Is possible to resize the image after taking picture from ios device?

Question

Possible Duplicate:
The simplest way to resize an UIImage?

I am using camera of ipod device to capture image and after taking image i want to resize it as per user need in my application . But by enabling editing : true in camera code , it shows the image in rectangle format of the image's middle section only.Thanks in advance for help.Note that I want image croapping here. it means image accutaly resize according to croaped image.

You have to import two classes that is UIImage Resize.h and .m file.....these files are very helpful to resize the picture — Sudha Tiwari, Dec 28 '12 at 07:24
Ok. But can you tell me in details for adding these files. I mean what framework or files i have to import for that. Thanks for your quick responce. — Arun, Dec 28 '12 at 07:29
You can also try this link may be it will help you..... http://stackoverflow.com/questions/2658738/the-simplest-way-to-resize-an-uiimage — Sudha Tiwari, Dec 28 '12 at 07:30
follow my answer for crop image http://stackoverflow.com/questions/13890299/uiimageview-setframe-not-working-in-uitableviewcell/13892709#13892709 — Rajneesh071, Dec 28 '12 at 07:43

score 1 · Accepted Answer · answered Dec 28 '12 at 07:31

this may help you

- (UIImage*)imageByScalingAndCroppingForSize:(CGSize)targetSize AndImage:(UIImage*)sourceImage
{
UIImage *newImage = nil;        
CGSize imageSize = sourceImage.size;
CGFloat width = imageSize.width;
CGFloat height = imageSize.height;
CGFloat targetWidth = targetSize.width;
CGFloat targetHeight = targetSize.height;
CGFloat scaleFactor = 0.0;
CGFloat scaledWidth = targetWidth;
CGFloat scaledHeight = targetHeight;
CGPoint thumbnailPoint = CGPointMake(0.0,0.0);

if (CGSizeEqualToSize(imageSize, targetSize) == NO) 
{
    CGFloat widthFactor = targetWidth / width;
    CGFloat heightFactor = targetHeight / height;

    if (widthFactor > heightFactor) 
        scaleFactor = widthFactor; // scale to fit height
    else
        scaleFactor = heightFactor; // scale to fit width.

    scaledWidth  = width * scaleFactor;
    scaledHeight = height * scaleFactor;

    // center the image
    if (widthFactor > heightFactor)
    {
        thumbnailPoint.y = (targetHeight - scaledHeight) * 0.5; 
    }
    else 
        if (widthFactor < heightFactor)
        {
            thumbnailPoint.x = (targetWidth - scaledWidth) * 0.5;
        }
}       

UIGraphicsBeginImageContext(targetSize); // this will crop

CGRect thumbnailRect = CGRectZero;
thumbnailRect.origin = thumbnailPoint;
thumbnailRect.size.width  = scaledWidth;
thumbnailRect.size.height = scaledHeight;

[sourceImage drawInRect:thumbnailRect];

newImage = UIGraphicsGetImageFromCurrentImageContext();
if(newImage == nil) 
NSLog(@"could not scale image");

//pop the context to get back to the default
UIGraphicsEndImageContext();
return newImage;
}

score 1 · Answer 2 · answered Dec 28 '12 at 07:32

Here you can do to resize image.

UIImage* resizedImage(UIImage *inImage, CGRect thumbRect)
{
CGImageRef          imageRef = [inImage CGImage];
CGImageAlphaInfo    alphaInfo = CGImageGetAlphaInfo(imageRef);

// There's a wierdness with kCGImageAlphaNone and CGBitmapContextCreate
// see Supported Pixel Formats in the Quartz 2D Programming Guide
// Creating a Bitmap Graphics Context section
// only RGB 8 bit images with alpha of kCGImageAlphaNoneSkipFirst, kCGImageAlphaNoneSkipLast, kCGImageAlphaPremultipliedFirst,
// and kCGImageAlphaPremultipliedLast, with a few other oddball image kinds are supported
// The images on input here are likely to be png or jpeg files
if (alphaInfo == kCGImageAlphaNone)
    alphaInfo = kCGImageAlphaNoneSkipLast;

// Build a bitmap context that's the size of the thumbRect
CGContextRef bitmap = CGBitmapContextCreate(
            NULL,
            thumbRect.size.width,       // width
            thumbRect.size.height,      // height
            CGImageGetBitsPerComponent(imageRef),   // really needs to always be 8
            4 * thumbRect.size.width,   // rowbytes
            CGImageGetColorSpace(imageRef),
            alphaInfo
    );

// Draw into the context, this scales the image
CGContextDrawImage(bitmap, thumbRect, imageRef);

// Get an image from the context and a UIImage
CGImageRef  ref = CGBitmapContextCreateImage(bitmap);
UIImage*    result = [UIImage imageWithCGImage:ref];

CGContextRelease(bitmap);   // ok if NULL
CGImageRelease(ref);

return result;

}

Hope, it'll help.

Is possible to resize the image after taking picture from ios device?

2 Answers2