QT开发技术【opencv图片裁剪，平均哈希相似度判断，以及获取游戏窗口图片】

一、图片裁剪

int CJSAutoWidget::GetHouseNo(cv::Mat matMap)
{cv::imwrite(m_strPath + "/Data/map.png", matMap);for (int i = 0; i < 4; ++i){for (int j = 0; j < 6; ++j){// 计算当前子区域的矩形cv::Rect roi(j * 20, i * 17, 20, 17);// 提取子区域cv::Mat smallImage = matMap(roi);//double dDiffValue = GetDiffAvgHash(m_matBossImg, smallImage);// 小于20则认为相同cv::imwrite(m_strPath + "/Data/role_" + std::to_string(i * 6 + j + 1) + ".png", smallImage);std::cout  << " " << i * 6 + j + 1 << std::endl;if (IsRed(smallImage)){std::cout << "红色房间" << std::endl;}else{std::cout << "不是红色房间" << std::endl;}}}return 0;
}

在这里插入图片描述

二、平均哈希相似度判断

int CJSAutoWidget::GetDiffAvgHash(cv::Mat matSrc1, cv::Mat matSrc2)
{cv::Mat matDst1, matDst2;cv::resize(matSrc1, matDst1, cv::Size(8, 8), 0, 0, cv::INTER_CUBIC);cv::resize(matSrc2, matDst2, cv::Size(8, 8), 0, 0, cv::INTER_CUBIC);cv::cvtColor(matDst1, matDst1, cv::COLOR_BGR2GRAY);cv::cvtColor(matDst2, matDst2, cv::COLOR_BGR2GRAY);int nAvg1 = 0, nAvg2 = 0;int nArr1[64], nArr2[64];for (int i = 0; i < 8; i++){uchar* data1 = matDst1.ptr<uchar>(i);uchar* data2 = matDst2.ptr<uchar>(i);int nTmp = i * 8;for (int j = 0; j < 8; j++){int nTmp1 = nTmp + j;nArr1[nTmp1] = data1[j] / 4 * 4;nArr2[nTmp1] = data2[j] / 4 * 4;nAvg1 += nArr1[nTmp1];nAvg2 += nArr2[nTmp1];}}nAvg1 /= 64;nAvg2 /= 64;for (int i = 0; i < 64; i++){nArr1[i] = (nArr1[i] >= nAvg1) ? 1 : 0;nArr2[i] = (nArr2[i] >= nAvg2) ? 1 : 0;}int nDiffNum = 0;for (int i = 0; i < 64; i++){if (nArr1[i] != nArr2[i]){++nDiffNum;}}return nDiffNum;
}

三、获取游戏窗口图片

QImage CJSAutoWidget::GetDNFImage()
{HWND hwnd = FindWindowA(NULL, m_strGameName.c_str());if (hwnd == NULL) {std::cout << "无法找到游戏窗口" << std::endl;return QImage();}// 获取窗口的位置和大小RECT rect;::GetWindowRect(hwnd, &rect);// 使用Qt截图窗口QImage screenImage = QGuiApplication::primaryScreen()->grabWindow((WId)hwnd).toImage();return screenImage;
}void CJSAutoWidget::SlotCaptureImage()
{m_pTimer->stop();QImage image = GetDNFImage();if (image.isNull()) {return;}QImage qImageMain = image.scaled(ui->label_Map->size(), Qt::KeepAspectRatio);ui->label_Main->setPixmap(QPixmap::fromImage(qImageMain));//裁剪地图int x = image.width() - 125;int y = 40;int width = 120;int height = 70; QImage imageMap = image.copy(x, y, width, height);ui->label_Map->setPixmap(QPixmap::fromImage(imageMap.scaled(ui->label_Map->size(), Qt::KeepAspectRatio)));cv::Mat matMap = QImageToMat(imageMap);GetHouseNo(matMap);
}