
bool
points:
Evision.Mat.t()
.Output vector of vertices of the minimum-area quadrangle containing the code.
Python prototype (for reference only):
detect(img[, points]) -> retval, points
@spec detect(t(), Evision.Mat.maybe_mat_in(), [{atom(), term()}, ...] | nil) :: Evision.Mat.t() | false | {:error, String.t()}
Detects graphical code in image and returns the quadrangle containing the code.
Positional Arguments
self:
Evision.Barcode.BarcodeDetector.t()
img:
Evision.Mat.t()
.grayscale or color (BGR) image containing (or not) graphical code.
Return
retval:
bool
points:
Evision.Mat.t()
.Output vector of vertices of the minimum-area quadrangle containing the code.
Python prototype (for reference only):
detect(img[, points]) -> retval, points
@spec detectAndDecode(t(), Evision.Mat.maybe_mat_in()) :: {binary(), Evision.Mat.t(), Evision.Mat.t()} | {:error, String.t()}
Both detects and decodes graphical code
Positional Arguments
self:
Evision.Barcode.BarcodeDetector.t()
img:
Evision.Mat.t()
.grayscale or color (BGR) image containing graphical code.
Return
retval:
string
points:
Evision.Mat.t()
.optional output array of vertices of the found graphical code quadrangle, will be empty if not found.
straight_code:
Evision.Mat.t()
.The optional output image containing binarized code
Python prototype (for reference only):
detectAndDecode(img[, points[, straight_code]]) -> retval, points, straight_code
@spec detectAndDecode(t(), Evision.Mat.maybe_mat_in(), [{atom(), term()}, ...] | nil) :: {binary(), Evision.Mat.t(), Evision.Mat.t()} | {:error, String.t()}
Both detects and decodes graphical code
Positional Arguments
self:
Evision.Barcode.BarcodeDetector.t()
img:
Evision.Mat.t()
.grayscale or color (BGR) image containing graphical code.
Return
retval:
string
points:
Evision.Mat.t()
.optional output array of vertices of the found graphical code quadrangle, will be empty if not found.
straight_code:
Evision.Mat.t()
.The optional output image containing binarized code
Python prototype (for reference only):
detectAndDecode(img[, points[, straight_code]]) -> retval, points, straight_code
@spec detectAndDecodeMulti(t(), Evision.Mat.maybe_mat_in()) :: {[binary()], Evision.Mat.t(), [Evision.Mat.t()]} | false | {:error, String.t()}
Both detects and decodes graphical codes
Positional Arguments
self:
Evision.Barcode.BarcodeDetector.t()
img:
Evision.Mat.t()
.grayscale or color (BGR) image containing graphical codes.
Return
retval:
bool
decoded_info:
[string]
.UTF8-encoded output vector of string or empty vector of string if the codes cannot be decoded.
points:
Evision.Mat.t()
.optional output vector of vertices of the found graphical code quadrangles. Will be empty if not found.
straight_code:
[Evision.Mat]
.The optional vector of images containing binarized codes
Python prototype (for reference only):
detectAndDecodeMulti(img[, points[, straight_code]]) -> retval, decoded_info, points, straight_code
@spec detectAndDecodeMulti( t(), Evision.Mat.maybe_mat_in(), [{atom(), term()}, ...] | nil ) :: {[binary()], Evision.Mat.t(), [Evision.Mat.t()]} | false | {:error, String.t()}
Both detects and decodes graphical codes
Positional Arguments
self:
Evision.Barcode.BarcodeDetector.t()
img:
Evision.Mat.t()
.grayscale or color (BGR) image containing graphical codes.
Return
retval:
bool
decoded_info:
[string]
.UTF8-encoded output vector of string or empty vector of string if the codes cannot be decoded.
points:
Evision.Mat.t()
.optional output vector of vertices of the found graphical code quadrangles. Will be empty if not found.
straight_code:
[Evision.Mat]
.The optional vector of images containing binarized codes
Python prototype (for reference only):
detectAndDecodeMulti(img[, points[, straight_code]]) -> retval, decoded_info, points, straight_code
@spec detectAndDecodeWithType(t(), Evision.Mat.maybe_mat_in()) :: {[binary()], [binary()], Evision.Mat.t()} | false | {:error, String.t()}
Both detects and decodes barcode
Positional Arguments
self:
Evision.Barcode.BarcodeDetector.t()
img:
Evision.Mat.t()
.grayscale or color (BGR) image containing barcode.
Return
retval:
bool
decoded_info:
[string]
.UTF8-encoded output vector of string(s) or empty vector of string if the codes cannot be decoded.
decoded_type:
[string]
.vector of strings, specifies the type of these barcodes
points:
Evision.Mat.t()
.optional output vector of vertices of the found barcode rectangle. Will be empty if not found.
@return true if at least one valid barcode have been found
Python prototype (for reference only):
detectAndDecodeWithType(img[, points]) -> retval, decoded_info, decoded_type, points
@spec detectAndDecodeWithType( t(), Evision.Mat.maybe_mat_in(), [{atom(), term()}, ...] | nil ) :: {[binary()], [binary()], Evision.Mat.t()} | false | {:error, String.t()}
Both detects and decodes barcode
Positional Arguments
self:
Evision.Barcode.BarcodeDetector.t()
img:
Evision.Mat.t()
.grayscale or color (BGR) image containing barcode.
Return
retval:
bool
decoded_info:
[string]
.UTF8-encoded output vector of string(s) or empty vector of string if the codes cannot be decoded.
decoded_type:
[string]
.vector of strings, specifies the type of these barcodes
points:
Evision.Mat.t()
.optional output vector of vertices of the found barcode rectangle. Will be empty if not found.
@return true if at least one valid barcode have been found
Python prototype (for reference only):
detectAndDecodeWithType(img[, points]) -> retval, decoded_info, decoded_type, points
@spec detectMulti(t(), Evision.Mat.maybe_mat_in()) :: Evision.Mat.t() | false | {:error, String.t()}
Detects graphical codes in image and returns the vector of the quadrangles containing the codes.
Positional Arguments
self:
Evision.Barcode.BarcodeDetector.t()
img:
Evision.Mat.t()
.grayscale or color (BGR) image containing (or not) graphical codes.
Return
retval:
bool
points:
Evision.Mat.t()
.Output vector of vector of vertices of the minimum-area quadrangle containing the codes.
Python prototype (for reference only):
detectMulti(img[, points]) -> retval, points
@spec detectMulti(t(), Evision.Mat.maybe_mat_in(), [{atom(), term()}, ...] | nil) :: Evision.Mat.t() | false | {:error, String.t()}
Detects graphical codes in image and returns the vector of the quadrangles containing the codes.
Positional Arguments
self:
Evision.Barcode.BarcodeDetector.t()
img:
Evision.Mat.t()
.grayscale or color (BGR) image containing (or not) graphical codes.
Return
retval:
bool
points:
Evision.Mat.t()
.Output vector of vector of vertices of the minimum-area quadrangle containing the codes.
Python prototype (for reference only):
detectMulti(img[, points]) -> retval, points