Image processing apparatus for scaling an input image according to various image processing requirements and method thereof

An image processing apparatus for scaling an input image, the image processing apparatus comprising:

• a buffer module, comprising at least a line buffer for buffering pixel data of the input image;
• a scaling unit, coupled to the buffer module, comprising a plurality of filters having different filter tap numbers, wherein the scaling unit utilizes a target filter having a specific filter tap number selected from the plurality of filters to scale the input image according to the pixel data retrieved from the at least a line buffer;
• and
• a determining unit, coupled to the scaling unit, for receiving an image processing requirement and selecting the target filter having the specific filter tap number from the plurality of filters in the scaling unit according to the image processing requirement.

An image processing method for scaling an input image, the image processing method comprising:

• receiving an image processing requirement;
• setting a pixel precision of the input image according to the image processing requirement;
• buffering pixel data of the input image;
• and
• scaling the input image according to the pixel data.

An image processing method for scaling an input image, the image processing method comprising:

• receiving an image processing requirement;
• selecting a target filter having a specific filter tap number from a plurality of filters in a scaling unit according to the image processing requirement;
• buffering pixel data of the input image;
• and
• scaling the input image according to the pixel data.