UIImage选择器更改图像大小

Question

I have an application in which I am scanning text from a picture. I am using OCR. Now the problem is my source image size is 3024*3024. I have copied the image into iPhone 6 Simulator in Xcode. Now when I uploaded the image using uiimagepicker controller the image was resized to 748*748 and its quality is not same.

When I tried to increase image size the image's quality is not the same. What I need is image in its actual size and quality/resolution should not change.

Answer 1

try this code to resize image

- (UIImage*)imageWithImage:(UIImage*)img scaledToSize:(CGSize)newSize;{

UIGraphicsBeginImageContext( newSize );

[img drawInRect:CGRectMake(0,0,newSize.width,newSize.height)];

UIImage* newImg = UIGraphicsGetImageFromCurrentImageContext();

UIGraphicsEndImageContext();

return newImg;
}

and For the compression of images

NSData *dataForJPEGFile = UIImageJPEGRepresentation(theImage, 0.6);

Thanks

Answer 2

Did you set the qualityType property of your UIImagePickerController to UIImagePickerControllerQualityTypeHigh ? The default is medium.