Comments on: ImageMagick on iPhone – update with TIFF

By: Cloud

Cloud — Thu, 26 Aug 2010 21:54:35 +0000

Please look at the downloadable sample project to apply an effect to an image. As for different effects you should scan the API documented over at http://www.imagemagick.org/api/MagickWand/index.html

By: hardik rathore

hardik rathore — Mon, 23 Aug 2010 05:50:07 +0000

Hey
I was just playing around with image processing stuff

i need to implement the following functions :
Tint
Blur
Contrast
Brightness
GreyScale
Sharpness

I found many funtions in effects file

but problem is im getting no wat to call the function properly and get an result image to be shown in UIImageView.image

my C is intermediate so :D going through large chunk of header files is making me feel blue

please help :(

regards
Hardik

By: Bruce

Bruce — Tue, 11 Aug 2009 17:24:59 +0000

Hey, thanks for the good work.

I am trying to figure out how to use magickwand to create an animated gif from a sequence of images. I have been unable to find documentation on how to do this. Could you give me a nudge in the right direction?

By: Cloud

Cloud — Wed, 29 Jul 2009 12:35:24 +0000

If you just want to change the bpp of an image I guess you should use the MagickSetImageDepth() method of MagickWand.

In particular:
MagickSetImageDepth(MagickWand *wand, const unsigned long depth);

I tested it and before tiffinfo (use it to check your tiffs) reported:

Image Width: 320 Image Length: 460
Resolution: 72, 72 pixels/inch
Bits/Sample: 16

After using the above function:

Image Width: 320 Image Length: 460
Resolution: 72, 72 pixels/inch
Bits/Sample: 8

Let me know if this was what you were looking for. Also remember that for using images in Tesseract I think it’s better if they are grayscaled. Just a thought.

ciop ciop

By: sachin

sachin — Wed, 29 Jul 2009 04:55:38 +0000

I am using the image we get using UIPickerViewController which is one we get when we select from photo album and processing it like you said . The size of image is 320×320 and its 64bpp . how can i manipulate this using imagemagick to het a larger image say 640×640 and 1×1 pixel or 4×4 .
or is ther another workaround?