非極大値の抑制(Canny 法によるエッジ検出で利用)
Namespace: fvalgcliAssembly: fvalgcli (in fvalgcli.dll) Version: 3.1.0.0 (3.1.0.11)
Syntax
C# |
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public static int fnFIE_nms_canny( FHANDLE hMagX, FHANDLE hMagY, FHANDLE hMag, double dTLow, double dTHigh, ref ushort ushpTLow, ref ushort ushpTHigh ) |
Visual Basic |
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Public Shared Function fnFIE_nms_canny ( hMagX As FHANDLE, hMagY As FHANDLE, hMag As FHANDLE, dTLow As Double, dTHigh As Double, ByRef ushpTLow As UShort, ByRef ushpTHigh As UShort ) As Integer |
Parameters
- hMagX
- Type: fvalgcli..::..FHANDLE
X方向のエッジ勾配強度画像 ( type: s16 )
- hMagY
- Type: fvalgcli..::..FHANDLE
Y方向のエッジ勾配強度画像 ( type: s16 )
- hMag
- Type: fvalgcli..::..FHANDLE
エッジ勾配強度画像 (type: us16)
- dTLow
- Type: System..::..Double
ピクセル数の下限方向の割合を決定するための閾値
- dTHigh
- Type: System..::..Double
ピクセル数の上限方向の割合を決定するための閾値- 0 < dTLow < 1.0 && 0 < dTHigh < 1.0
- dTLow < dTHigh or dTLow == dTHigh == 0.0
- ushpTLow
- Type: System..::..UInt16%
dTLow から得られた下限閾値
- ushpTHigh
- Type: System..::..UInt16%
dTHigh から得られた上限閾値
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 | |
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F_ERR_NONE | 正常終了 | |
F_ERR_INVALID_PARAM | 不正なパラメータが渡された | ( dTHigh ≦ dTLow && ( dTHigh != 0.0 && dTLow != 0.0 ) ) or ( dTHigh ≧ 1 || dTLow ≧ 1 || dTHigh < 0 || dTLow < 0 ) |
F_ERR_INVALID_IMAGE | 不正な画像が渡された | 各画像のサイズが違う(縦横サイズ、チャネル数) 不正な画像が渡された 画像横縦サイズはいずれが3以下 画像のチャンネル数は1以上 |
F_ERR_NOMEMORY | バッファーメモリ配分失敗 | 画像オブジェクトの異常 |
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 |
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// $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_canny() { 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); 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_US16, 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); double dTLow = 0.2; double dTHigh = 0.5; ushort ushpTLow = 0; ushort ushpTHigh = 0; int status = api.fnFIE_nms_canny(hMagX, hMagY, hThin, dTLow, dTHigh, ref ushpTLow, ref ushpTHigh); Assert.IsTrue(status == (int)fvalgcli.f_err.F_ERR_NONE, "fnFIE_nms_canny: エラーが発生しました。({0})", (fvalgcli.f_err)status); Console.WriteLine("fnFIE_nms_canny"); Console.WriteLine("ushpTLow={0}", ushpTLow); Console.WriteLine("ushpTHigh={0}", ushpTHigh); } finally { hSrc.Dispose(); hMagX.Dispose(); hMagY.Dispose(); hThin.Dispose(); } } } } |
Visual Basic | Copy |
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' $Revision: 1.1 $ Imports System.Collections.Generic Imports System.Text Imports fvalgcli Public Partial Class FIE <FvPluginExecute> _ Public Sub fnFIE_nms_canny() 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) 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_US16), 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 dTLow As Double = 0.2 Dim dTHigh As Double = 0.5 Dim ushpTLow As UShort = 0 Dim ushpTHigh As UShort = 0 Dim status As Integer = api.fnFIE_nms_canny(hMagX, hMagY, hThin, dTLow, dTHigh, ushpTLow, _ ushpTHigh) Assert.IsTrue(status = CInt(fvalgcli.f_err.F_ERR_NONE), "fnFIE_nms_canny: エラーが発生しました。({0})", CType(status, fvalgcli.f_err)) Console.WriteLine("fnFIE_nms_canny") Console.WriteLine("ushpTLow={0}", ushpTLow) Console.WriteLine("ushpTHigh={0}", ushpTHigh) Finally hSrc.Dispose() hMagX.Dispose() hMagY.Dispose() hThin.Dispose() End Try End Sub End Class |