How to split an image in multipe parts for image processing, then recomine?
1
I am using Core Image and GPUImage to make some filters in an iPhone app. I seem to be running out of memory and crashing with larger images. I think this can be solved if I can split the input image into multiple parts.
How to efficiently split an image in multiple parts for image processing, then recombine to output the resulting image as a whole in iOS?
ios iphone xcode image-processing partitioning
edited Dec 18 '15 at 23:43
Brian Tompsett - 汤莱恩
4,2321338102
asked Nov 2 '12 at 10:49
MrwolfyMrwolfy
2,592134987
add a comment |
1
I am using Core Image and GPUImage to make some filters in an iPhone app. I seem to be running out of memory and crashing with larger images. I think this can be solved if I can split the input image into multiple parts.
How to efficiently split an image in multiple parts for image processing, then recombine to output the resulting image as a whole in iOS?
ios iphone xcode image-processing partitioning
edited Dec 18 '15 at 23:43
Brian Tompsett - 汤莱恩
4,2321338102
asked Nov 2 '12 at 10:49
MrwolfyMrwolfy
2,592134987
Out of curiosity, have you tried with the latest code I've committed to the repository? I made some improvements to the memory usage within the framework that might help avoid crashes when working with large images. There's still more to be done, but this might help.
– Brad Larson♦
Nov 2 '12 at 21:02
No, I'll try it. Thanks Brad!!
– Mrwolfy
Nov 3 '12 at 2:15
add a comment |
1
1
1
1
I am using Core Image and GPUImage to make some filters in an iPhone app. I seem to be running out of memory and crashing with larger images. I think this can be solved if I can split the input image into multiple parts.
How to efficiently split an image in multiple parts for image processing, then recombine to output the resulting image as a whole in iOS?
ios iphone xcode image-processing partitioning
edited Dec 18 '15 at 23:43
Brian Tompsett - 汤莱恩
4,2321338102
asked Nov 2 '12 at 10:49
MrwolfyMrwolfy
2,592134987
I am using Core Image and GPUImage to make some filters in an iPhone app. I seem to be running out of memory and crashing with larger images. I think this can be solved if I can split the input image into multiple parts.
How to efficiently split an image in multiple parts for image processing, then recombine to output the resulting image as a whole in iOS?
ios iphone xcode image-processing partitioning
ios iphone xcode image-processing partitioning
edited Dec 18 '15 at 23:43
Brian Tompsett - 汤莱恩
4,2321338102
asked Nov 2 '12 at 10:49
MrwolfyMrwolfy
2,592134987
edited Dec 18 '15 at 23:43
Brian Tompsett - 汤莱恩
4,2321338102
asked Nov 2 '12 at 10:49
MrwolfyMrwolfy
2,592134987
edited Dec 18 '15 at 23:43
Brian Tompsett - 汤莱恩
4,2321338102
edited Dec 18 '15 at 23:43
Brian Tompsett - 汤莱恩
4,2321338102
edited Dec 18 '15 at 23:43
Brian Tompsett - 汤莱恩
4,2321338102
4,2321338102
asked Nov 2 '12 at 10:49
MrwolfyMrwolfy
2,592134987
asked Nov 2 '12 at 10:49
MrwolfyMrwolfy
2,592134987
asked Nov 2 '12 at 10:49
MrwolfyMrwolfy
2,592134987
2,592134987
Out of curiosity, have you tried with the latest code I've committed to the repository? I made some improvements to the memory usage within the framework that might help avoid crashes when working with large images. There's still more to be done, but this might help.
– Brad Larson♦
Nov 2 '12 at 21:02
No, I'll try it. Thanks Brad!!
– Mrwolfy
Nov 3 '12 at 2:15
add a comment |
Out of curiosity, have you tried with the latest code I've committed to the repository? I made some improvements to the memory usage within the framework that might help avoid crashes when working with large images. There's still more to be done, but this might help.
– Brad Larson♦
Nov 2 '12 at 21:02
No, I'll try it. Thanks Brad!!
– Mrwolfy
Nov 3 '12 at 2:15
Out of curiosity, have you tried with the latest code I've committed to the repository? I made some improvements to the memory usage within the framework that might help avoid crashes when working with large images. There's still more to be done, but this might help.
– Brad Larson♦
Nov 2 '12 at 21:02
Out of curiosity, have you tried with the latest code I've committed to the repository? I made some improvements to the memory usage within the framework that might help avoid crashes when working with large images. There's still more to be done, but this might help.
– Brad Larson♦
Nov 2 '12 at 21:02
No, I'll try it. Thanks Brad!!
– Mrwolfy
Nov 3 '12 at 2:15
No, I'll try it. Thanks Brad!!
– Mrwolfy
Nov 3 '12 at 2:15
add a comment |
1 Answer
1
active
oldest
votes
0
-(void)getMultipleImages:(UIImage*)image AndNumberOfPart:(NSInteger)matrixSize{
CGSize size = image.size;
//for storing rect values of puzzle boxess
NSMutableArray *puzzleRectArr = [[NSMutableArray alloc]init];
NSMutableArray *puzzleCroppedObj = [[NSMutableArray alloc]init];
int widthD = size.width;
int heightD = size.height;
float boxWidth = widthD/matrixSize;
float boxHeight = heightD/matrixSize;
for (int i = 0; i < matrixSize*matrixSize; i++) {
int x = (widthD/matrixSize)/2 + (widthD/matrixSize) *(i%matrixSize)-boxWidth/2;
int y = (heightD/matrixSize)/2 + (heightD/matrixSize)* (i/matrixSize)-boxHeight/2;
CGRect rect = CGRectMake(x, y, boxWidth, boxHeight);
[puzzleRectArr addObject:[NSValue valueWithCGRect:rect]];
CGImageRef imageRef = CGImageCreateWithImageInRect([self.imgActual CGImage], rect);
UIImage *croppedImage = [UIImage imageWithCGImage:imageRef];
//----------------------------------------------------------------------
//here You can find the part image
[puzzleCroppedObj addObject:croppedImage];
//----------------------------------------------------------------------
CGImageRelease(imageRef);
}
}
answered Nov 2 '12 at 11:04
SachinVsSachinSachinVsSachin
5,02112735
add a comment |
Your Answer
StackExchange.ifUsing("editor", function () {
StackExchange.using("externalEditor", function () {
StackExchange.using("snippets", function () {
StackExchange.snippets.init();
});
});
}, "code-snippets");
StackExchange.ready(function() {
var channelOptions = {
tags: "".split(" "),
id: "1"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
}
});
function createEditor() {
StackExchange.prepareEditor({
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: true,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: 10,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
},
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
});
}
});
draft saved
draft discarded
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f13193748%2fhow-to-split-an-image-in-multipe-parts-for-image-processing-then-recomine%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
0
-(void)getMultipleImages:(UIImage*)image AndNumberOfPart:(NSInteger)matrixSize{
CGSize size = image.size;
//for storing rect values of puzzle boxess
NSMutableArray *puzzleRectArr = [[NSMutableArray alloc]init];
NSMutableArray *puzzleCroppedObj = [[NSMutableArray alloc]init];
int widthD = size.width;
int heightD = size.height;
float boxWidth = widthD/matrixSize;
float boxHeight = heightD/matrixSize;
for (int i = 0; i < matrixSize*matrixSize; i++) {
int x = (widthD/matrixSize)/2 + (widthD/matrixSize) *(i%matrixSize)-boxWidth/2;
int y = (heightD/matrixSize)/2 + (heightD/matrixSize)* (i/matrixSize)-boxHeight/2;
CGRect rect = CGRectMake(x, y, boxWidth, boxHeight);
[puzzleRectArr addObject:[NSValue valueWithCGRect:rect]];
CGImageRef imageRef = CGImageCreateWithImageInRect([self.imgActual CGImage], rect);
UIImage *croppedImage = [UIImage imageWithCGImage:imageRef];
//----------------------------------------------------------------------
//here You can find the part image
[puzzleCroppedObj addObject:croppedImage];
//----------------------------------------------------------------------
CGImageRelease(imageRef);
}
}
answered Nov 2 '12 at 11:04
SachinVsSachinSachinVsSachin
5,02112735
add a comment |
0
-(void)getMultipleImages:(UIImage*)image AndNumberOfPart:(NSInteger)matrixSize{
CGSize size = image.size;
//for storing rect values of puzzle boxess
NSMutableArray *puzzleRectArr = [[NSMutableArray alloc]init];
NSMutableArray *puzzleCroppedObj = [[NSMutableArray alloc]init];
int widthD = size.width;
int heightD = size.height;
float boxWidth = widthD/matrixSize;
float boxHeight = heightD/matrixSize;
for (int i = 0; i < matrixSize*matrixSize; i++) {
int x = (widthD/matrixSize)/2 + (widthD/matrixSize) *(i%matrixSize)-boxWidth/2;
int y = (heightD/matrixSize)/2 + (heightD/matrixSize)* (i/matrixSize)-boxHeight/2;
CGRect rect = CGRectMake(x, y, boxWidth, boxHeight);
[puzzleRectArr addObject:[NSValue valueWithCGRect:rect]];
CGImageRef imageRef = CGImageCreateWithImageInRect([self.imgActual CGImage], rect);
UIImage *croppedImage = [UIImage imageWithCGImage:imageRef];
//----------------------------------------------------------------------
//here You can find the part image
[puzzleCroppedObj addObject:croppedImage];
//----------------------------------------------------------------------
CGImageRelease(imageRef);
}
}
answered Nov 2 '12 at 11:04
SachinVsSachinSachinVsSachin
5,02112735
add a comment |
0
0
0
-(void)getMultipleImages:(UIImage*)image AndNumberOfPart:(NSInteger)matrixSize{
CGSize size = image.size;
//for storing rect values of puzzle boxess
NSMutableArray *puzzleRectArr = [[NSMutableArray alloc]init];
NSMutableArray *puzzleCroppedObj = [[NSMutableArray alloc]init];
int widthD = size.width;
int heightD = size.height;
float boxWidth = widthD/matrixSize;
float boxHeight = heightD/matrixSize;
for (int i = 0; i < matrixSize*matrixSize; i++) {
int x = (widthD/matrixSize)/2 + (widthD/matrixSize) *(i%matrixSize)-boxWidth/2;
int y = (heightD/matrixSize)/2 + (heightD/matrixSize)* (i/matrixSize)-boxHeight/2;
CGRect rect = CGRectMake(x, y, boxWidth, boxHeight);
[puzzleRectArr addObject:[NSValue valueWithCGRect:rect]];
CGImageRef imageRef = CGImageCreateWithImageInRect([self.imgActual CGImage], rect);
UIImage *croppedImage = [UIImage imageWithCGImage:imageRef];
//----------------------------------------------------------------------
//here You can find the part image
[puzzleCroppedObj addObject:croppedImage];
//----------------------------------------------------------------------
CGImageRelease(imageRef);
}
}
answered Nov 2 '12 at 11:04
SachinVsSachinSachinVsSachin
5,02112735
-(void)getMultipleImages:(UIImage*)image AndNumberOfPart:(NSInteger)matrixSize{
CGSize size = image.size;
//for storing rect values of puzzle boxess
NSMutableArray *puzzleRectArr = [[NSMutableArray alloc]init];
NSMutableArray *puzzleCroppedObj = [[NSMutableArray alloc]init];
int widthD = size.width;
int heightD = size.height;
float boxWidth = widthD/matrixSize;
float boxHeight = heightD/matrixSize;
for (int i = 0; i < matrixSize*matrixSize; i++) {
int x = (widthD/matrixSize)/2 + (widthD/matrixSize) *(i%matrixSize)-boxWidth/2;
int y = (heightD/matrixSize)/2 + (heightD/matrixSize)* (i/matrixSize)-boxHeight/2;
CGRect rect = CGRectMake(x, y, boxWidth, boxHeight);
[puzzleRectArr addObject:[NSValue valueWithCGRect:rect]];
CGImageRef imageRef = CGImageCreateWithImageInRect([self.imgActual CGImage], rect);
UIImage *croppedImage = [UIImage imageWithCGImage:imageRef];
//----------------------------------------------------------------------
//here You can find the part image
[puzzleCroppedObj addObject:croppedImage];
//----------------------------------------------------------------------
CGImageRelease(imageRef);
}
}
answered Nov 2 '12 at 11:04
SachinVsSachinSachinVsSachin
5,02112735
edited Nov 21 '18 at 10:11
answered Nov 2 '12 at 11:04
SachinVsSachinSachinVsSachin
5,02112735
answered Nov 2 '12 at 11:04
SachinVsSachinSachinVsSachin
5,02112735
answered Nov 2 '12 at 11:04
SachinVsSachinSachinVsSachin
5,02112735
5,02112735
add a comment |
add a comment |
draft saved
draft discarded
Thanks for contributing an answer to Stack Overflow!
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
draft saved
draft discarded
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f13193748%2fhow-to-split-an-image-in-multipe-parts-for-image-processing-then-recomine%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Out of curiosity, have you tried with the latest code I've committed to the repository? I made some improvements to the memory usage within the framework that might help avoid crashes when working with large images. There's still more to be done, but this might help.
– Brad Larson♦
Nov 2 '12 at 21:02
No, I'll try it. Thanks Brad!!
– Mrwolfy
Nov 3 '12 at 2:15