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Single-image Deblurring (Motion PSF Estimation)

[Click to download a package with the executable and examples]

This is an command-line executable for single image blind deconvolution (including motion PSF estimation). The command is:

deblur.exe inFileName outFileName kernelWidth kernelHeight noiseStr deblurStrength gamma weight1 weight2 weight3 weight4 weight5

Examples

Type "deblur Examples/picassoBlurImage.png Examples/picassoOut.png 27 27 0.008 0.2 1 0 0 0 0 0" in the command line and press ENTER.

It is also allowed to omit the last 6 parameters and the command can be like "deblur Examples/picassoBlurImage.png Examples/picassoOut.png 27 27 0.008 0.2". The last 6 parameters in this case will use default values.

There are two blurred images in the package. Deblur them respectively by executing the corresponding .bat file in the Windows.

Parameter Definition

inFileName	the file name of the blurred image (.bmp, .png, and .jpg files are supported)
outFileName	the file name of the output image (.bmp, .png, and .jpg files are supported)
kernelWidth	the estimated width (in pixel) of the blur kernel
kernelHeight	the estimated height (in pixel) of the blur kernel
noiseStr	measuring the level of image noise, 0.01 by default
deblurStrength	a parameter affecting the completeness of deblurring, 0.2 by default
gamma	for gamma correction, 1 by default
weight1~weight5	parameters for suppressing ringings, 0,0,0,0,0 by default

Parameter Tuning

We suggest tuning the parameter "noiseStr". In many cases, you can simply use the default values for all others parameters. The guideline is as follows.

kernelWidth/kernelHeight	large enough to contain the ground truth PSF
noiseStr	between [0.002, 0.5]
gamma	between [1, 2.5]. gamma=1 means no gamma correction.

System Requirement
Windows XP, 2003 Server, or 7.

The required memory and the computational time depend on the size of the blur image and the estimated kernel. For the "Picasso" example with size 800x532, the peak memory requirement is about 490 Megabytes.

Version Information

Distribution Version 1.0. We have optimized the code and fixed a number of bugs causing memory leak. A few parameters are automatically adaptive or with fixed values to reduce the difficulty of hand tuning.

This program was extensively tested, but is still not guaranteed to be bug-free and work properly with all versions of Windows. It is for education and research ONLY. The algorithm is based on "High-quality Motion Deblurring from a Single Image" published in SIGGRAPH 2008.

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