diff --git a/opencv/opencv_composite_stereo.py b/opencv/opencv_composite_stereo.py
index 254715d..2476335 100755
--- a/opencv/opencv_composite_stereo.py
+++ b/opencv/opencv_composite_stereo.py
@@ -18,15 +18,17 @@
 
     # GStreamer string, may be possible to optimize this further?
     gst_string = '''
-nvarguscamerasrc sensor-id=0 wbmode=0 aelock=true ispdigitalgainrange=\"1 8\" gainrange=\"1 48\" name=left 
-nvarguscamerasrc sensor-id=1 wbmode=0 aelock=true ispdigitalgainrange=\"1 8\" gainrange=\"1 48\" name=right
+nvarguscamerasrc sensor-id=0 wbmode=1 ispdigitalgainrange=\"1 8\" gainrange=\"1 48\" tnr-mode=0 exposuretimerange="2000 20000000" saturation=1.3 name=left 
+nvarguscamerasrc sensor-id=1 wbmode=1 ispdigitalgainrange=\"1 8\" gainrange=\"1 48\" tnr-mode=0 exposuretimerange="2000 20000000" saturation=1.3 name=right
 glstereomix name=mix 
-left. ! video/x-raw(memory:NVMM),width={image_size[1]},height={image_size[0]},framerate={framerate}/1 ! nvvidconv ! video/x-raw ! glupload ! mix.
+left. ! video/x-raw(memory:NVMM),width={image_size[1]},height={image_size[0]},framerate={framerate}/1 ! nvvidconv ! video/x-raw ! glupload  ! mix.
 right. ! video/x-raw(memory:NVMM),width={image_size[1]},height={image_size[0]},framerate={framerate}/1 ! nvvidconv ! video/x-raw ! glupload ! mix. 
-mix. ! video/x-raw(memory:GLMemory),multiview-mode=side-by-side ! glcolorconvert ! gldownload ! 
-        queue ! video/x-raw,format=BGRx ! videoconvert ! video/x-raw,format=BGR ! appsink'
+mix. ! video/x-raw(memory:GLMemory),multiview-mode=side-by-side  ! glcolorconvert ! gldownload ! 
+        queue ! video/x-raw,format=BGRx  ! videoconvert ! video/x-raw,format=BGR ! appsink'
 '''
 
+# ! glcolorbalance constrast=0.1 brightness=0.2 saturation=1.2
+
     gst_string = gst_string.format(image_size=image_size, framerate=framerate)
     print(gst_string)
 
diff --git a/opencv/opencv_sobel.py b/opencv/opencv_sobel.py
index 79feeef..4eb6d91 100755
--- a/opencv/opencv_sobel.py
+++ b/opencv/opencv_sobel.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 #
 # Sample script which uses OpenCV to read images from one camera,
 # then runs some basic image processing ... Gaussian blue and Sobel edges.
@@ -17,7 +17,7 @@
     framerate = 10
 
     # GStreamer string, may be possible to optimize this further?
-    gst_string = f"nvarguscamerasrc sensor-id={camera_num} ! video/x-raw(memory:NVMM),width={image_size[1]},height={image_size[0]},framerate={framerate}/1 ! nvvidconv ! queue ! video/x-raw,pixel-format=(string)BGR ! videoconvert ! video/x-raw,pixel-format=(string)BGR ! appsink"
+    gst_string = f'nvarguscamerasrc sensor-id={camera_num} wbmode=0 aelock=true ispdigitalgainrange="1 8" gainrange="1 48" exposuretimerange="35000 100000000" ! video/x-raw(memory:NVMM),width={image_size[1]},height={image_size[0]},framerate={framerate}/1 ! nvvidconv ! queue ! video/x-raw,pixel-format=(string)BGR ! gamma gamma=0.7 ! videobalance brightness=0.2 !  videoconvert ! video/x-raw,pixel-format=(string)BGR ! appsink'
         
     print(f"Using GStreamer configuration: {gst_string}")