iphone - image optimization reduce the loading time? -

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today messed uiimageview. tried add (15.5mb)sized image uiimageview. using uigraphicsbeginimagecontext added image(process bit slow because of large sized image).

after tried change brightness , contrast of image using thiscode

because of large image size, filters working bit :-<.

i worried loading time taken.

now have question, image optimisation reduces time taken process?? know reduce size of image. reduce time taken loading image uiimageview?

try one....

uiimage *originalimage = ...; cgsize destinationsize = ...; uigraphicsbeginimagecontext(destinationsize); [originalimage drawinrect:cgrectmake(0,0,destinationsize.width,destinationsize.height)]; uiimage *newimage = uigraphicsgetimagefromcurrentimagecontext(); uigraphicsendimagecontext();

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