derIndex.push_back(2);
            orderIndex.push_back(1);
            orderIndex.push_back(0);

            // todo：normalizeToSubmeanToReorder当前只支持三通道输入
            let srcRgb = new fcv.Mat();
            fcv.cvtColor(srcRgba, srcRgb, fcv.ColorConvertType.CVT_PA_RGBA2PA_RGB);

            let dst = new fcv.Mat();
            fcv.normalizeToSubmeanToReorder(srcRgb, meanParams, stdParams, orderIndex, dst, 0);

            // 可视化
            resultHtml.append(dst.data().toString(