Digital image processing and systems incorporating the same

An image processing apparatus, comprising:

• a processing circuit for:
• receiving an image obtained using a mosaiced spectral filter having red, green, and blue filtered pixels,
• determining a direction of an edge feature in the image using only the color values in the received image that correspond to like-color filtered pixels,
• calculating a missing color value for at least one pixel location in the image using an interpolation equation that is selected based on the direction of the edge feature in the image, wherein the selected interpolation equation generates a plurality of product term multipliers, wherein said interpolation equation multiplies color values of neighboring pixels of the pixel location by the product term multipliers, and wherein the only product term multipliers are each an integral power of 2, and
• converting the received image into an output image including the missing color value for the at least one pixel location.