Method of utilizing wide-angle image capturing element and long-focus image capturing element for achieving clear and precise optical zooming mechanism

A method of utilizing a wide-angle image capturing element and a long-focus image capturing element to achieve clear and precise optical zooming when controlling an electronic device to simultaneously and respectively capture a wide-angle image and a long-focus image of a same spot comprising the steps of:

• reading the wide-angle image and the long-focus image, and performing exposure and white balance adjustment processes to the wide-angle image and the long-focus image respectively, so as to enable the exposure and the white balance of the wide-angle image and the long-focus image to be in consistency;
• performing an image matching algorithm to the wide-angle image and the long-focus image respectively, so as to enable each pixel on the long-focus image to match with each corresponding pixel on the wide-angle image;
• wherein the image matching algorithm calculates and obtains an image ratio between the long-focus image and the wide-angle image according to hardware parameters of the long-focus image capturing element and the wide-angle image capturing element, retrieves a region from the wide-angle image that corresponds to the long-focus image according to the image ratio, and then calculates and obtain dense optical flow field of an offset of each pixel on the long-focus image with respect to each corresponding pixel on the wide-angle image by using an optical flow estimation;
• and
• performing an image morphing fusion process to the corresponding pixels on the long-focus image and the wide-angle image, so as to generate a new wide-angle image;
• wherein the image morphing fusion process performs an offset deformation to the pixels on the long-focus image T(x+u, y+v) according to the dense optical flow fields of the offsets (u, v) of the pixels on the long-focus images T(x+u, y+v), so as to enable the pixels on the long-focus image T(x+u, y+v) to be deformed to match with the corresponding pixels on the wide-angle image W(x, y), and then perform a fusion process to the long-focus image T(x+u, y+v) and the wide-angle image W(x, y), in accordance with the following formula, so as to generate the new wide-angle image WNEW:
• WNEW=(1−λ)T(x+u,y+v)+λ*W(x,y)
• wherein λ is a weight factor and
• wherein, when pixels on a deformed long-focus image T(x+u, y+v) are clearer than the corresponding pixels on the wide-angle image W(x, y), taking λ=0, otherwise, taking 0<λ<1.0.