Overlay the frame on the camera view, and then save and use the resulting photo (which was captured and the overlay frame)

Question

I would like to have a function in my application that

-let you take a picture of yourself or another who is famous, for example, "Wanted:" superimposed on it.

. Then the user will take a photo, and the overlay and photo will be combined into one

- The resulting image can be used in code.

Any ideas where and how to start with this. Any textbooks, etc.

Greetings

Answer 1

, , , , , :

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {

UIImage *img = [info objectForKey:UIImagePickerControllerOriginalImage];

// Here we are throwing away lots of image resolution -- but since our art is built for the 320 x 480 screen
// and we are worried about uploading bandwidth, crunching the image down from ~1600 x 2400 to 320 x 480 just makes sense
// note that the proportion is a little different, so the picture is slightly stretched in the y-axis, but this is augmented reality, so we like that

// note that hardwareScreenSize has to be determined by checking UIDeviceHardware

UIGraphicsBeginImageContext(hardwareScreenSize);


[img drawInRect:CGRectMake(0, ((hardwareScreenSize.height - hardwareScreenSize.height ) / 2), hardwareScreenSize.width, hardwareScreenSize.height)];


// this scales overlayImage to fit ontop of camera image
[(UIImage *)overlayImage drawInRect:CGRectMake(0, 0, hardwareScreenSize.width, hardwareScreenSize.height)];

UIImage *finalImage = UIGraphicsGetImageFromCurrentImageContext();
[finalImage retain];

UIGraphicsEndImageContext();