22. You’ll read a computer artist giving a talk about pictures of missing people. For questions 1-10, complete the notes which summarise the information.

Missing people are often found after someone (1) ………

Photographs of children are not reliable because (2) ………

A computer artist needs a clear photo of (3) … and of (4) ……

From the photos the computer artist identifies (5) ………

The child's face appears (6) ………

Family likenesses are not so easily seen in (7) ………

The face is aged on the screen according to (8) ………

The computer can produce a picture of the (9) ………

Sometimes success is prevented due to the child's (10) ………

Speaker: One of the most difficult jobs for the police is looking for people. Once they have followed up all the information they have, there is really only one thing left. Pictures. By showing pictures to the public, they hope that someone will report the missing person. Now, people can go missing for years and then be found, often as a result of someone seeing their picture somewhere. But in the case of missing children things are very different. You see, parents almost always have recent photographs of their child. But children age... and a picture of a two-year-old is not much use when the child is still missing years later. But now there is a process of producing images of children as they would probably look years after they have gone missing. This is how it works.

Computer artists receive a photograph which clearly shows the features of the child, taken as recently as possible before he or she disappeared. Photographs are also needed of the rest of the family - the parents, and any brothers or sisters. The computer artists then examine the photographs looking for family likenesses -features such as eyes, nose, bone structures, charac­teristics which are inherited. They put the child's photograph into a computer, and it prints it onto the screen. The screen is divided into grids or squares, so that they can focus on small parts of the picture. They then change the picture - stretch it, enlarge and move tiny parts in the same way that the child's face ages as the child grows.

The next thing is to add those special characteristics that were found in the other photographs of the family. As you've probably seen, it's difficult to see a family likeness in a baby, but much easier in an older child - or, of course, an adult. All these develop­ments happen naturally as the child grows. The computer can perform the same process on the screen and produce an accurate picture of the older child. The picture is shown in public places, in newspapers, or on television.

It is a reliable process and there are more successes every year. Something that does make things more difficult is the way the child might be wearing his or her hair. Styles make such a difference to a face -and a very short style, for example, can make a child much more difficult to recognise. But for the most part, children found through this process look remarkably similar to their computer image.