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DirectShow Filters

Video Processing / Enhancements

Included Filters
The following DirectShow filters are included with the LEADTOOLS Multimedia SDK.

LEAD Video Add Filter - Brightens a frame by adding two or more frames. Useful in correcting video taken in low-light conditions. For example, astronomers or video surveillance applications should find this filter useful.

LEAD Auto Contrast Filter -Changes the contrast without changing colors (hue). It makes the dark values darker and the light values lighter, which automatically enhances shadows and brightens the video stream.

LEAD Auto Intensity Filter - Performs color leveling on the RGB channel (the sum of the R, G, and B channels), without changing colors. It makes the dark values darker and the light values lighter, which automatically enhances shadows and brightens the video stream. It also maximizes the tonal range of the image and enhances the contrast and intensity using the image's histogram and a color distribution-based algorithm.

LEAD Auto Level Filter - Performs color leveling on the individual R, G and B channels, treating each of the R, G and B channels as a separate entity, without changing colors. It makes the dark values darker and the light values lighter, which automatically enhances shadows and brightens the video stream.

LEAD Video Color Replace Filter - Replaces any range of colors in a video stream with another range of colors.

LEAD Video Color Filter - Adjusts Hue, Saturation, Brightness, Contrast.

LEAD Color Space Converter - Converts YUV data to RGB data. The LEAD Color Space Converter supports the following input formats: YUY2, YVYU, IYU2, IYU1, UYVY, Y41P, YVU9, IY41, IUYV, YV12, I420, IYUV, V210, v210, and NV12. Converts to and from RGB1 grayscale, RGB1 color, RGB4 grayscale, RGB4 color, RGB8 color, RGB8 grayscale, RGB15 (5:5:5), RGB16 (5:6:5), RGB32, RGB24, RGB555, RGB565, and 12 and 16 bit grayscale color spaces.

LEAD Video Deblocking Filter -Smoothes edges and removes the blocky artifacts present in highly compressed MJPEG or MPEG movies. Extremely useful for improving movies created by digital cameras that can take highly compressed, small video clips.

LEAD Video Edge Enhance Filter - Improves the quality of some movies that look "washed out" because of resizing. The LEAD Video Edge Enhance Filter is similar to Video Unsharp Mask Filter, but much faster.

LEAD Video Mosaic Filter - Conceals a specific area in the video by making it blocky.

LEAD Video Gamma Correction Filter - Applies Gamma Correction (nonlinear brightness) to a video.

LEAD Video Histogram View Filter - Draws the running histogram of a video stream in its property page. The filter also provides access to the histogram array through its programming interface. The histogram can be viewed for a single channel or for all channels.

Evaluation Filters
Evaluation versions of these DirectShow filters are included with the LEADTOOLS Multimedia SDK. They may be used for development, but may require additional licensing before distributing your application. Contact sales@leadtools.com for more information.

LEAD Video Deinterlace Filter - Deinterlaces video with a pattern, deinterlaces only a region of interest (rectangle), and specifies segments in the video to deinterlace and how to deinterlace the segment (no deinterlace, interlace, deinterlace with pattern). There is also an “Auto Deinterlace” option which will check the video for interlacing and apply deinterlacing only if necessary.

LEAD Video Resize Filter - Resizes the video by adjusting the width and height of the frames using normal resize, resample (bilinear interpolation), bicubic interpolation, or Bresenham interpolation.

LEAD Video Crop Filter - Play, convert or capture only a specific rectangular area within the video.

LEAD Video Rotation Filter - Flips, Reverses, Rotates 90, 180, and 270 degrees. Very useful when certain devices capture video in a rotated state.

LEAD Frame Rate Control Filter - The Frame Rate Control filter provides changes the frame rate of the passing video stream.

LEAD Video Motion Detection - Motion is emphasized by a frame around the motion and/or displaying a frame of only the motion (areas of the frame without motion are black). Programmatically, the filter will fire a callback each time a frame is received. If motion is detected, the bounding rectangles containing the motion can be retrieved. The possible notifications received with each frame are motion has started, motion, motion has stopped and still. Filter settings include object size, sensitivity and more.

LEAD Video Unsharp Mask Filter - Powerful algorithm for edge enhancing. Improves the quality of some movies that look "washed out" because of resizing. The Video Unsharp Mask Filter produces better results than Video Edge Enhance.

LEAD Video Histogram Equalize Filter - Automatically increases the contrast and details in videos by using the histogram. This effect enhances videos that are too dark or too bright.

LEAD Video Text Overlay Filter - Adds static or moving text to videos with control over the font, font size, border and background. Additionally, an external XML file can be used to specify text to appear on specific frames.

LEAD Video Overlay Filter - Superimpose an image or another video into a video.

LEAD Video Image Overlay Filter - Superimpose an image logo into a video.

LEAD Video Callback Filter - Each video sample is provided in a callback for additional processing before being forwarded to the next component in the graph. The filter can be used during capture, playback or conversion.

LEAD Theora Encoder - The LEAD Theora Encoder is based on a multimedia framework and API produced by Microsoft for software developers to perform various operations with media files. Most Windows video-related applications on Windows, such as Microsoft's Windows Media Player, use DirectShow to manage multimedia content. Theora is an open video codec developed by the Xiph.org foundation aimed at offering a patent-free alternative to MPEG-4. The compression is comparable to MPEG-2, H.263, MPEG-4 and H.264 and, unlike these codecs, the Theora codec is free of patent fees.

Click here for LEADTOOLS Multimedia Eval including DirectShow Filters

DICOM and 16 bit grayscale functionality require a LEADTOOLS Medical Imaging product in conjunction with a LEADTOOLS Multimedia product. Contact Sales@LEADTOOLS.com for more information.

LEADTOOLS Sales: 704-332-5532 | sales@leadtools.com
LEADTOOLS Support: 704-372-9681 | support@leadtools.com

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