The camera module image should be free of temporal instability (flicker) and spatial instability.

One factor of spatial instability is the peak to peak variation (jitter) of the geometric position of the image in the display: this should not exceed 0000 2 D, where D is the distance between the center of the monocular ellipse and the viewing distance. The center of the display.

Note: other factors that contribute to the stability of space images, such as vibration caused by vehicles, are not considered in this international standard.

For a display having only pixels with a continuous brightness distribution, jitter may be measured using a measuring microscope having a magnification of at least 20. The movement is determined by the visual alignment of the microscope cursor or comparator mask with the extreme position of the centroid, or the edge of the character or test object during observation.

For any display type, special display measuring equipment can be used. The device is used to scan one by one to determine the relative position of characters or test objects. If the device used determines the movement along the horizontal and vertical axes respectively, the range of jitter should be defined as the square root of the sum of the squares of the maximum horizontal and vertical differences.

The observation should last at least 4 seconds.