Patent ID: 11925449
Assignee: BEIJING HUARUI BOSHI MEDICAL IMAGING TECHNOLOGY CO., LTD.
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 2:
3. The method according to claim 1, wherein the determining, on the basis of the image matrix, the covariance matrix corresponding to the image matrix, further comprises:
calculating, on the basis of the image matrix, the covariance matrix corresponding to the image matrix by using a first predetermined computational equation, wherein the first predetermined computational equation is:

C=(I−Ī)·(I−Ī)T 

where C is the covariance matrix, I is the image matrix, T is a transpose of the matrix, Ī is a time-averaged matrix with a size of M*N, and each column in the time-averaged matrix is ā=1/NΣi=1Na(ti), where M is a number of pixels in each frame of the instantaneous differential images, N is a number of measurement times, and a(ti) is a vector corresponding to the instantaneous differential image at an i-th measurement time.