- (CGContextRef)createARGBBitmapContextWithImage:(UIImage*)image {

    // Get image width, height

    size_t pixelsWide = CGImageGetWidth(image.CGImage);

    size_t pixelsHigh = CGImageGetHeight(image.CGImage);

    // Declare the number of bytes per row

    NSIntegerbitmapBytesPerRow  = (pixelsWide *4);

    NSIntegerbitmapByteCount    = (bitmapBytesPerRow * pixelsHigh);

    // Use the generic RGB color space.

    CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();

    if(colorSpace ==NULL) {

        return NULL;

    }

    // Allocate memory for image data

    void*bitmapData =malloc( bitmapByteCount );

    if(bitmapData ==NULL) {

        CGColorSpaceRelease( colorSpace );

        return NULL;

    }

    // Create the bitmap context

    CGContextRef context = CGBitmapContextCreate (bitmapData,

                                                  pixelsWide,

                                                  pixelsHigh,

                                                  8,      // bits per component

                                                  bitmapBytesPerRow,

                                                  colorSpace,

                                                  kCGImageAlphaPremultipliedFirst);

    if(context ==NULL) {

        free(bitmapData);

    }

    // release colorspace before returning

    CGColorSpaceRelease( colorSpace );

    returncontext;

}

- (UIColor*)getPixelColorAtPoint:(CGPoint)point Image:(UIImage*)image

{

    UIColor* color =nil;

    CGImageRefinImage = image.CGImage;

    // Create bitmap context to draw the image into

    CGContextRef cgctx = [self createARGBBitmapContextWithImage:image];

    if(cgctx ==NULL) {

        returnnil;/* error */

    }

    size_t w = CGImageGetWidth(inImage);

    size_t h = CGImageGetHeight(inImage);

    CGRectrect = {{0,0},{w,h}};

    // Draw the image to the bitmap context

    CGContextDrawImage(cgctx, rect, inImage);

    // get image data

    unsignedchar* data =CGBitmapContextGetData(cgctx);

    if(data !=NULL) {

        //offset locates the pixel in the data from x,y.

        //4 for 4 bytes of data per pixel, w is width of one row of data.

        intoffset =4*((w*round(point.y))+round(point.x));

        intalpha =  data[offset];

        intred = data[offset+1];

        intgreen = data[offset+2];

        intblue = data[offset+3];

        //NSLog(@"offset: %i colors: RGB A %i %i %i  %i",offset,red,green,blue,alpha);

        color = [UIColorcolorWithRed:(red/255.0f)green:(green/255.0f)blue:(blue/255.0f)alpha:(alpha/255.0f)];

    }

    //release the context

    CGContextRelease(cgctx);

    // Free image data

    if(data) {

        free(data);

    }

    returncolor;

}