Editing an image?

[cowgod2007]

Hey guys!
So right now I'm making an app that takes the data of pixels (like rgb values) and I want to modify these values to smoothen out the image. I already have the getting the values done, now I just need to set them. How would I go about changing the rgb values on pixels in an image?

Thanks in advance!

[cowgod2007]

bump! can anyone help at all?

[cowgod2007]

So I found out how to create a totally new CGImage and then add the pixel data into that. This is what I have so far:

for (int index = 0; index < length; index += 4)  
	{  
		
		/*m_PixelBuf[index + 1] = 255 - m_PixelBuf[index + 1];  
		m_PixelBuf[index + 2] = 255 - m_PixelBuf[index + 2];  
		m_PixelBuf[index + 3] =    255 - m_PixelBuf[index + 3]; 
		*/
		
		m_PixelBuf[index + 1] = red2;  
		 m_PixelBuf[index + 2] = green2;  
		 m_PixelBuf[index + 3] = blue2;      
		 
		
		//NSLog(@"lol");
		
	}  
	
	//index+=4;
	ctx = CGBitmapContextCreate(m_PixelBuf,  
								CGImageGetWidth( inImage ),  
								CGImageGetHeight( inImage ),  
								CGImageGetBitsPerComponent(inImage),
								CGImageGetBytesPerRow( inImage ),  
								CGImageGetColorSpace( inImage ),  
								CGImageGetBitmapInfo(inImage) );	
	
	
	CGImageRef imageRef = CGBitmapContextCreateImage (ctx);  
	UIImage* rawImage = [UIImage imageWithCGImage:imageRef];  
	
	theimageView.image = rawImage;
	CGContextRelease(ctx);

The code keeps on crashing without giving me an error and I can't find out why. Is it due to formats? My red2, green2, and blue2 are all unsigned int's and my m_PixelBuf is a UInt8 pointer. Here is the code where I initialized everything:

	CGImageRef inImage = mycgImage;          
		CGContextRef ctx;  
		
		
		CFDataRef m_DataRef;  
		m_DataRef = CGDataProviderCopyData(CGImageGetDataProvider(inImage));  
		UInt8 *m_PixelBuf = (UInt8 *) CFDataGetBytePtr(m_DataRef);  
		//    Byte tmpByte;  
		int length = CFDataGetLength(m_DataRef);