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I have an image with resolution 200 * 300. I scale the image to 600*900 using core graphics,as a result of which image starts pixelating. Is there any filter in ios or any other technique by which I can reduce the pixelation after I scale the image.
Use a good interpolator when resizing. That should be all that’s needed.
If you scale using
CGContextDrawImage, then you probably just need to addCGContextSetInterpolationQuality(gtx, kCGInterpolationHigh);before callingCGContextDrawImage. You may also want to tweak the context’s anti-aliasing parameters.