Delta interpolation for upsampling imaging solutions

The advances in imaging optics, sensors, and camera processing capabilities in today´s digital cameras have resulted in photos with over 10 megapixels. The high resolution may pose a challenge to the computational complexity of many imaging solutions, such as color enhancement. To reduce the complexity of these imaging solutions and enable real time operations, it has been proposed to employ an upsampling imaging solution approach, such as the celebrated joint bilateral upsampling algorithm. In this paper we present a delta interpolation scheme, which reconstructs a high resolution solution by explicitly employing knowledge from both the high and low resolution images and operating on a delta image. This method achieves substantially enhanced visual quality on color enhancement, and its performance is validated by experimental results.