Howtosignalprocessing
- What is blurring method?
- What is blurring in computer vision?
- What is a blurring filter?
- Is blurring reversible?
What is blurring method?
Roughly speaking, blurring an image is make the image less sharp. This can be done by smoothing the color transition between the pixels. To accomplish this target, we need to apply a convolution operation of a specialized matrix, called kernel, to the image's matrix.
What is blurring in computer vision?
When we blur an image, we make the colour transition from one side of an edge in the image to another smooth rather than sudden. The effect is to average out rapid changes in pixel intensity. A blur is a very common operation we need to perform before other tasks such as thresholding.
What is a blurring filter?
The Blur filters soften a selection or an image and are useful for retouching. They smooth transitions by averaging the color values of pixels next to the hard edges of defined lines and shaded areas. Blur. Eliminates noise where significant color transitions occur in an image.
Is blurring reversible?
It's not possible to completely reverse the blurring, since it is lossy, but a lot of information can be restored (also see here (PDF)). A motion blurred photo will be easier to restore than something that's simply out of focus, though both can be restored to a degree.
