Image processing circuit and method thereof

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

• inputting the input image to an image processing circuit;
• increasing a vertical resolution of the input image to generate a first enlarged image by utilizing a first scaling circuit of the image processing circuit;
• temporally storing the pixel values of a plurality of pixel rows of the first enlarged image into a plurality of line buffers;
• vertically sharpening the first enlarged image to generate a first sharpened image by utilizing a first sharpness circuit of the image processing circuit;
• increasing a horizontal resolution of the first sharpened image to generate a second enlarged image by utilizing a second scaling circuit of the image processing circuit;
• and
• horizontally sharpening the second enlarged image to generate a second sharpened image by utilizing a second sharpness circuit of the image processing circuit.

An image processing circuit for processing an input image, the image processing circuit comprising:

• a first scaling circuit, for increasing a first resolution of the input image along a first direction to generate a first enlarged image;
• a first sharpness circuit, coupled to the first scaling circuit, for vertically sharpening the first enlarged image to generate a first sharpened image;
• a second scaling circuit, coupled to the first sharpness circuit, for increasing a second resolution of the first sharpened image along a second direction to generate a second enlarged image;
• and
• a second sharpness circuit, coupled to the second scaling circuit, for horizontally sharpening the second enlarged image to generate a second sharpened image.

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

• inputting the input image into an image processing circuit;
• increasing a first resolution of the input image along a first direction to generate a first enlarged image by utilizing a first scaling circuit of the image processing circuit;
• vertically sharpening the first enlarged image to generate a first sharpened image by utilizing a first sharpness circuit of the image processing circuit;
• increasing a second resolution of the first sharpened image along a second direction to generate a second enlarged image by utilizing a second scaling circuit of the image processing circuit;
• and
• horizontally sharpening the second enlarged image to generate a second sharpened image by utilizing a second sharpness circuit of the image processing circuit.