单项选择题
What are the steps of image extraction based on transform domain?
A．①multi-focus images are decomposed into separate layers by a multi-scale transform②coefficients are computed to integrate the decomposition into a composite fusion representation③the fused image is constructed by an inverse multi-scale transform.
B．①coefficients are computed to integrate the decomposition into a composite fusion②multi-focus images are decomposed into separate layers by a multi-scale transform③the fused image is constructed by an inverse multi-scale transform.
C．①coefficients are computed to integrate the decomposition into a composite fusion②the fused image is constructed by an inverse multi-scale transform.③multi-focus images are decomposed into separate layers by a multi-scale transform
D．①the fused image is constructed by an inverse multi-scale transform.②coefficients are computed to integrate the decomposition into a composite fusion③multi-focus images are decomposed into separate layers by a multi-scale transform
