diff --git a/doc/tutorials/images/opencv_ios.png b/doc/tutorials/images/opencv_ios.png
index 7937ec17c..ce2031d7c 100644
Binary files a/doc/tutorials/images/opencv_ios.png and b/doc/tutorials/images/opencv_ios.png differ
diff --git a/doc/tutorials/introduction/table_of_content_introduction/images/opencv_ios.png b/doc/tutorials/introduction/table_of_content_introduction/images/opencv_ios.png
index 7937ec17c..ce2031d7c 100644
Binary files a/doc/tutorials/introduction/table_of_content_introduction/images/opencv_ios.png and b/doc/tutorials/introduction/table_of_content_introduction/images/opencv_ios.png differ
diff --git a/doc/tutorials/ios/hello/images/header_directive.png b/doc/tutorials/ios/hello/images/header_directive.png
index 7e41e0bd6..c99899345 100644
Binary files a/doc/tutorials/ios/hello/images/header_directive.png and b/doc/tutorials/ios/hello/images/header_directive.png differ
diff --git a/doc/tutorials/ios/hello/images/linking_opencv_ios.png b/doc/tutorials/ios/hello/images/linking_opencv_ios.png
index cf82caf23..a470efce8 100644
Binary files a/doc/tutorials/ios/hello/images/linking_opencv_ios.png and b/doc/tutorials/ios/hello/images/linking_opencv_ios.png differ
diff --git a/doc/tutorials/ios/hello/images/output.png b/doc/tutorials/ios/hello/images/output.png
index 13d943381..cb0f7fb27 100644
Binary files a/doc/tutorials/ios/hello/images/output.png and b/doc/tutorials/ios/hello/images/output.png differ
diff --git a/doc/tutorials/ios/hello/images/view_did_load.png b/doc/tutorials/ios/hello/images/view_did_load.png
index 6573b1dcd..bb805c268 100644
Binary files a/doc/tutorials/ios/hello/images/view_did_load.png and b/doc/tutorials/ios/hello/images/view_did_load.png differ
diff --git a/doc/tutorials/ios/table_of_content_ios/images/image_effects.png b/doc/tutorials/ios/table_of_content_ios/images/image_effects.png
old mode 100755
new mode 100644
index 1a675ce74..25edb668f
Binary files a/doc/tutorials/ios/table_of_content_ios/images/image_effects.png and b/doc/tutorials/ios/table_of_content_ios/images/image_effects.png differ
diff --git a/doc/tutorials/ios/table_of_content_ios/images/intro.png b/doc/tutorials/ios/table_of_content_ios/images/intro.png
index 4f54cfb91..5f2dc1aa4 100644
Binary files a/doc/tutorials/ios/table_of_content_ios/images/intro.png and b/doc/tutorials/ios/table_of_content_ios/images/intro.png differ
diff --git a/doc/tutorials/ios/video_processing/images/xcode_hello_ios_framework_drag_and_drop.png b/doc/tutorials/ios/video_processing/images/xcode_hello_ios_framework_drag_and_drop.png
index 8d935c233..f745f4bbc 100644
Binary files a/doc/tutorials/ios/video_processing/images/xcode_hello_ios_framework_drag_and_drop.png and b/doc/tutorials/ios/video_processing/images/xcode_hello_ios_framework_drag_and_drop.png differ
diff --git a/doc/tutorials/ios/video_processing/images/xcode_hello_ios_frameworks_add_dependencies.png b/doc/tutorials/ios/video_processing/images/xcode_hello_ios_frameworks_add_dependencies.png
index 394eec2c3..df9c17979 100644
Binary files a/doc/tutorials/ios/video_processing/images/xcode_hello_ios_frameworks_add_dependencies.png and b/doc/tutorials/ios/video_processing/images/xcode_hello_ios_frameworks_add_dependencies.png differ
diff --git a/doc/tutorials/ios/video_processing/images/xcode_hello_ios_viewcontroller_layout.png b/doc/tutorials/ios/video_processing/images/xcode_hello_ios_viewcontroller_layout.png
index bb523967c..22fc7fc39 100644
Binary files a/doc/tutorials/ios/video_processing/images/xcode_hello_ios_viewcontroller_layout.png and b/doc/tutorials/ios/video_processing/images/xcode_hello_ios_viewcontroller_layout.png differ
diff --git a/doc/tutorials/viz/table_of_content_viz/images/image_effects.png b/doc/tutorials/viz/table_of_content_viz/images/image_effects.png
index 1a675ce74..25edb668f 100644
Binary files a/doc/tutorials/viz/table_of_content_viz/images/image_effects.png and b/doc/tutorials/viz/table_of_content_viz/images/image_effects.png differ
diff --git a/doc/tutorials/viz/table_of_content_viz/images/intro.png b/doc/tutorials/viz/table_of_content_viz/images/intro.png
index 4f54cfb91..5f2dc1aa4 100644
Binary files a/doc/tutorials/viz/table_of_content_viz/images/intro.png and b/doc/tutorials/viz/table_of_content_viz/images/intro.png differ
diff --git a/modules/highgui/src/files_Qt/Milky/48/15.png b/modules/highgui/src/files_Qt/Milky/48/15.png
index b54b7d658..524ab7f09 100644
Binary files a/modules/highgui/src/files_Qt/Milky/48/15.png and b/modules/highgui/src/files_Qt/Milky/48/15.png differ
diff --git a/modules/highgui/src/files_Qt/Milky/48/36.png b/modules/highgui/src/files_Qt/Milky/48/36.png
index c6e17fdd5..a6d75ffd7 100644
Binary files a/modules/highgui/src/files_Qt/Milky/48/36.png and b/modules/highgui/src/files_Qt/Milky/48/36.png differ
diff --git a/modules/highgui/src/files_Qt/Milky/48/8.png b/modules/highgui/src/files_Qt/Milky/48/8.png
index ab3280f58..7301dccfd 100644
Binary files a/modules/highgui/src/files_Qt/Milky/48/8.png and b/modules/highgui/src/files_Qt/Milky/48/8.png differ
diff --git a/modules/highgui/src/files_Qt/Milky/64/20.png b/modules/highgui/src/files_Qt/Milky/64/20.png
index cb5cd3788..fbd1fee4f 100644
Binary files a/modules/highgui/src/files_Qt/Milky/64/20.png and b/modules/highgui/src/files_Qt/Milky/64/20.png differ
diff --git a/modules/highgui/src/files_Qt/Milky/64/3.png b/modules/highgui/src/files_Qt/Milky/64/3.png
index 2b6cdca8a..be382224b 100644
Binary files a/modules/highgui/src/files_Qt/Milky/64/3.png and b/modules/highgui/src/files_Qt/Milky/64/3.png differ
diff --git a/modules/imgproc/doc/pics/bayer.png b/modules/imgproc/doc/pics/bayer.png
index 92fe2ddb8..0a2494c40 100644
Binary files a/modules/imgproc/doc/pics/bayer.png and b/modules/imgproc/doc/pics/bayer.png differ
diff --git a/modules/imgproc/doc/pics/integral.png b/modules/imgproc/doc/pics/integral.png
index 97a69c625..6e3beba0f 100644
Binary files a/modules/imgproc/doc/pics/integral.png and b/modules/imgproc/doc/pics/integral.png differ