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2026-06-18

获取密集矩形 - GetDenseRect ​

函数简介 ​

查找二值化图片中像素最密集的区域，可以配合找色块等功能做二次分析。

接口名称 ​

GetDenseRect

DLL调用 ​

c
int GetDenseRect(long instance, long image, int width, int height, int* x1, int* y1, int* x2, int* y2);

参数说明 ​

参数名类型说明
instance长整数型OLAPlug对象的指针，由 CreateCOLAPlugInterFace 接口生成。
image长整数型图像句柄。
width整数型矩形宽度。
height整数型矩形高度。
x1整数型指针返回左上角x坐标。
y1整数型指针返回左上角y坐标。
x2整数型指针返回右下角x坐标。
y2整数型指针返回右下角y坐标。

示例 ​

SDK 调用 ​

cpp
#include "OLAPlugServer.h"

OLAPlugServer ola;
long image = ola.LoadImage("maps/path_map.png");
if (image != 0) {
    int x1, y1, x2, y2;
    int ret = ola.GetDenseRect(image, 800, 600, x1, y1, x2, y2);
    ola.FreeImage(image);
}
csharp
using OLAPlug;

var ola = new OLAPlugServer();
long image = ola.LoadImage("maps/path_map.png");
if (image != 0)
{
    int ret = ola.GetDenseRect(image, 800, 600, out int x1, out int y1, out int x2, out int y2);
    ola.FreeImage(image);
}
python
from OLAPlugServer import OLAPlugServer

ola = OLAPlugServer()
image = ola.LoadImage("maps/path_map.png")
if image != 0:
    ret, x1, y1, x2, y2 = ola.GetDenseRect(image, 800, 600)
    ola.FreeImage(image)
java
import com.olaplug.OLAPlugServer;

OLAPlugServer ola = new OLAPlugServer();
long image = ola.LoadImage("maps/path_map.png");
if (image != 0) {
    ola.GetDenseRect(image, 800, 600, 0, 0, 0, 0);
    ola.FreeImage(image);
}
cpp
var ola = com("OlaPlug.OlaSoft")
var image = ola.LoadImage("maps/path_map.png")
if(image) {
    ola.GetDenseRect(image, 800, 600, 0, 0, 0, 0);
    ola.FreeImage(image)
}
vbscript
Set ola = CreateObject("OlaPlug.OlaSoft")
image = ola.LoadImage("maps/path_map.png")
If image <> 0 Then
    ola.GetDenseRect(image, 800, 600, 0, 0, 0, 0);
    ola.FreeImage(image)
End If
text
.局部变量 ola, OLAPlug
ola.创建 ()
image ＝ ola.LoadImage ("maps/path_map.png")
.如果真 (image ≠ 0)
    ola.GetDenseRect(image, 800, 600, 0, 0, 0, 0);
    ola.FreeImage (image)
.如果真结束
aardio
import OLAPlugServer;
var ola = OLAPlugServer();
var image = ola.LoadImage("maps/path_map.png");
if(image){
    ola.GetDenseRect(image, 800, 600, 0, 0, 0, 0);
    ola.FreeImage(image);
}
text
变量 ola <类型 = OLAPlugServer>
ola = 新建 OLAPlugServer
长整数 image = ola.LoadImage("maps/path_map.png")
如果真 (image ≠ 0)
{
    ola.GetDenseRect(image, 800, 600, 0, 0, 0, 0);
    ola.FreeImage(image)
}
cpp
#include "OLAPlugServer.h"

OLAPlugServer ola;
long image = ola.LoadImage("maps/path_map.png");
if (image != 0) {
    ola.GetDenseRect(image, 800, 600, 0, 0, 0, 0);
    ola.FreeImage(image);
}

原生 DLL 调用 ​

cpp
long instance = CreateCOLAPlugInterFace();
long image = LoadImage(instance, "maps/path_map.png");
if (image != 0) {
    int x1, y1, x2, y2;
    int ret = ola.GetDenseRect(image, 800, 600, x1, y1, x2, y2);
    FreeImage(instance, image);
}
csharp
using System.Runtime.InteropServices;

[DllImport("OLAPlug_x64.dll", CallingConvention = CallingConvention.StdCall)]
static extern long CreateCOLAPlugInterFace();

long instance = CreateCOLAPlugInterFace();
long image = LoadImage(instance, "maps/path_map.png");
if (image != 0) {
    int ret = ola.GetDenseRect(image, 800, 600, out int x1, out int y1, out int x2, out int y2);
    FreeImage(instance, image);
}
python
from ctypes import CDLL, c_int, c_int64

ola = CDLL("OLAPlug_x64.dll")
ola.CreateCOLAPlugInterFace.restype = c_int64
instance = ola.CreateCOLAPlugInterFace()
image = ola.LoadImage(instance, b"maps/path_map.png")
if image:
    ret, x1, y1, x2, y2 = ola.GetDenseRect(image, 800, 600)
    ola.FreeImage(instance, image)

返回值 ​

返回值说明
1成功。
0失败。