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

Claim 4:
5. A smartphone for obtaining a Fourier ptychography image of a sample in combination with an optical system device, the smartphone comprising:
a display control module configured to sequentially provide 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;
an image acquisition module for obtaining an image for each illumination angle of the sample by using a camera of the smartphone whenever illumination of different angles is provided by the point light sources of the first pattern; and
a Fourier ptychography image restoration module for restoring a first Fourier ptychography image using a plurality of images for each illumination angle obtained using the camera,
wherein the point light sources of the first pattern include a 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 display control module controls the display for a second pattern of point light sources to an Nth pattern of point light sources, so that the first pattern to the Nth pattern are different from each other in sizes of point light sources distributed around the first point light source which is the nearest point light source to the sample,
wherein the image acquisition module obtains an image for each illumination angle with respect to the second pattern to the Nth pattern, and the Fourier ptychography image restoration module additionally restores second to Nth Fourier ptychography images with respect to the second pattern to the Nth pattern,
the smartphone further comprising:
an image quality evaluation module for evaluating image quality of the first to Nth Fourier ptychography images restored for each pattern; and
an image selection module for selecting a Fourier ptychography image of the best quality from among the first to Nth Fourier ptychography images,
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.