Topic 5: Measuring image blur/sharpness¶

1. Read and discuss the paper by CT Vu et al..
2. Investigate the shortcomings of the slope of the magnitude spectrum ($\alpha$) and TV as presented in the paper for sharpness measurement.
3. Choose two other sharpness measures, discussed in Section IIA-C for comparison. You can either implement them by yourself or use the available codes.
4. To evaluate this method, try to capture/synthesize your own blurred images. Try to cover several possible scenario for blurring an image, e.g. motion blur, out of focus, local blur due to a moving object.
5. (Extra): Obtain one of the image quality assessment database mentioned in the paper and evaluate your implementation on it to compare your result with subjective ratings.

References:

C. T. Vu, T. D. Phan and D. M. Chandler, S3: A Spectral and Spatial Measure of Local Perceived Sharpness in Natural Images,” in IEEE Transactions on Image Processing, vol. 21, no. 3, pp. 934-945, March 2012.