UIImage -> CGImageRef

Question

I'm building an Iphone app that needs to convert a UIImage to a CGImageRef. I have no idea how to do this and would love some help. I have no background in working with images... :)

score 110 · Accepted Answer · answered May 20 '11 at 03:59

110

It is as simple as image.CGImage where image is a UIImage object.

answered May 20 '11 at 03:59

Deepak Danduprolu

44,595
12
101
105

5

Do note that the CGImage may not be exactly equivalent to the UIImage. In particular, watch out for `imageOrientation` being other than `UIImageOrientationUp`. – Anomie May 20 '11 at 04:02
3

Be aware of `image` could also be created from `CIImage` – zc246 Sep 07 '16 at 08:53

Jason Coco · Answer 2 · 2015-06-12T21:36:00.423

16

CGImageRef cgImage = [someImage CGImage];

edited Jun 12 '15 at 21:36

answered May 20 '11 at 04:01

Jason Coco

77,985
20
184
180

11

Unless the UIImage was initialized from a CIImage, in that case, CGImage will be nil. – Alex Zavatone May 30 '14 at 20:46

score 3 · Answer 3 · edited Feb 08 '13 at 00:18

3

write folowing to get CGImage from UIImage: Suppose u have an UIImage object ex imageObject then,

CGImage imageRef = imageObject.CGImage

edited Feb 08 '13 at 00:18

Duck

34,902
47
248
470

answered Nov 30 '12 at 18:29

Satish Azad

2,302
1
16
35

UIImage -> CGImageRef

3 Answers3

Linked