【发布时间】：2015-04-20 02:12:09
【问题描述】：
我正在尝试采用此处的代码：
https://github.com/foundry/OpenCVStitch
进入我的程序。然而，我已经撞墙了。此代码将已经存在的图像拼接在一起。我正在尝试制作的程序会将用户拍摄的图像拼接在一起。我得到的错误是当我将图像传递给缝合函数时，它说它们的大小无效（0 x 0）。
这里是拼接功能：
- (IBAction)stitchImages:(UIButton *)sender {
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
NSArray* imageArray = [NSArray arrayWithObjects:
chosenImage, chosenImage2, nil];
UIImage* stitchedImage = [CVWrapper processWithArray:imageArray]; // error occurring within processWithArray function
dispatch_async(dispatch_get_main_queue(), ^{
NSLog (@"stitchedImage %@",stitchedImage);
UIImageView *imageView = [[UIImageView alloc] initWithImage:stitchedImage];
self.imageView = imageView;
[self.scrollView addSubview:imageView];
self.scrollView.backgroundColor = [UIColor blackColor];
self.scrollView.contentSize = self.imageView.bounds.size;
self.scrollView.maximumZoomScale = 4.0;
self.scrollView.minimumZoomScale = 0.5;
self.scrollView.contentOffset = CGPointMake(-(self.scrollView.bounds.size.width-self.imageView.bounds.size.width)/2, -(self.scrollView.bounds.size.height-self.imageView.bounds.size.height)/2);
[self.spinner stopAnimating];
});
});
}
chosenImage 和 selectedImage2 是用户使用这两个函数拍摄的图像：
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
savedImage = info[UIImagePickerControllerOriginalImage];
// display photo in the correct UIImageView
switch(image_location){
case 1:
chosenImage = info[UIImagePickerControllerOriginalImage];
self.imageView2.image = chosenImage;
image_location++;
break;
case 2:
chosenImage2 = info[UIImagePickerControllerOriginalImage];
self.imageView3.image = chosenImage2;
image_location--;
break;
}
// if user clicked "take photo", it should save photo
// if user clicked "select photo", it should not save photo
/*if (should_save){
UIImageWriteToSavedPhotosAlbum(chosenImage, nil, nil, nil);
}*/
[picker dismissViewControllerAnimated:YES completion:NULL];
}
- (IBAction)takePhoto:(UIButton *)sender {
UIImagePickerController *picker = [[UIImagePickerController alloc] init];
picker.delegate = self;
picker.allowsEditing = NO;
picker.sourceType = UIImagePickerControllerSourceTypeCamera;
//last_pressed = 1;
should_save = 1;
[self presentViewController:picker animated:YES completion:NULL];
}
stitchesImages 函数将这两个图像的数组传递给该函数：
+ (UIImage*) processWithArray:(NSArray*)imageArray
{
if ([imageArray count]==0){
NSLog (@"imageArray is empty");
return 0;
}
cv::vector<cv::Mat> matImages;
for (id image in imageArray) {
if ([image isKindOfClass: [UIImage class]]) {
cv::Mat matImage = [image CVMat3];
NSLog (@"matImage: %@",image);
matImages.push_back(matImage);
}
}
NSLog (@"stitching...");
cv::Mat stitchedMat = stitch (matImages); // error occurring within stitch function
UIImage* result = [UIImage imageWithCVMat:stitchedMat];
return result;
}
这是程序遇到问题的地方。当它传递本地保存在应用程序文件中的图像时，它工作正常。但是，当传递保存在变量（chosenImage 和 selectedImage2）中的图像时，它不起作用。
这是在 processWithArray 函数中调用并导致错误的缝合函数：
cv::Mat stitch (vector<Mat>& images)
{
imgs = images;
Mat pano;
Stitcher stitcher = Stitcher::createDefault(try_use_gpu);
Stitcher::Status status = stitcher.stitch(imgs, pano);
if (status != Stitcher::OK)
{
cout << "Can't stitch images, error code = " << int(status) << endl;
//return 0;
}
return pano;
}
错误是“无法拼接图像，错误代码 = 1”。
【问题讨论】：