<p><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif">The paper reviews achievements made in the field of video analytics and computer vision, which enable the automatic detection of fires, based on video data. Various algorithms have been implemented in sought for effective fire detection methods using video. As one of these, a colour-based fire detection algorithm is being described. However, using only one colour model for fire detection is an inefficient approach. The paper proposes a method for estimating temporal changes in pixel intensity, which is used to retrieve information about fires from fire-like objects in a video image. This method helps to calculate the average intensity value in a sequence of shots. A special software has been developed in the Python programming language using the OpenCV (Open Source Computer Vision Library) library, and the corresponding findings have been gained in view to demonstrate the effectiveness of the proposed method.</span></span></p>