Thai company, SingMai Electronics, has released the PT10 histogram equalisation IP core, suitable for both SD and HD video sources. The IP core is suitable for implementation in both FPGAs and ASICs.
Histogram equalisation is a useful technique for expanding the contrast range of low-contrast images allowing greater detail to be perceived. The algorithm is designed for use in extreme lighting conditions, such as those found in security imaging where lighting cannot be controlled. It may also be used to pre-condition images for further processing such as feature extraction.
PT10 calculates the histogram of the image intensities in real time and applies the correction to the following video frame, calculating the correction during the vertical blanking interval.
