Image recording method and image recording apparatus

An image recording method (2) for recording a sequence of individual images of a scene (3), the method comprising:

• in a first control loop (6), setting an exposure parameter (8) in dependence on a respective brightness value (21) of an individual image,
• illuminating the scene (3) using an illumination device (4),
• in a second control loop (7), setting a maximum value (10) of a control range (9) of the exposure parameter (8) in the first control loop (6),
• effecting the setting of the maximum value (10) in dependence on an exposure variable (11),
• wherein the maximum value (10) of the control range (9) of the exposure parameter (8) remains constant for a constant exposure variable (11), and
• the maximum value (10) of the control range (9) of the exposure parameter (8) remains constant for an increase in a distance of an image recording apparatus (1) from the scene (3).

An image recording apparatus (1) for recording a sequence of individual images of a scene (3), the image recording apparatus (1) comprising:

• an illumination device (4) for illuminating the scene (3),
• a closed-loop control unit (5) that is configured for working through a first control loop (6) and a second control loop (7), in which the first control loop (6) is configured to set an exposure parameter (8) in dependence on a respective brightness value (21) of an individual image, and the second control loop (7) is configured to set a maximum value (10) of a control range (9) of the exposure parameter (8) in the first control loop (6) in dependence on an exposure variable (11),
• wherein the exposure variable (11) is a parameter that is directly or indirectly related to the light intensity (16) of the illumination device (4), and
• wherein the closed-loop control unit (5) is configured such that a setting of the exposure parameter (8) within the limits of the control range (9) in dependence on the respective brightness value (21) of the individual image is effected, and the brightness value (21) is an average value from a plurality of pixel values of an individual image.