is it impossible to stop/cancel the OCRing?
On Monday, August 27, 2012 1:43:35 PM UTC+3, fulberto100 wrote:
>
> hi,
> im using tesseract on my iPhone app.
>
> i want to stop/cancel the ocr process. is there a way to do it?
> i wrote in backPressed method:
> tesseract->Clear();
> tesseract->End();
>
> but when the ocr starts and i hit the back button, it crashes, cos it is
> still OCRing.
>
> here is my iOS code:
>
> - (void)processOcrAt:(UIImage *)image
> {
> [self setTesseractImage:image];
>
> //char* utf8Text = tesseract->GetUTF8Text();
> //[self performSelector:@selector(ocrProcessingFinished:)
> withObject:[NSString stringWithUTF8String:utf8Text]];
> //dispatch_queue_t queue = dispatch_queue_create("com.awesome", 0);
>
> main = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0);
> dispatch_async(main, ^{
> tesseract->Recognize(NULL);
> char* utf8Text = tesseract->GetUTF8Text();
> [self performSelectorOnMainThread:@selector(ocrProcessingFinished:)
> withObject:[NSString
> stringWithUTF8String:utf8Text]
> waitUntilDone:NO];
> delete [] utf8Text;
> });
>
>
> }
>
> -(IBAction)backPressed:(id)sender{
> dispatch_release(main);
> tesseract->Clear();
> //tesseract->End();
>
> delete tesseract;
> tesseract = nil;
> delete pixels;
> [self.navigationController popViewControllerAnimated:YES];
> }
>
>
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