Method and system for detecting flame

A method for detecting a flame, comprising steps of:

• (a) capturing a plurality of images;
• (b) determining whether a bright object exists in the plurality of images, wherein the step (b) comprises sub-steps of
• classifying at least a specific pixel having components of Y, U and V as a bright pixel if the components of Y, U and V respectively meet predefined intervals;
• and
• grouping and labeling the bright pixel(s) to form a bright object;
• (c) analyzing whether the bright object is in a spatially flickering state, wherein the spatially flickering state comprises a state being one selected from a group consisting of:
• the bright object having an upper edge in a flickering state;
• the bright object simultaneously having an upper edge in the flickering state and a lower edge in a non-flickering state;
• and
• the bright object having an upper edge and a lower edge both in a flickering state, and the upper edge having a moving direction different from that of the lower edge;
• and
• (d) determining the bright object as the flame if the bright object is in the spatially flickering state.