To enhance the spatial arrangement accuracy of transition of the fringe part in the display image of an optical display system having a photosensitive recording medium.

The imaging apparatus 10 comprises an input 12 receiving a pixel signal representative of an input image, and a buffer 16 for storing received pixels. The imaging apparatus further comprises a processor 20 for processing the signal and directing a signal to an LED array bar 38 generating a latent image by exposing the areas of a photosensitive body selectively. The processor 20 controls exposure of the photosensitive body by varying exposure of a selected pixel based on the neighboring pixels. Input data of a digital image is scanned until specified conditions are reached and an altered exposure value is allotted to the input data based on the degree of proximity to the specified conditions.