ImageMagick with iPhone
Posted: 2014-04-17T03:42:58-07:00
Hi
I have been trying to figure out how to convert jpg to tiff on an iPhone for 3 days.
The following command gives me the desired results.
I have tried the following code and it works for iOS 7.0.6 but not any other iOS versions. I am not even sure if the code below is correct. I have read pretty much all the threads related to iPhones on here but I still can't figure it out.
I have been trying to figure out how to convert jpg to tiff on an iPhone for 3 days.
The following command gives me the desired results.
Code: Select all
convert input.JPG -strip -density 200 -resize 1000x486\! -define tiff:rows-per-strip=1 -compress Group4 output.tifCode: Select all
-(UIImage *)convertImageToTiff
{
// Get image from bundle.
char *inputPath = strdup([self.inputImagePath UTF8String]);
char *outputPath = strdup([self.outputImagePath UTF8String]);
char *argv[] = {"convert", inputPath, "-strip", "-density", "200", "-resize", "1000x486\\!", "-define", "tiff:rows-per-strip=1", "-compress", "Group4", outputPath, NULL};
MagickCoreGenesis(*argv, MagickFalse);
MagickWand *magick_wand = NewMagickWand();
NSData * dataObject = UIImageJPEGRepresentation([UIImage imageWithContentsOfFile:self.inputImagePath], 1.0f);
MagickBooleanType status;
status = MagickReadImageBlob(magick_wand, [dataObject bytes], [dataObject length]);
if (status == MagickFalse) {
NSLog(@"Error %@", magick_wand);
}
ImageInfo *imageInfo = AcquireImageInfo();
ExceptionInfo *exceptionInfo = AcquireExceptionInfo();
int elements = 0;
while (argv[elements] != NULL)
{
elements++;
}
// ConvertImageCommand(ImageInfo *, int, char **, char **, MagickExceptionInfo *);
status = ConvertImageCommand(imageInfo, elements, argv, NULL, exceptionInfo);
if (exceptionInfo->severity != UndefinedException)
{
status=MagickTrue;
CatchException(exceptionInfo);
}
if (status == MagickFalse) {
fprintf(stderr, "Error in call");
ThrowWandException(magick_wand); // Always throws an exception here...
}
UIImage *convertedImage = [UIImage imageWithContentsOfFile:self.outputImagePath];
return convertedImage;
}