/// <summary>
///
/// </summary>
public override void AssignResult()
{
if (!IsReady())
{
throw new NotSupportedException();
}
// Matで結果取得
using (var vectorOfMat = new VectorOfMat())
{
NativeMethods.HandleException(
NativeMethods.core_OutputArray_getVectorOfMat(ptr, vectorOfMat.CvPtr));
GC.KeepAlive(this);
list.Clear();
list.AddRange(vectorOfMat.ToArray());
}
}
/// <summary>
/// Saves an image to a specified file.
/// </summary>
/// <param name="fileName">Name of the file.</param>
/// <param name="img">Image to be saved.</param>
/// <param name="prms">Format-specific save parameters encoded as pairs</param>
/// <returns></returns>
public static bool ImWrite(string fileName, IEnumerable <Mat> img, int[]?prms = null)
{
if (string.IsNullOrEmpty(fileName))
{
throw new ArgumentNullException(nameof(fileName));
}
if (img == null)
{
throw new ArgumentNullException(nameof(img));
}
prms ??= Array.Empty <int>();
using var imgVec = new VectorOfMat(img);
NativeMethods.HandleException(
NativeMethods.imgcodecs_imwrite_multi(fileName, imgVec.CvPtr, prms, prms.Length, out var ret));
GC.KeepAlive(img);
return(ret != 0);
}
/// <summary>
/// Decodes QR codes in image once it's found by the detect() method.
/// Returns UTF8-encoded output string or empty string if the code cannot be decoded.
/// </summary>
/// <param name="img">grayscale or color (BGR) image containing QR code.</param>
/// <param name="points">Quadrangle vertices found by detect() method (or some other algorithm).</param>
/// <param name="decodedInfo">UTF8-encoded output vector of string or empty vector of string if the codes cannot be decoded. </param>
/// <param name="straightQrCode">The optional output image containing rectified and binarized QR code</param>
/// <param name="isOutputStraightQrCode"><see langword="true"/> to output <paramref name="straightQrCode"/></param>
/// <returns></returns>
protected bool DecodeMulti(InputArray img, IEnumerable <Point2f> points, out string?[] decodedInfo, out Mat[] straightQrCode, bool isOutputStraightQrCode)
{
if (img == null)
{
throw new ArgumentNullException(nameof(img));
}
if (points == null)
{
throw new ArgumentNullException(nameof(points));
}
img.ThrowIfDisposed();
using var decodedInfoVec = new VectorOfString();
using var pointsVec = new VectorOfPoint2f(points);
int ret;
if (isOutputStraightQrCode)
{
NativeMethods.HandleException(
NativeMethods.objdetect_QRCodeDetector_decodeMulti(
ptr, img.CvPtr, pointsVec.CvPtr, decodedInfoVec.CvPtr, out var straightQrCodePtr, out ret));
using var straightQrCodeVec = new VectorOfMat(straightQrCodePtr);
straightQrCode = straightQrCodeVec.ToArray();
}
else
{
NativeMethods.HandleException(
NativeMethods.objdetect_QRCodeDetector_decodeMulti_NoStraightQrCode(
ptr, img.CvPtr, pointsVec.CvPtr, decodedInfoVec.CvPtr, out ret));
straightQrCode = Array.Empty <Mat>();
}
// decode utf-8 bytes.
decodedInfo = decodedInfoVec.ToArray();
GC.KeepAlive(img);
GC.KeepAlive(points);
GC.KeepAlive(this);
return(ret != 0);
}
/// <summary>
/// Both detects and decodes QR code.
/// To simplify the usage, there is a only API: detectAndDecode
/// </summary>
/// <param name="inputImage">supports grayscale or color(BGR) image.</param>
/// <param name="bbox">optional output array of vertices of the found QR code quadrangle.Will be empty if not found.</param>
/// <param name="results">list of decoded string.</param>
public void DetectAndDecode(InputArray inputImage, out Mat[] bbox, out string[] results)
{
if (inputImage == null)
{
throw new ArgumentNullException(nameof(inputImage));
}
inputImage.ThrowIfDisposed();
using var bboxVec = new VectorOfMat();
using var texts = new VectorOfString();
NativeMethods.HandleException(
NativeMethods.wechat_qrcode_WeChatQRCode_detectAndDecode(
ptr, inputImage.CvPtr, bboxVec.CvPtr, texts.CvPtr));
bbox = bboxVec.ToArray();
results = texts.ToArray();
GC.KeepAlive(this);
GC.KeepAlive(inputImage);
}
/// <summary>
/// Saves an image to a specified file.
/// </summary>
/// <param name="fileName">Name of the file.</param>
/// <param name="img">Image to be saved.</param>
/// <param name="prms">Format-specific save parameters encoded as pairs</param>
/// <returns></returns>
public static bool ImWrite(string fileName, IEnumerable <Mat> img, int[]?prms = null)
{
if (string.IsNullOrEmpty(fileName))
{
throw new ArgumentNullException(nameof(fileName));
}
if (img == null)
{
throw new ArgumentNullException(nameof(img));
}
if (prms == null)
{
prms = new int[0];
}
using (var imgVec = new VectorOfMat(img))
{
var res = NativeMethods.imgcodecs_imwrite_multi(fileName, imgVec.CvPtr, prms, prms.Length) != 0;
GC.KeepAlive(img);
return(res);
}
}
/// <summary>
/// Constructs a pyramid which can be used as input for calcOpticalFlowPyrLK
/// </summary>
/// <param name="img">8-bit input image.</param>
/// <param name="pyramid">output pyramid.</param>
/// <param name="winSize">window size of optical flow algorithm.
/// Must be not less than winSize argument of calcOpticalFlowPyrLK().
/// It is needed to calculate required padding for pyramid levels.</param>
/// <param name="maxLevel">0-based maximal pyramid level number.</param>
/// <param name="withDerivatives">set to precompute gradients for the every pyramid level.
/// If pyramid is constructed without the gradients then calcOpticalFlowPyrLK() will
/// calculate them internally.</param>
/// <param name="pyrBorder">the border mode for pyramid layers.</param>
/// <param name="derivBorder">the border mode for gradients.</param>
/// <param name="tryReuseInputImage">put ROI of input image into the pyramid if possible.
/// You can pass false to force data copying.</param>
/// <returns>number of levels in constructed pyramid. Can be less than maxLevel.</returns>
public static int BuildOpticalFlowPyramid(
InputArray img, out Mat[] pyramid,
Size winSize, int maxLevel,
bool withDerivatives = true,
BorderTypes pyrBorder = BorderTypes.Reflect101,
BorderTypes derivBorder = BorderTypes.Constant,
bool tryReuseInputImage = true)
{
if (img == null)
{
throw new ArgumentNullException(nameof(img));
}
img.ThrowIfDisposed();
using var pyramidVec = new VectorOfMat();
NativeMethods.HandleException(
NativeMethods.video_buildOpticalFlowPyramid2(
img.CvPtr, pyramidVec.CvPtr, winSize, maxLevel, withDerivatives ? 1 : 0,
(int)pyrBorder, (int)derivBorder, tryReuseInputImage ? 1 : 0, out var ret));
GC.KeepAlive(img);
pyramid = pyramidVec.ToArray();
return(ret);
}
