Method, computer program and system for detecting changes and moving objects in a video view

An image processing device for framing changes and movements in a video image divided into N×N blocks of pixel positions, comprising

• at least one processor,
• an input/output circuitry adapted to receive the video image,
• at least one memory,
• the memory comprising instructions that, when executed by the at least one processor, cause the image processing device to:
• calculating a first bitmap representing a current time frame of the video image by a DCT transform on each of the N×N blocks of pixel positions by determining the extent of change in the respective N×N block by assigning a first one of a binary value to the pixel positions of the N×N blocks considered to have more than a predefined amount of change, and a second one of the binary value to the pixel positions of the N×N blocks considered to have less than a predefined amount of change,
• calculating a third bitmap representing the current time frame of the video image by performing an OR operation one a number of first bitmaps representing past time frames of the video image,
• calculating a fourth bitmap representing the current time frame of the video image by performing a dilation process of the third bitmap representing the current time frame of the video image,
• creating one or more frames identifying area of changes and movements in the video image based on detecting BLOBs (Binary Large Objects) in the fourth bitmaps.