Gesture recognizing and controlling method and device thereof

A gesture recognizing and controlling method, comprising:

• capturing a pending image having depth information;
• analyzing the pending image by adopting a Blob detection thereby determining a number of connected area in the pending image;
• analyzing a first barycenter position of a first connected area and a second barycenter position of a second connected area in the pending image when the number of connected area is two;
• and
• outputting a controlling signal correspondingly according to a variation of a barycenters-connection length between the first barycenter position and the second barycenter position.

A gesture recognizing and controlling device, comprising:

• an image capturing unit capturing a pending image having depth information, wherein the pending image comprises a human form image;
• a storage unit storing the pending image and a computer readable and writable software;
• and
• a processing unit executing a plurality of commands of the computer readable and writable software, wherein the commands comprise:
• analyzing the human form image to obtain hand skeleton information having a first skeleton and a second skeleton;
• determining whether an intersection point is existing between the first skeleton and the second skeleton;
• determining whether an included angle formed by the first skeleton and the second skeleton is within a first predetermined angle range if the intersection point is exist;
• and
• outputting a controlling signal when the included angle is within the first predetermined angle range.