BANDING NOISE DETECTOR FOR DIGITAL IMAGES

摘要

A method and apparatus are provided for detecting banding noise in a digital signal representative of an image. The method includes determining, by a banding noise detector, a count of increment steps in pixel values and a count of decrement steps in pixel values along a filter direction in a neighborhood of a current pixel of the image, checking, by the banding noise detector, if the count of increment steps or the count of decrement steps in the neighborhood of a current pixel exceeds a step threshold value, and classifying, by the banding noise detector, the current pixel as being located in the banding noise zone if the count of increment steps or the count of decrement steps does not exceed the step threshold value.

主权项

1. A method for detecting banding noise in a signal representative of an image, comprising:
determining, by a banding noise detector, a count of increment steps in pixel values and a count of decrement steps in pixel values along a filter direction in a neighborhood of a current pixel of the image; checking, by the banding noise detector, if the count of increment steps or the count of decrement steps in the neighborhood of the current pixel exceeds a step threshold value; and classifying, by the banding noise detector, the current pixel as being located in a banding noise zone if the count of increment steps or the count of decrement steps does not exceed the step threshold value.