Handwriting systems and operation methods thereof

An operation method of a handwriting system, the handwriting system comprising a light source module and an image sensing apparatus, the light source module being configured to provide a light source to illuminate an object on a plane, the image sensing apparatus being disposed on the plane and configured to capture an image of the object reflecting lights emitted by the light source, the operation method comprising:

• obtaining the image captured by image sensing apparatus;
• analyzing a shape of at least one light spot in the captured image;
• dividing a merged light spot into two individual light spots at a position when the merged light spot having a width shorter than a threshold at the position is located;
• determining whether each of the two individual light spots has image characteristics conforming to a shape of the object;
• and
• screening out at least one light spot not conforming to the shape of the object according to an aspect ratio of the at least one light spot in the captured image.

A handwriting system, comprising:

• a light source module configured to provide a light source to illuminate an object on a plane;
• an image sensing apparatus disposed on the plane and configured to capture an image of the object reflecting lights emitted by the light source;
• and
• a processing circuit electrically connected to the image sensing apparatus and configured to receive the image captured by the image sensing apparatus, analyze a shape of at least one light spot in the captured image, and screen out at least one light spot not conforming to the shape of the object according to a size of the at least one light spot in the captured image on y-axis or on x-axis,
• wherein when a merged light spot having a width shorter than a threshold at a position is located, the processing circuit is configured to divide the merged light spot into two individual light spots at the position, and determine whether each of the two individual light spots has image characteristics conforming to the shape of the object.

An operation method of a handwriting system, the handwriting system comprising a light source module and an image sensing apparatus, the light source module being configured to provide a light source to illuminate an object on a plane, the image sensing apparatus being disposed on the plane and configured to capture an image of the object reflecting lights emitted by the light source, the operation method comprising:

• obtaining the image captured by image sensing apparatus;
• analyzing a shape of at least one light spot in the captured image;
• dividing a merged light spot into two individual light spots at a position when the merged light spot having a width shorter than a threshold at the position is located;
• determining whether each of the two individual light spots has image characteristics conforming to a shape of the object;
• and
• screening out at least one light spot not conforming to the shape of the object according to a size of the at least one light spot in the captured image on y-axis or on x-axis.