System and method for supporting image denoising based on neighborhood block dimensionality reduction

An image processing method, comprising:

• obtaining one or more characterization values of a group of pixels associated with a denoising pixel in a filter window of an image, wherein the one or more characterization values are determined based on gradient information of the group of pixels;
• using the one or more characterization values to determine a similarity between the denoising pixel and a denoising reference pixel in the filter window of the image;
• and
• calculating a denoised value for the denoising pixel based on the determined similarity between the denoising pixel and the denoising reference pixel.

An image processing apparatus, comprising:

• at least one memory configured to store instructions for execution by one or more processors in the image processing apparatus;
• and
• one or more processors configured to execute the instructions stored in the at least one memory, the instructions when executed by the one or more processors configure the image processing apparatus to:
• obtain one or more characterization values of a group of pixels associated with a denoising pixel in a filter window of an image, wherein the one or more characterization values are determined based on gradient information of the group of pixels;
• utilize the one or more characterization values to determine a similarity between the denoising pixel and a denoising reference pixel in the filter window of the image;
• and
• calculate a denoised value for the denoising pixel based on the determined similarity between the denoising pixel and the denoising reference pixel.

A non-transitory computer-readable medium with instructions stored thereon, that when executed by a processor, perform the steps comprising:

• obtaining one or more characterization values of a group of pixels associated with a denoising pixel in a filter window of an image, wherein the one or more characterization values are determined based on gradient information of the group of pixels;
• using the one or more characterization values to determine a similarity between the denoising pixel and a denoising reference pixel in the filter window of the image;
• and
• calculating a denoised value for the denoising pixel based on the determined similarity between the denoising pixel and the denoising reference pixel.

An image processing system, comprising:

• a first processor configured to obtain one or more characterization values of a group of pixels associated with a denoising pixel in a filter window of an image, wherein the one or more characterization values are determined based on gradient information of the group of pixels;
• a second processor configured to utilize the one or more characterization values to determine a similarity between the denoising pixel and a denoising reference pixel in the filter window of the image;
• and
• a third processor configured to calculate a denoised value for the denoising pixel based on the determined similarity between the denoising pixel and the denoising reference pixel.