Image sensing method

An image sensing method, applicable to anti-spoofing recognition of fingerprint recognition of the under screen of a display device, the display device having a display panel and an image sensor, the display panel having a display area, the image sensor correspondingly overlapping the display area;

• the image sensing method comprising the following steps:
• a dividing step:
• dividing the image sensor into a plurality of sensing blocks;
• a corresponding step:
• correspondingly dividing the display area into a plurality of display blocks according to a plurality of sensing blocks, the display block comprising at least one light-emitting block, the area of the light-emitting block being smaller than the area of the sensing block;
• a defining step:
• defining a luminous color of each display block and a color coordinate value of the luminous color;
• a reference sensing step:
• the plurality of display blocks emitting light at the same time, and then each of the sensing blocks sensing a reference image light intensity of the light reflected to the sensing blocks from each of the display blocks emitting light unto a reference object and reflected to the sensing blocks;
• a reference color calculation step:
• generating an anti-spoofing reference color information from the color coordinate value and the reference image light intensity;
• a registration step:
• registering the anti-spoofing reference color information into a system, and using the anti-spoofing reference color information to generate an anti-spoofing reference interval;
• a sensing step:
• the plurality of display blocks emitting light at the same time, and the sensing blocks obtaining an image light intensity of an image reflected to the sensing blocks from the display blocks emitting light unto and reflected by a test object;
• a calculation step:
• generating a color information from the color coordinate value and the image light intensity;
• and
• a comparison step:
• determining the color information and the anti-spoofing reference color information being consistent when the color information being within the anti-spoofing reference interval, otherwise determining the color information being inconsistent with the anti-spoofing reference color information.