非極大値の抑制（エッジ勾配方向を利用）

Namespace: fvalgcli
Assembly: fvalgcli (in fvalgcli.dll) Version: 3.1.0.0 (3.1.0.11)

Syntax

C#
public static int fnFIE_nms_dir(
	FHANDLE hmagx,
	FHANDLE hmagy,
	FHANDLE hthin,
	double thresh
)
Visual Basic
Public Shared Function fnFIE_nms_dir ( 
	hmagx As FHANDLE,
	hmagy As FHANDLE,
	hthin As FHANDLE,
	thresh As Double
) As Integer

Parameters

hmagx
Type: fvalgcli..::..FHANDLE
X方向のエッジ強度画像(type:s16, double)
hmagy
Type: fvalgcli..::..FHANDLE
Y方向のエッジ強度画像(type:s16, double)
hthin
Type: fvalgcli..::..FHANDLE
細線化画像(type:uc8)
thresh
Type: System..::..Double
非常に小さい勾配を取り除くための閾値

Return Value

Type: Int32
以下のエラーコードを返します。

エラーコード：
f_err内容
F_ERR_NONE正常終了
F_ERR_INVALID_IMAGE不正な画像が渡された
F_ERR_INVALID_PARAM不正なパラメータが渡された
  • thresh が０未満
F_ERR_NOMEMORYメモリ不足エラー
F_ERR_NO_LICENCEライセンスエラー、または未初期化エラー

Examples

C# Copy imageCopy
//    $Revision: 1.1 $

using System;
using System.Collections.Generic;
using System.Text;
using fvalgcli;

namespace TC
{
    public partial class FIE
    {
        [FvPluginExecute]
        public void fnFIE_nms_dir()
        {
            string filepath = TestImageDir + "/TC/SampleCode/floppy_UC8.jpg";

            FHANDLE hSrc = FHANDLE.Zero;
            FHANDLE hMagX = FHANDLE.Zero;
            FHANDLE hMagY = FHANDLE.Zero;
            FHANDLE hThin = FHANDLE.Zero;

            try
            {
                api.fnFIE_load_jpeg(filepath, ref hSrc, f_color_img_type.F_COLOR_IMG_TYPE_UC8);

                double thresh = 64.0;
                hMagX = api.fnFIE_img_root_alloc((int)f_imgtype.F_IMG_S16, 1, api.fnFIE_img_get_width(hSrc), api.fnFIE_img_get_height(hSrc));
                hMagY = api.fnFIE_img_root_alloc((int)f_imgtype.F_IMG_S16, 1, api.fnFIE_img_get_width(hSrc), api.fnFIE_img_get_height(hSrc));
                hThin = api.fnFIE_img_root_alloc((int)f_imgtype.F_IMG_UC8, 1, api.fnFIE_img_get_width(hSrc), api.fnFIE_img_get_height(hSrc));

                api.fnFIE_sobel(hSrc, hMagX, f_sobel_mode.F_SOBEL_X_MODE, f_border_mode.F_BORDER_NONE, 0.0);
                api.fnFIE_sobel(hSrc, hMagY, f_sobel_mode.F_SOBEL_Y_MODE, f_border_mode.F_BORDER_NONE, 0.0);

                int status = api.fnFIE_nms_dir(hMagX, hMagY, hThin, thresh);
                Assert.IsTrue(status == (int)f_err.F_ERR_NONE, "fnFIE_nms_dir: エラーが発生しました。({0})", (f_err)status);
                Console.WriteLine("fnFIE_nms_dir");
            }
            finally
            {
                hSrc.Dispose();
                hMagX.Dispose();
                hMagY.Dispose();
                hThin.Dispose();
            }
        }
    }
}

Visual Basic Copy imageCopy
'    $Revision: 1.1 $

Imports System.Collections.Generic
Imports System.Text
Imports fvalgcli

Public Partial Class FIE
    <FvPluginExecute> _
    Public Sub fnFIE_nms_dir()
        Dim filepath As String = TestImageDir & "/TC/SampleCode/floppy_UC8.jpg"

        Dim hSrc As FHANDLE = FHANDLE.Zero
        Dim hMagX As FHANDLE = FHANDLE.Zero
        Dim hMagY As FHANDLE = FHANDLE.Zero
        Dim hThin As FHANDLE = FHANDLE.Zero

        Try
            api.fnFIE_load_jpeg(filepath, hSrc, f_color_img_type.F_COLOR_IMG_TYPE_UC8)

            Dim thresh As Double = 64.0
            hMagX = api.fnFIE_img_root_alloc(CInt(f_imgtype.F_IMG_S16), 1, api.fnFIE_img_get_width(hSrc), api.fnFIE_img_get_height(hSrc))
            hMagY = api.fnFIE_img_root_alloc(CInt(f_imgtype.F_IMG_S16), 1, api.fnFIE_img_get_width(hSrc), api.fnFIE_img_get_height(hSrc))
            hThin = api.fnFIE_img_root_alloc(CInt(f_imgtype.F_IMG_UC8), 1, api.fnFIE_img_get_width(hSrc), api.fnFIE_img_get_height(hSrc))

            api.fnFIE_sobel(hSrc, hMagX, f_sobel_mode.F_SOBEL_X_MODE, f_border_mode.F_BORDER_NONE, 0.0)
            api.fnFIE_sobel(hSrc, hMagY, f_sobel_mode.F_SOBEL_Y_MODE, f_border_mode.F_BORDER_NONE, 0.0)

            Dim status As Integer = api.fnFIE_nms_dir(hMagX, hMagY, hThin, thresh)
            Assert.IsTrue(status = CInt(f_err.F_ERR_NONE), "fnFIE_nms_dir: エラーが発生しました。({0})", CType(status, f_err))
            Console.WriteLine("fnFIE_nms_dir")
        Finally
            hSrc.Dispose()
            hMagX.Dispose()
            hMagY.Dispose()
            hThin.Dispose()
        End Try
    End Sub
End Class

See Also