Improvement of the image

It referred to as LF image in the text, the method of the spatial low pass filtered image, obtained from a video output of the video camera. Video camera comprises a sensor array, referred to as the raw image in the text, it is possible to produce a continuous video frames in the form of pixellated 2D image. The raw image each have a first and a predetermined number of pixel rows and a second predetermined number of pixel columns. The method includes the raw image or sensor image, in real time LF image (i.e., an image including only low spatial frequency components of the 2D image) the step of generating. The method scans the sensor array line by line, it referred to as LF values ​​in the text, the value of each pixel in the above LF image, and obtaining the following method. That, LF value of a pixel, at least, all the rows that have already been scanned with the current line, already dependent on any scanned pixels. However, below the current line and not on the bottom line pixels from pixel row which is a third predetermined number of rows. The third predetermined number, the first significantly smaller than a predetermined number, for example, a first predetermined number of 1/5 smaller.