diff --git a/hgdriver/3rdparty/opencv/include/opencv2/imgcodecs/imgcodecs_c.h b/hgdriver/3rdparty/opencv/include/opencv2/imgcodecs/imgcodecs_c.h
index c36dac3..e821999 100644
--- a/hgdriver/3rdparty/opencv/include/opencv2/imgcodecs/imgcodecs_c.h
+++ b/hgdriver/3rdparty/opencv/include/opencv2/imgcodecs/imgcodecs_c.h
@@ -85,6 +85,13 @@ enum
     CV_IMWRITE_JPEG_RST_INTERVAL =4,
     CV_IMWRITE_JPEG_LUMA_QUALITY =5,
     CV_IMWRITE_JPEG_CHROMA_QUALITY =6,
+
+    // add for DPI on 2022-10-14
+    CV_IMWRITE_JPEG_RESOLUTION_UNIT = 7,    // 0 - unknown(default value), 1 - dots/inch, 2 - dots/cm
+    CV_IMWRITE_JPEG_RESOLUTION_X = 8,       // default value - 1
+    CV_IMWRITE_JPEG_RESOLUTION_Y = 9,       // default value - 1
+    // ENDED for DPI
+
     CV_IMWRITE_PNG_COMPRESSION =16,
     CV_IMWRITE_PNG_STRATEGY =17,
     CV_IMWRITE_PNG_BILEVEL =18,
diff --git a/hgdriver/3rdparty/opencv/lib/kylin/loongarch64/libIlmImf.a b/hgdriver/3rdparty/opencv/lib/kylin/loongarch64/libIlmImf.a
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diff --git a/hgdriver/3rdparty/opencv/lib/kylin/loongarch64/libopencv_calib3d.a b/hgdriver/3rdparty/opencv/lib/kylin/loongarch64/libopencv_calib3d.a
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diff --git a/hgdriver/3rdparty/opencv/lib/kylin/loongarch64/libopencv_features2d.a b/hgdriver/3rdparty/opencv/lib/kylin/loongarch64/libopencv_features2d.a
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diff --git a/hgdriver/3rdparty/opencv/lib/kylin/loongarch64/libopencv_flann.a b/hgdriver/3rdparty/opencv/lib/kylin/loongarch64/libopencv_flann.a
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diff --git a/hgdriver/3rdparty/opencv/lib/kylin/loongarch64/libopencv_highgui.a b/hgdriver/3rdparty/opencv/lib/kylin/loongarch64/libopencv_highgui.a
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diff --git a/hgdriver/3rdparty/opencv/lib/kylin/loongarch64/libopencv_imgproc.a b/hgdriver/3rdparty/opencv/lib/kylin/loongarch64/libopencv_imgproc.a
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diff --git a/hgdriver/3rdparty/opencv/lib/kylin/loongarch64/libopencv_ml.a b/hgdriver/3rdparty/opencv/lib/kylin/loongarch64/libopencv_ml.a
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diff --git a/hgdriver/3rdparty/opencv/lib/kylin/loongarch64/libopencv_objdetect.a b/hgdriver/3rdparty/opencv/lib/kylin/loongarch64/libopencv_objdetect.a
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diff --git a/hgdriver/3rdparty/opencv/lib/kylin/loongarch64/libopencv_photo.a b/hgdriver/3rdparty/opencv/lib/kylin/loongarch64/libopencv_photo.a
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diff --git a/hgdriver/3rdparty/opencv/lib/kylin/loongarch64/libopencv_shape.a b/hgdriver/3rdparty/opencv/lib/kylin/loongarch64/libopencv_shape.a
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diff --git a/hgdriver/3rdparty/opencv/lib/kylin/loongarch64/libopencv_stitching.a b/hgdriver/3rdparty/opencv/lib/kylin/loongarch64/libopencv_stitching.a
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diff --git a/hgdriver/3rdparty/opencv/lib/kylin/loongarch64/libopencv_superres.a b/hgdriver/3rdparty/opencv/lib/kylin/loongarch64/libopencv_superres.a
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diff --git a/hgdriver/3rdparty/opencv/lib/kylin/loongarch64/libopencv_video.a b/hgdriver/3rdparty/opencv/lib/kylin/loongarch64/libopencv_video.a
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diff --git a/hgdriver/3rdparty/opencv/lib/kylin/loongarch64/libopencv_videoio.a b/hgdriver/3rdparty/opencv/lib/kylin/loongarch64/libopencv_videoio.a
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diff --git a/hgdriver/3rdparty/opencv/lib/kylin/loongarch64/libopencv_videostab.a b/hgdriver/3rdparty/opencv/lib/kylin/loongarch64/libopencv_videostab.a
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diff --git a/hgdriver/3rdparty/opencv/lib/kylin/loongarch64/libquirc.a b/hgdriver/3rdparty/opencv/lib/kylin/loongarch64/libquirc.a
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diff --git a/hgdriver/3rdparty/opencv/lib/kylin/loongarch64/libzlib.a b/hgdriver/3rdparty/opencv/lib/kylin/loongarch64/libzlib.a
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diff --git a/hgdriver/3rdparty/opencv/lib/kylin/loongarch64/pkgconfig/opencv.pc b/hgdriver/3rdparty/opencv/lib/kylin/loongarch64/pkgconfig/opencv.pc
new file mode 100644
index 0000000..add4e3a
--- /dev/null
+++ b/hgdriver/3rdparty/opencv/lib/kylin/loongarch64/pkgconfig/opencv.pc
@@ -0,0 +1,14 @@
+# Package Information for pkg-config
+
+prefix=/home/huagao/sane/code_app/third_party/opencv/kylin/loongarch64/opencv-3.4.16/build/release
+exec_prefix=${prefix}
+libdir=${exec_prefix}/lib
+includedir_old=${prefix}/include/opencv
+includedir_new=${prefix}/include
+
+Name: OpenCV
+Description: Open Source Computer Vision Library
+Version: 3.4.16
+Libs: -L${exec_prefix}/lib -lopencv_dnn -lopencv_highgui -lopencv_ml -lopencv_objdetect -lopencv_shape -lopencv_stitching -lopencv_superres -lopencv_videostab -lopencv_calib3d -lopencv_videoio -lopencv_imgcodecs -lopencv_features2d -lopencv_video -lopencv_photo -lopencv_imgproc -lopencv_flann -lopencv_core
+Libs.private: -L${exec_prefix}/share/OpenCV/3rdparty/lib -llibprotobuf -llibjpeg-turbo -llibwebp -llibpng -llibtiff -llibjasper -lIlmImf -lzlib -lquirc -ldl -lm -lpthread -lrt
+Cflags: -I${includedir_old} -I${includedir_new}