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; }

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); }