I am working on one module where I need to pick image from photo library and draw on view.but whenever I pick the large scale images it always return me 640 *480 scaled image and because of that small image is displayed.
I have made AllowEditing ON.
can anyone help me to find the resolution of original image,so that I can again scale it to original one.
iImagePicker.allowsImageEditing = YES;
- (void)imagePickerController:(UIImagePickerController *)picker
didFinishPickingImage:(UIImage *)image
editingInfo:(NSDictionary *)editingInfo
{
[[iImagePicker parentViewController] dismissModalViewControllerAnimated:YES];
iIsImageSaved = YES;
iSavedImage = [editingInfo objectForKey:#"UIImagePickerControllerOriginalImage"];;
int width,height;
width = iSavedImage.size.width;
height = iSavedImage.size.height;
iApp->ImagePicked(image);
}
Thanks,
Sagar
You don't need to scale your image back, it should be available anyway. Check my answer to this question (which is a duplicate I think..)
[Updated answer for your code]
You are using a deprecated method, try imagePickerController:didFinishPickingMediaWithInfo: with the UIImagePickerControllerOriginalImage key instead.
Added code snippet:
-(void) imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
UIImage* originalImage = [info objectForKey:UIImagePickerControllerOriginalImage];
NSLog(#"Original image width: %f and height: %f", originalImage.size.width, originalImage.size.height);
UIImage* editedImage = [info objectForKey:UIImagePickerControllerEditedImage];
NSLog(#"Edited image width: %f and height: %f", editedImage.size.width, editedImage.size.height);
[self dismissModalViewControllerAnimated:YES];
}
Related
I'm attempting to implement an iOS camera view that takes pictures that are square in shape (similar to Instagram). My code appears below. The first part, where the frame height is set to be equal to the frame width, is working as expected and the user is given a view that is square. The problem occurs later when I attempt to apply the frame (which is a CGRect property) to the image data using CGImageCreateWithImageInRect. I pass the frame rect to this method with the image. But the results are not cropped to be square. Instead the image retains the original default dimensions from the iOS camera. Can someone please tell me what I've done wrong? My understanding from the Apple documentation is that CGImageCreateWithImageInRect should select an image area of shape Rect from some starting x/y coordinate. But that doesn't seem to be happening.
//Set the frame size to be square shaped
UIView *view = imagePicker.view;
frame = view.frame;
frame.size.height = frame.size.width;
view.frame = frame;
//Crop the image to the frame dimensions using CGImageCreateWithImageInRect
-(void)imagePickerController:(UIImagePickerController *)picker
didFinishPickingMediaWithInfo:(NSDictionary *)info
{
[self.popoverController dismissPopoverAnimated:true];
NSString *mediaType = [info
objectForKey:UIImagePickerControllerMediaType];
[self dismissModalViewControllerAnimated:YES];
if ([mediaType isEqualToString:(NSString *)kUTTypeImage]) {
UIImage *image = [info
objectForKey:UIImagePickerControllerOriginalImage];
croppedImage = (__bridge UIImage *)(CGImageCreateWithImageInRect((__bridge CGImageRef)(image), frame));
imageView.image = croppedImage;
}
else if ([mediaType isEqualToString:(NSString *)kUTTypeMovie])
{
// Code here to support video if enabled
}
}
You are doing right. The only thing is that I think you are setting the frame property same as the picker view, so the final size is the same as the original size.
Try to set frame smaller than pickerView.view.frame, not equal
Check this out
Cropping an UIImage
You are setting the frame wrong.
I suggest you take a look at this sample code from Apple, on how to create what you are trying to:
https://developer.apple.com/library/mac/#samplecode/VirtualScanner/Listings/Sources_VirtualScanner_m.html#//apple_ref/doc/uid/DTS40011006-Sources_VirtualScanner_m-DontLinkElementID_9
Look at the:
- (ICAError)startScanningWithParams:(ICD_ScannerStartPB*)pb
function
I am trying to crop image by my custom cropper. Not from the UIImagePickerController's. Now for that I am showing the Image captured from Image Picker in a UIImgeView by handling UIImagePicker's delegate:
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingImage:(UIImage *)image editingInfo:(NSDictionary *)editingInfo {
imvOriginalImage.image = image;
}
For cropping I have to convert this Image to CGImageRef. The Image is captured in portrait mode. Now when I convert this image in CGImageRef image orientation get changed. Even if I use following:
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingImage:(UIImage *)image editingInfo:(NSDictionary *)editingInfo {
//imvOriginalImage.image = image;
CGImageRef imgRef = [image CGImage];
UIImage *img = [UIImage imageWithCGImage:imgRef];
[imvOriginalImage setImage:img];
}
Image Orientation get changed. This happens only for those Image which are captured in portrait mode. Landscape images not have this issue.
Why this is happening?
How to solve this?
Thanks In Advance.
This is that iPhone camera rotates the image comparing with Home button. It uses EXIF that is meta data of image. See this thread:
iPhone image rotation
I want to pick a photo from UIImagePickerController and check the photo if it is landscape. if selected photo is landscape, I want to rotate to portrait.
so, here is my code
- (void)imagePickerController:(UIImagePickerController *)picker
didFinishPickingImage:(UIImage *)image
editingInfo:(NSDictionary *)editingInfo {
if(image.imageOrientation == UIImageOrientationRight || image.imageOrientation == UIImageOrientationLeft){
UIImage *retatedImg = [image imageRotatedByDegrees:90];
}else {
UIImage *retatedImg = image;
}
}
I'm sure [imageRotatedByDegrees:] method is working fine. Just stuck why it does not recognize landscape photo. help me!
imageOrientation property doesn't refer to the format of the image. When you load an image, the value for that property depends of the EXIF data in the file, if any. If the camera that take the photo saves it with the final format, it will not include EXIF data for image orientation changes.
If you want to know if that image format is portrait or landscape, compare the width and height dimensions instead of using imageOrientation.
if( image.size.width > image.size.height )
UIImage *retatedImg = [image imageRotatedByDegrees:90] ;
Each time I use the camera to take a photograph, then save it the image is always in landscape. This means the UIImageView in my Xib is the wrong way around. Its Portrait - which is what I want and expected. I can correct this by rotating the image 90 degrees but even then I can't disable the animation which shows the original landscape photo followed by the animated rotation itself. How can I ensure the UIImageView from the camera is actually in portrait mode when saved and not landscape and, how can I disable the animation during the CGAffineTranformationMakeRotation ??
I found this post to be very helpful, it describes adding a category to UIImage to do the rotation of the image before you save it:
http://www.platinumball.net/blog/2009/03/30/iphone-uiimage-rotation-and-mirroring/
And then once the category is implemented, you would do something like this:
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
UIImage *originalImage, *editedImage, *rotatedImage;
editedImage = (UIImage *)[info objectForKey:UIImagePickerControllerEditedImage];
originalImage = (UIImage *)[info objectForKey:UIImagePickerControllerOriginalImage];
if (editedImage)
{
rotatedImage = [editedImage rotate:UIImageOrientationRight];
}
else
{
rotatedImage = [originalImage rotate:UIImageOrientationRight];
}
NSString *f = #"/set/this/to/your/file/name";
[UIImagePNGRepresentation(rotatedImage) writeToFile:f atomically:YES];
[[picker parentViewController] dismissModalViewControllerAnimated:YES];
[picker release];
}
I am working on an application where i am picking up images from iphone library using uiimagepicker control. I am using following code to pick up image.
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
NSLog(#"image picked:");
UIImage *image = [info objectForKey:#"UIImagePickerControllerOriginalImage"];
//UIImageWriteToSavedPhotosAlbum(image, self, nil, nil);
CGRect cropRect;
cropRect = [[info valueForKey:#"UIImagePickerControllerCropRect"] CGRectValue];
}
The above method works perfect when I capture an image from camera but when I pick an image from iphone library, the cropRect gives me incorrect values. It is always set to x = 43 or greater, even if I pick the rectangle from extreme left of the screen. So as a result I am getting a vertical black strip on left side of the image.
thanks in advance