How to draw Circular Progress by image in iOS - ios

I'm facing a hard problem. I want to create a Circular progress by using image. You can see the follow image here : .
I don't know how to draw it. Could you please give me some advice for drawing. There is a library to do that? I searched on the internet, I found that all library using color, not use image. Please help me. Thanks so much.

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I have a binary image and I am trying to eliminate the projections on it.
I have been able to do the background removal as you can see in Figure 2.
See the black stem in the first figure? I want to remove that, so that my final image looks like the one in figure 3. Any insights for this problem would be appreciated. Please find this image on imgur, as I am not permitted to post images in my questions yet.
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How to make a rectangular clockwise progress in iOS?

I'm struggling to create a rectangular clockwise progress in iOS. See the attached images to understand better what I mean:
If anyone has some useful ideas, please share them. Thank you.
I have created a reactangular loader. You can have a look at the code here
https://github.com/NavneetSinghGill/ReactangularLoader.git
There's a method named getPointsForValue which does the main work.

How to give effects to image in iOS?

I want user to pick an image from gallery then user cab give multiple effects to the image like grey color,vintage,sepia,retro etc.I have searched a lot for the solution.Please guide how can i achieve this task?
Thanks in advance.
if you just simply wants apply the effects which you described you can use these
or you want to apply many different filters and also make new filters to apply on that images use GPUImage Framework
its very fast and easy..
Please try with this demo.
https://github.com/yackle/CLImageEditor
This is the better then anything.
Thanks
Use Core Image Framework by Apple. Cheers! This will help you

iOS custom image crop using paths

I need to implement a custom image crop on iOS and I can't seem to be able to find a technology that will allow me to do that easily. The goal is to have an interface as follows:
The idea is to have some sort of path or something around the face that the user can "nudge" around with their finger. Is there a library for this?
I have played a bit with UIBezierPaths, but I don't see how they can be edited after being stroked.
The best that I can come up with is having the user manually draw a line around the face, but then the line wouldn't be editable.
Please help! Does anyone know of a solution for this? I am in a bind and need to provide my client with a solution.

How to binaries image using ImageMagick?

I have got one image like this
to only black and white colored image.
And I come across this ImageMagick resource
Does this can be used to generate black and white image from the above given image?
Does it is good to use this one?
If it is good one then does there is any documentation or tutorial on "How to use?".
UPDATE
SO GOT THE BEST SOLUTION FROM #ale0xB's SUGGESTION.
No third party api is required for doing this as apple's COREIMAGE.FRAMEWORK is the best for doing what I want to do. It's filters are working like charm :)
Thanks for the suggestion :)
I use this image filter. And it is great in speed and provides great output :)
Why would you want to use imageMagick instead of the standard Core Image to produce black and White images? I haven't used it before, but I doubt it's gonna give a much better performance than the native framework when it's just about creating a filter.
Since iOS 6 you have it really easy, have a look: Core Image filters, specially to CIColorMonochrome, which is the one you may be interested in.
If you're playing with images in your app, this is definitely worth checking: Core Image Programming Guide

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