Studies comparing the different technologies and conventional film are ongoing. This Update concentrates on direct systems for intraoral radiography. Image Enhancement Features Digital radiographs have some advantages over conventional radiographs. Most systems have a zoom feature to increase the size of the image. They have a measuring feature to evaluate distances.
Most systems allow the image to be inverted from negative to positive and vice versa.
Images can be colorized. Thresholding is a similar process. Changing the shade of each pixel a set amount can change the density of the image. Adding 5 to the value of each pixel will lighten the image while subtracting 5 will darken it. The contrast can be improved by multiplying the pixel shade by a set amount.