Hi,
I’m trying to reproduce :OpenCV: Camera Calibration using OpenCV.jl.
I made some adjustments but could not figure out how to properly pass the arguments to cv.calibrateCamera. 1st and 2nd arguments I passed were Vector{Array{Float32, 3}}s but those were not detected as Vector{AbstractArray{Float32, 3}}. Also, I need the 4th and 5th arguments that we don’t need in Python version.
Could anyone suggest changes to make it work?
using OpenCV
const cv = OpenCV
## file
filename = "calib_radial.jpg"
img = cv.imread(filename, -1)
gray = cv.cvtColor(img, cv.COLOR_BGR2GRAY)
# termination criteria
criteria = cv.TermCriteria(cv.TERM_CRITERIA_EPS + cv.TERM_CRITERIA_MAX_ITER, 30, 0.001)
# Arrays to store object points and image points from all the images.
objpoints = Vector{Array{Float32, 3}}(undef, 0) # 3d point in real world space
imgpoints = Vector{Array{Float32, 3}}(undef, 0) # 2d points in image plane.
# prepare object points, like (0,0,0), (1,0,0), (2,0,0) ....,(6,5,0)
objp = zeros(Float32, 2, 1, 7 * 6)
n = 1
for i in 1:7, j in 1:6
objp[1, 1, n] = i - 1
objp[2, 1, n] = j - 1
n += 1
end
# Find the chess board corners
isValid, corners = cv.findChessboardCorners(gray, cv.Size{Int32}(7, 6))
# If found, add object points, image points (after refining them)
if isValid
push!(objpoints, objp)
end
corners2 = cv.cornerSubPix(gray, corners, cv.Size{Int32}(11, 11), cv.Size{Int32}(-1, -1), criteria)
push!(imgpoints, corners2)
## camera cal
ret, mtx, dist, rvecs, tvecs = cv.calibrateCamera(objpoints, imgpoints, cv.Size{Int32}(size(gray)[[3, 2]]...))
The error I got.
ERROR: MethodError: no method matching calibrateCamera(::Vector{Array{Float32, 3}}, ::Vector{Array{Float32, 3}}, ::OpenCV.Size{Int32})
Closest candidates are:
calibrateCamera(::Vector{Union{OpenCV.CxxMat, AbstractArray{T, 3} where T<:Union{Float32, Float64, Int16, Int32, Int8, UInt16, UInt8}}}, ::Vector{Union{OpenCV.CxxMat, AbstractArray{T, 3} where T<:Union{Float32, Float64, Int16, Int32, Int8, UInt16, UInt8}}}, ::OpenCV.Size{Int32}, ::Union{OpenCV.CxxMat, AbstractArray{T, 3} where T<:Union{Float32, Float64, Int16, Int32, Int8, UInt16, UInt8}}, ::Union{OpenCV.CxxMat, AbstractArray{T, 3} where T<:Union{Float32, Float64, Int16, Int32, Int8, UInt16, UInt8}}; rvecs, tvecs, flags, criteria)
@ OpenCV C:\Users\---\.julia\artifacts\fb232e63f59cec37f3a904b5decdaa33513a13b1\OpenCV\src\cv_cxx_wrap.jl:1786
calibrateCamera(::Vector{Union{OpenCV.CxxMat, AbstractArray{T, 3} where T<:Union{Float32, Float64, Int16, Int32, Int8, UInt16, UInt8}}}, ::Vector{Union{OpenCV.CxxMat, AbstractArray{T, 3} where T<:Union{Float32, Float64, Int16, Int32, Int8, UInt16, UInt8}}}, ::OpenCV.Size{Int32}, ::Union{OpenCV.CxxMat, AbstractArray{T, 3} where T<:Union{Float32, Float64, Int16, Int32, Int8, UInt16, UInt8}}, ::Union{OpenCV.CxxMat, AbstractArray{T, 3} where T<:Union{Float32, Float64, Int16, Int32, Int8, UInt16, UInt8}}, ::Vector{Union{OpenCV.CxxMat, AbstractArray{T, 3} where T<:Union{Float32, Float64, Int16, Int32, Int8, UInt16, UInt8}}}, ::Vector{Union{OpenCV.CxxMat, AbstractArray{T, 3} where T<:Union{Float32, Float64, Int16, Int32, Int8, UInt16, UInt8}}}, ::Int64, ::OpenCV.TermCriteria)
@ OpenCV C:\Users\---\.julia\artifacts\fb232e63f59cec37f3a904b5decdaa33513a13b1\OpenCV\src\cv_cxx_wrap.jl:1783