Laser speckle contrast imaging system and laser speckle contrast imaging method thereof

A laser speckle contrast imaging method, for a laser speckle contrast imaging system, wherein the laser speckle contrast imaging system includes a laser light source, an image capturing module and an image processor, and the laser speckle contrast imaging method comprising:

• emitting, by the laser light source, a laser beam on a subject and respectively emitting, by a plurality of visible light sources, a visible light beam on the subject;
• obtaining, by the image capturing module, a first image corresponding to the laser beam emitting toward the subject and a plurality of second images corresponding to the plurality of visible light beams emitting toward the subject;
• and
• processing, by an image processor, the first image with a laser speckle stacking algorithm to determine a variation of a cortical spreading depression (CSD) waveform according to at least a speckle pattern determined in the first image.