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Project, ideas: Dr. Dmitriy Vatolin
Version 0.5, intraframe algorithm: Maxim Makhinya
Version 1.0, interframe algorithm, bug fixing: Alexey Moskvin

Version 1.01 - parameters saving to JOB files fixed

The filter allows adjusting image brightness and contrast with minimum loss of details, also supports automatic mode.

Main features

• The filter doesn't shine bright areas, and doesn't move dark areas to 0 brightness value, keeping details in them.
• Automatic brightness tuning mode, when contrast is set (useful for long mixed films).
• Automatic brightness & contrast adjust mode (useful for long mixed professionally created films).
• Color correction feature - usable for hard contrast correction of nearly black-and-white movies.
• Adjustable intraframe contrast & brightness accuracy.
• Controllable noise influence in final parameters in automatic parameters calculation.
• Careful intrascene modification of parameters.
• Automatic detection of scene replacement.
• Supports Job Control and AviSynth.

Settings

In the filter's setting:

• The set of presets for brightness & contrast (auto correcting manual settings, full auto mode, manual settings, some brightness/contrast presets)
• Settings for decrease / increase color component of image
• Settings for selecting image borders, which allows to prevent hard bright/dark noise influence in filter's work (with set of presets)
• Mode, when global brightness & contrast settings are recalculated after scene change only and are become more stable during one scene.

Settings:
Brightness & Contrast Settings

1. Contrast - contrast adjust (>1 - increase, <1 - decrease)
2. Brightness - brightness shift
3. Color Correction - >0 - increase color component, <0 - decrease color component
4. Intraframe accuracy - threshold, if it is exceeded brightness & contrast coefficients are "blurred" for better details processing

Script example for AviSynth

LoadVirtualDubPlugin("...\Virtual Dub\plugins\MSU_SmartBrightness.vdf","MSUSmartBrightness", 0)  
clip=AVISource("D:\Video\Samples\MSU.avi", false, "RGB24")
clip.ConvertToRGB32.MSUSmartBrightness(0, 150, 100, 0)

Examples

We shall compare Smart Brightness and Contrast Filter to Photoshop filter using a portrait of M. Lomonosov as the first example.

Source image

Image processed by Photoshop

Image processed by the Filter

Let us zoom in so as to see the differences better and take a close look at areas outlined in red.

Source image
Image processed by Photoshop	Image processed by the Filter

The left histogram tells that Photoshop cares little about bright and dark pixels, it simply washes or blacks them out. The right one tells that the filter tends to keep maximum detail and takes good care of bright and dark pixels.

And one more similar example with histograms.

Source image	Histogram of source image
Image processed by Photoshop	Image processed by the Filter
Histogram	Histogram

Frames from sequence MSU.avi: Original frames Processed with Brightness & Contrast from Photoshop Processed with MSU Smart Brightness & Contrast in automatic mode (auto correcting manual settings)

Download

• Filter for VirtualDub (ZIP, 34 KB). To use, unpack to plugin folder.
• Filter license

Other resources

Video resources:

Public MSU video filters Here are available VirtualDub and AviSynth filters. Commonly we develop a whole family of some kind of a filter. Generally there are also versions optimized for PC and hardware implementations (ASIC/FPGA/DSP). These optimized versions can be licensed to companies. Please contact us for details via video(at)graphics.cs.msu_ru. MSU Cartoon Restore (New!) MSU Noise Estimation MSU Frame Rate Conversion MSU Image Restoration MSU Denoising (Top!) (New!) MSU Old Cinema MSU Deblocking (Top!) MSU Smart Brightness and Contrast (Top!) MSU Smart Sharpen (Top!) MSU Noise generation MSU Noise estimation MSU Motion Estimation Information MSU Subtitles removal MSU Logo removal (Top!) MSU Deflicker (Top!) MSU Field Shift Fixer AviSynth plug-in MSU StegoVideo MSU Cartoonizer (Top!) MSU SmartDeblocking (Top!) MSU Color Enhancement MSU Old Color Restoration MSU filters FAQ (Read me!) MSU filters statistics	MSU filters for companies We are working with Intel, Samsung, RealNetworks and other companies on adapting our filters other video processing algorithms for specific video streams, applications and hardware like TV-sets, graphics cards, etc. Some of such projects are non-exclusive. Also we have internal researches. Please let us know via video(at)graphics.cs.msu_ru if you are interested in acquiring a license for such filters or making a custom R&D project on video processing, compression, computer vision. Automatic Objects Segmentation Semiautomatic Objects Segmentation New Frame Rate Conversion New Deinterlacer MSU-Samsung Deinterlacing Project Digital TV Signal Enhancement Old Film Recovery Tuner TV Restore Panorama Video2Photo SuperResolution SuperPrecision MSU-Samsung image and video resampling MSU-Samsung Frame Rate Conversion Motion Phase filter Deshaker (video stabilization) Film Grain/Degrain filter Deblurring filter Video Content Search
Codecs comparisons Objective and subjective quality evaluation tests for video and image codecs Options Analysis of Codec x264 (New!) 4-th MPEG4-AVC/H.264 Comparison (Top!) Lossless Video Codecs Comparison 2007 3-rd MPEG4-AVC/H.264 Comparison HD Photo and JPEG 2000 Comparison MPEG-2 Decoders Crash Test (Top!) Subjective Compar. of 4 Modern Codecs (Top!) 2-nd MPEG-4 AVC/H.264 Comparison (Top!) FAQ of 2-nd H.264 Comparison 1-st MPEG-4 AVC/H.264 Codecs Comparison FAQ of 1-st H.264 Comparison JPEG 2000 Image Codecs Comparison (Top!) Lossless Video Codecs Comparison 2004 MPEG-4 SP/ASP Codecs Comparison (Top!) Video codecs comparison (old) Ext. link: x264 parameters efficiency comparison	Video quality metrics Programs with different objective and subjective video quality metrics implementation MSU Video Quality Metric - objective metrics for codecs and filters comparison (Top!) Implemented metrics short info: PSNR, Delta, MSAD, MSE, SSIM, VQM, MSU Blurring, MSU Blocking MSU Brightness Flicking Metric MSU Brightness Independent PSNR MSU Drop Frame Metric MSU Noise Estimation Metric MSU VQM Metric Tool FAQ MSU Human Perceptual Quality Metric - several metrics for exact visual tests (Top!) Implemented metrics short info: ITU-R BT.500-11: DSIS, DSCQS I & II, SCACJ; EBU: SAMVIQ; MSUCQE MSU PVQ Metric Tool FAQ
Video codecs projects Different research and development projects on video codecs MSU Lossless Video Codec (Top!) MSU Screen Capture Lossless Codec (Top!) MSU MPEG-2 Video Codec x264 Codec Improvement	Other Other information Crazy gallery (filters screams :) License for commercial usage of MSU VideoGroup Public Software (please be careful: some soft like metrics has another license!)

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Last updated: 12-October-2007

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Project updated by
Server Team and MSU Video Group

Project sponsored by YUVsoft Corp.

Project supported by MSU Graphics & Media Lab