Patent ID: 11880965
Assignee: INDUSTRY-ACADEMIC COOPERATION FOUNDATION, YONSEI UNIVERSITY
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 0:
1. A method for obtaining a Fourier ptychography image using a smartphone, in which a Fourier ptychography image of a sample is obtained by controlling the smartphone through an application installed on the smartphone, the method comprising the steps of:
(a) sequentially providing illumination of different angles to the sample by sequentially displaying each of point light sources, according to a first pattern composed of the point light sources at different positions, wherein the point light sources of the first pattern are formed using a display of the smartphone;
(b) obtaining an image for each illumination angle of the sample using a camera of the smartphone whenever illumination of different angles is provided by the point light sources of the first pattern;
(c) restoring a first Fourier ptychography image using a plurality of images for each illumination angle obtained using the camera of the smartphone;
(d) repeating the steps (a) to (c) for a second pattern of point light sources to an Nth pattern of point light sources, wherein the first pattern to the Nth pattern are different from each other in sizes of point light sources distributed around a first point light source which is the nearest point light source to the sample, by adjusting sizes of point light sources of the second pattern to Nth pattern by using the display of the smartphone;
(e) evaluating quality of the first to Nth Fourier ptychography images restored for each pattern; and
(f) selecting a Fourier ptychography image of the best quality among the first to Nth Fourier ptychography images,
wherein the point light sources of the first pattern include the first point light source displayed vertically aligned with the sample, and a plurality of point light sources are distributed in the first pattern around the first point light source,
wherein the sizes of the plurality of point light sources distributed around the first point light source for each of the first to Nth pattern, are set bigger than the size of the first point light source in proportion to a separation distance from the first point light source.