A method of obtaining an image uses a broad dynamic range image sensor
that includes a photosensitive cell formed of pixels. Each pixel includes
a element, a first initialization transistor series connected to the
element, storage means coupled to the element, a third initialization
transistor series connected to a capacitor, and fourth and fifth series
connected transistors, wherein one control terminal of the fourth
transistor is connected to the capacitor. The method comprises
initializing the capacitor and t-he-photodiode to a first initialization
voltage via conduction of the second and third transistors, then making
the second transistor non-conductive to start a first long exposure
period of the photodiode. At the end of the first exposure period, the
first transistor is made conductive to initialize the photodiode to a
second initialization voltage to start a second short exposure period.
The photodiode voltage level is stored in the capacitor.