mod_parallels_xldmod_parallels_xldModParallelsXldModParallelsXldmod_parallels_xld (算子)
名称
mod_parallels_xldmod_parallels_xldModParallelsXldModParallelsXldmod_parallels_xld — 提取包围均匀区域的平行 XLD 多边形。
签名
Herror mod_parallels_xld(const Hobject Parallels, const Hobject Image, Hobject* ModParallels, Hobject* ExtParallels, double Quality, const Hlong MinGray, const Hlong MaxGray, double MaxStandard)
Herror T_mod_parallels_xld(const Hobject Parallels, const Hobject Image, Hobject* ModParallels, Hobject* ExtParallels, const Htuple Quality, const Htuple MinGray, const Htuple MaxGray, const Htuple MaxStandard)
void ModParallelsXld(const HObject& Parallels, const HObject& Image, HObject* ModParallels, HObject* ExtParallels, const HTuple& Quality, const HTuple& MinGray, const HTuple& MaxGray, const HTuple& MaxStandard)
HXLDModPara HXLDPara::ModParallelsXld(const HImage& Image, HXLDExtPara* ExtParallels, const HTuple& Quality, Hlong MinGray, Hlong MaxGray, const HTuple& MaxStandard) const
HXLDModPara HXLDPara::ModParallelsXld(const HImage& Image, HXLDExtPara* ExtParallels, double Quality, Hlong MinGray, Hlong MaxGray, double MaxStandard) const
static void HOperatorSet.ModParallelsXld(HObject parallels, HObject image, out HObject modParallels, out HObject extParallels, HTuple quality, HTuple minGray, HTuple maxGray, HTuple maxStandard)
HXLDModPara HXLDPara.ModParallelsXld(HImage image, out HXLDExtPara extParallels, HTuple quality, int minGray, int maxGray, HTuple maxStandard)
HXLDModPara HXLDPara.ModParallelsXld(HImage image, out HXLDExtPara extParallels, double quality, int minGray, int maxGray, double maxStandard)
描述
mod_parallels_xldmod_parallels_xldModParallelsXldModParallelsXldModParallelsXldmod_parallels_xld selects XLD parallels enclosing
homogeneous areas from the input parallels ParallelsParallelsParallelsParallelsparallelsparallels.
The parameter ImageImageImageImageimageimage contains the corresponding gray value
image.
Only parallels having a quality factor larger than
QualityQualityQualityQualityqualityquality are examined. The algorithm performs parallel
cross sections one pixel apart, and parallel to the line segments in
the area of overlap between two parallel line segments.
In the first iteration, the mean gray value for each of the lines in
the cross section is calculated. In the second iteration, the
standard deviations of the gray values along each line are computed.
If the mean gray value of an area between parallels lies in the
interval [MinGrayMinGrayMinGrayMinGrayminGraymin_gray,MaxGrayMaxGrayMaxGrayMaxGraymaxGraymax_gray], and if the mean of
all standard deviations is smaller than the upper threshold
MaxStandardMaxStandardMaxStandardMaxStandardmaxStandardmax_standard, the corresponding parallels are returned as
modified parallels in ModParallelsModParallelsModParallelsModParallelsmodParallelsmod_parallels。
In a second step, all polygon segments adjacent to parallels
bordering homogeneous areas are checked for homogeneity. To do so,
a rectangle having the width of the last area enclosed by a
modified parallel is constructed, and checked for homogeneity using
the algorithm described above. This process is continued as long as
there are adjacent polygon segments. The polygons thus found are
returned as extended parallels in ExtParallelsExtParallelsExtParallelsExtParallelsextParallelsext_parallels。
执行信息
- 多线程类型：可重入（与非独占算子并行运行）。
- 多线程作用域：全局（可从任何线程调用）。
- 未采用并行化处理。
参数
ParallelsParallelsParallelsParallelsparallelsparallels (输入对象) xld_para-array → objectHXLDParaHObjectHXLDParaHobject
Input XLD parallels.
ImageImageImageImageimageimage (输入对象) singlechannelimage → objectHImageHObjectHImageHobject (byte)
Corresponding gray value image.
ModParallelsModParallelsModParallelsModParallelsmodParallelsmod_parallels (输出对象) xld_mod_para-array → objectHXLDModParaHObjectHXLDModParaHobject *
Modified XLD parallels.
ExtParallelsExtParallelsExtParallelsExtParallelsextParallelsext_parallels (输出对象) xld_ext_para-array → objectHXLDExtParaHObjectHXLDExtParaHobject *
Extended XLD parallels.
QualityQualityQualityQualityqualityquality (输入控制) number → HTupleUnion[float, int]HTupleHtuple (real / integer) (double / int / long) (double / Hlong) (double / Hlong)
Minimum quality factor (measure of parallelism).
默认值：
0.4
建议值：
0.1, 0.2, 0.3, 0.4, 0.5, 0.6
限制：
0.0 <= Quality && Quality <= 1.0
MinGrayMinGrayMinGrayMinGrayminGraymin_gray (输入控制) integer → HTupleintHTupleHtuple (integer) (int / long) (Hlong) (Hlong)
Minimum mean gray value.
默认值：
160
建议值：
80, 100, 120, 140, 160, 180
限制：
0 <= MinGray && MinGray <= 255
MaxGrayMaxGrayMaxGrayMaxGraymaxGraymax_gray (输入控制) integer → HTupleintHTupleHtuple (integer) (int / long) (Hlong) (Hlong)
Maximum mean gray value.
默认值：
220
建议值：
140, 160, 180, 200, 220, 240
限制：
0 <= MaxGray && MaxGray <= 255 && MaxGray >= MinGray
MaxStandardMaxStandardMaxStandardMaxStandardmaxStandardmax_standard (输入控制) number → HTupleUnion[float, int]HTupleHtuple (real / integer) (double / int / long) (double / Hlong) (double / Hlong)
Maximum allowed standard deviation.
默认值：
10.0
建议值：
5.0, 10.0, 15.0, 20.0
限制：
MaxStandard >= 0.0
可能的前趋
gen_parallels_xldgen_parallels_xldGenParallelsXldGenParallelsXldGenParallelsXldgen_parallels_xld
可能的后继
max_parallels_xldmax_parallels_xldMaxParallelsXldMaxParallelsXldMaxParallelsXldmax_parallels_xld
另见
info_parallels_xldinfo_parallels_xldInfoParallelsXldInfoParallelsXldInfoParallelsXldinfo_parallels_xld
模块
基础