Search found 10 matches

by tomcontr
2014-12-25T16:26:38-07:00
Forum: Developers
Topic: iOS Black and White Image and C API
Replies: 17
Views: 17686

Re: iOS Black and White Image and C API

The one on the last post? or the original one?
by tomcontr
2014-12-24T14:38:55-07:00
Forum: Developers
Topic: iOS Black and White Image and C API
Replies: 17
Views: 17686

Re: iOS Black and White Image and C API

There is a tiny difference, but I think RGB serves more the purpose because it gives me a more define image.

Here is the comparison:

Image

Thanks a lot for your help!

regards and merry Christmas!
by tomcontr
2014-12-24T08:56:55-07:00
Forum: Developers
Topic: iOS Black and White Image and C API
Replies: 17
Views: 17686

Re: iOS Black and White Image and C API

Never mind, found the error. Here is the final code: char *argv[] = {"convert","-respect-parenthesis","\(", input, "-set", "-colorspace", "RGB", "-colorspace", "gray", "-type", "grayscale","-colo...
by tomcontr
2014-12-24T08:26:46-07:00
Forum: Developers
Topic: iOS Black and White Image and C API
Replies: 17
Views: 17686

Re: iOS Black and White Image and C API

Ok, I`ve made some progress. I was able to use for the first time the "ConvertImageCommand()" with the API,which I thnk would make things easier. This code works fine: char *argv[] = {"convert", input, "-colorspace", "gray", "-type", "grayscale&...
by tomcontr
2014-12-23T06:10:20-07:00
Forum: Developers
Topic: iOS Black and White Image and C API
Replies: 17
Views: 17686

Re: iOS Black and White Image and C API

Some times the edges are black (or shadows) but they are not even on each one of them and that causes the OCR engine to read them as something. What I would like to do is to gently remove them trying to keep what it is in the middle. For example in the image that I uploaded the white borders would b...
by tomcontr
2014-12-22T21:55:11-07:00
Forum: Developers
Topic: iOS Black and White Image and C API
Replies: 17
Views: 17686

Re: iOS Black and White Image and C API

sorry for my ignorance, but same thing for the edges?

Regards!
by tomcontr
2014-12-22T21:25:35-07:00
Forum: Developers
Topic: iOS Black and White Image and C API
Replies: 17
Views: 17686

Re: iOS Black and White Image and C API

It worked!! this is the code: MagickLevelImage(wand,0.0,0.25,MaxRGB); MagickNegateImage(wand,false); MagickAdaptiveThresholdImage(wand,30,30,10); MagickNegateImage(wand,false); Im almos there. Now I need to do two more things. 1. clear the image a little bit more. For example remove black edges, and...
by tomcontr
2014-12-22T18:45:32-07:00
Forum: Developers
Topic: iOS Black and White Image and C API
Replies: 17
Views: 17686

Re: iOS Black and White Image and C API

Ok, so after diggin around I came up with the code below. The input image and output image are at the bottom: My goal is to clean the image and have a clean monochrome image which black font and white background. Hope thant you could give me some pointers, regards! -(UIImage *)drawMonochromeImage:(U...
by tomcontr
2014-12-22T07:55:06-07:00
Forum: Developers
Topic: iOS Black and White Image and C API
Replies: 17
Views: 17686

Re: iOS Black and White Image and C API

Thanks!

This is what I´ve found.

Code: Select all

 MagickBooleanType MagickAdaptiveThresholdImage(MagickWand *wand,
    const size_t width,const size_t height,const ssize_t offset)
I will try it and see what comes out.

Regards!
by tomcontr
2014-12-21T21:41:37-07:00
Forum: Developers
Topic: iOS Black and White Image and C API
Replies: 17
Views: 17686

iOS Black and White Image and C API

Hi guys, I'm trying to create a code that allows me to clear images to be read by and OCR engine. So far I haven't been able to accomplish much. Only install Imagemagink on my iOS project and use some of the API functions to create a Gray Scale image. What I'm trying to achieve is something like thi...