float[imgW * imgH * 3] 数据转换成std::vector<cv::Vec3f>

可以使用以下代码将float[imgW * imgH * 3]数据转换成std::vector<cv::Vec3f>：

// imgData为float[imgW * imgH * 3]数据，imgW为图像宽度，imgH为图像高度
std::vector<cv::Vec3f> imgVec;
imgVec.reserve(imgW * imgH);
for (int i = 0; i < imgW * imgH; ++i) {
    float b = imgData[i * 3];
    float g = imgData[i * 3 + 1];
    float r = imgData[i * 3 + 2];
    imgVec.emplace_back(b, g, r);
}

这里利用了cv::Vec3f类型的构造函数，将每个像素点的BGR三个通道值转换成Vec3f类型，最后将其加入到std::vector<cv::Vec3f>中。注意，这里需要使用reserve()方法提前分配好vector的内存，以避免不必要的内存分配和拷贝。

相关问题

FormInfo class FormInfo <<partial>> [ +Formlnfo0- button1 Click(sender:obiect, e:EventArgs) : void+ SetText(run:double, walk:double) : void Form <-- FormInfo Common class Common!+ static) map left lon : double +{static) map top lat : double +{static map right lon : double +{static' map bottom lat : double class Station { +longitute :double <<get>> <<set> >+latitude :double <<get> > <<set>> + staionname :string <<get>> <<set>> + stationlD :int <<get> > <<set>> + address :string <<get>> <<set> > + totalDocks :int <<get> > <<set> > + docksln :int <<get> > < <set> > + status : string <<get> > < <set> > Station-->"screenPoint"Point Form1 class Form1 <<partial>> !-imgH:int- imgW :int isStartSite : bool isEndSite : boolI startIndex :int- endIndex :int - isPlanRoute : bool = false- m distance : double = 0 +Form10 Form1 Shown(sender:obiect,e:EventArgs) : void panelRight SizeChanged(sender:obiect,e:EventArgs): void panelButtom SizeChanged(sender:object, e:EventArgs) : voidForm1 Paint(sender:object, e:PaintEventArgs) : void buttonlmport Click(sender:object, e:EventArgs) : void Import(fileName:string): void GPSToScreen(lon:double.lat:double): PointGetTitude(point:Point): doubel listStations SelectedlndexChanged(sender:obiect, e:EventArgs) : void panel2 Paint(sender:object, e:PaintEventArgs) : voidcheckAll Click(sender:obiect, e:EventArgs) : void comboBox1 SelectedndexChanged(sender:obiect.e:EventAras): voioDrawReqularPoly(x:float, y:float, radius:double, sideCount:int) : PointF panelMouse Paint(sender:obiect,e:PaintEventArgs) : void panelMouse MouseMove(sender:object, e:MouseEventArgs) : voidpanelMouse MouseClick(sender:object, e:MouseEventArgs) : voidbutton1 Click(sender:object, e:EventArgs) : void setRoute0:void - setWalkRoute() : void - comboBox1 TextChanged(sender:object, e:EventArgs) : void class"List1"<T>{ MapHelper class MapHelper!<<const>> EarthRadius : double = 6378.137Istatic' Rad(d:double) : double +Istatic' GetDistance(firstLatitude:double.firstLongitude:double, secondLatitude:doublesecondLongitude:double): double+Istatic1 GetPointDistance(firstPoint:string,secondPoint:string): double Form <-- Form1 Form1-->"allstation<Station>""List1"Form1-->"startPoint"Point Form1-->"endPoint"Point Form1-->"startList<PointFI>""List1" "routeList<PointFIl>""List1Form1-->Form1-->"endList<PointFIl>""List1"Form1-->"m formlnfo"FormInfo画类图

根据提供的信息，可以绘制以下类图：

+-----------------------------------+
|            FormInfo               |
+-----------------------------------+
| +Formlnfo0- button1 Click(...)    |
| +SetText(run:double, walk:double) |
+-----------------------------------+

+-----------------------------+
|            Form             |
+-----------------------------+
| <-- FormInfo                |
+-----------------------------+

+-----------------------------+
|           Common            |
+-----------------------------+
| +{static} map left lon      |
| +{static} map top lat       |
| +{static} map right lon     |
| +{static} map bottom lat    |
+-----------------------------+

+-----------------------------+
|          Station            |
+-----------------------------+
| +longitude : double         |
| +latitude : double          |
| +stationname : string       |
| +stationlD : int            |
| +address : string           |
| +totalDocks : int           |
| +docksln : int              |
| +status : string            |
| --> "screenPoint" Point     |
+-----------------------------+

+-----------------------------+
|          Form1              |
+-----------------------------+
| <-- FormInfo                |
| - imgH: int                 |
| - imgW: int                 |
| - isStartSite: bool         |
| - isEndSite: bool           |
| - startIndex: int           |
| - endIndex: int             |
| - isPlanRoute: bool = false |
| - m distance: double = 0    |
| +Form10                     |
| +Form1 Shown(...)           |
| +panelRight SizeChanged(...)|
| +panelButtom SizeChanged(...)|
| +Form1 Paint(...)           |
| +buttonlmport Click(...)    |
| +Import(fileName:string)    |
| +GPSToScreen(lon:double, lat:double): Point |
| +GetTitude(point:Point): double |
| +listStations SelectedlndexChanged(...) |
| +panel2 Paint(...)          |
| +checkAll Click(...)        |
| +comboBox1 SelectedndexChanged(...) |
| +DrawReqularPoly(...)       |
| +panelMouse Paint(...)      |
| +panelMouse MouseMove(...)  |
| +panelMouse MouseClick(...) |
| +button1 Click(...)         |
| - setRoute0:void            |
| - setWalkRoute() : void     |
| - comboBox1 TextChanged(...)|
+-----------------------------+

+-----------------------------+
|          List1<T>           |
+-----------------------------+

+-----------------------------+
|        MapHelper             |
+-----------------------------+
| <<const>> EarthRadius: double = 6378.137 |
| +static Rad(d: double): double         |
| +static GetDistance(firstLatitude: double, firstLongitude: double, secondLatitude: double, secondLongitude: double): double |
| +static GetPointDistance(firstPoint: string, secondPoint: string): double |
+-----------------------------+

请注意，这只是根据提供的信息绘制的大致类图，可能会有一些缺失或错误。

new float[imgW * imgH * 8]在函数参数里要怎么表达

在函数参数中，可以这样表达：

void function_name(float* img_data, int imgW, int imgH) {
    // Function code
}

// 调用函数时，可以这样传递参数
int imgW = 100;
int imgH = 200;
float* img_data = new float[imgW * imgH * 8];
function_name(img_data, imgW, imgH);

其中，`float* img_data` 表示指向 `float` 类型数据的指针，`int imgW` 和 `int imgH` 表示图片的宽和高。在调用函数时，需要先创建一个大小为 `imgW * imgH * 8` 的 `float` 类型数组，然后将其指针传递给函数。