Image Recognition - cocoa

I want to write an application in cocoa that recognize an image, for example a square.
example: I take a photo and the application try to find a black square into it
Is there any library or reference to start with for cocoa?


This blog post on how the iPhone app "Sudoku Grab" works is pretty phenomenal, and should give you a clue as to where you should start. http://sudokugrab.blogspot.com/2009/07/how-does-it-all-work.html


You might start by getting a subscription to the journal, "Pattern Recognition and Image Analysis."


If what you are trying to achieve is the same sort of pattern recognition as required for 2D barcodes and 3D QR Codes, then you can also check the ZXing library over at http://code.google.com/p/zxing/


IQEngine is good api for image recognition for iphone and android.

Related

Image edit filter in xamarin forms

I am developing a project (kinda like CamScanner) where I take an image and on the fly crop it and edit it and save it to my device memory. I chose to do it in xamarin forms because of 1 source maintenance. I have managed to take the image using Xam.Plugin.Media and crop that image using ImageCropper.Forms plugins. Now, I cant seem to find any good plugins that can edit my image (Filters like Black and White, Magic Color, Grayscale). Can anyone guide me to choose which plugin is the best there is for the filter? I am focusing mainly on Android and iOS at the moment.
Thanks in advance

As of today, there is no plugin available to apply color filters for Xamarin.Forms. The closest thing would be using SkiaSharp Color Filters and define you own Color Matrices, which is not quite user friendly.

How to make a live camera with Microsoft.media.ocr with bounding box overlay so that user can touch and have text to speech in UWP?

I have implemented live camera and using Android text recognition and when I touch the bounding box overlay, text to speech works but in Universal windows, app cant get any documentation can anyone help how to implement in live camera OCR?

APIs from Windows.Media.Ocr namespace can extract text and text layout information from images. It’s designed to handle various types of images. For camera, you could capture images from the camera for recognition. You could get VideoFrame from camera and convert to image.
More details about how to implement OCR in UWP app please reference this sample. The scenario 2 provides how to capture image from camera and extract text.
More details about MediaCapture in UWP app please reference this tutorial.
For text to speech feature please try to reference this article and this sample.
If you want more additional features than Windows.Media.Ocr namespace, I recommend you to use Microsoft Cognitive Services. Check the Analyze video in near real-time section for more details.

Crop image from image with Libgdx

I'm developing an application for Android with Libgdx.
I would like to get the effect produced in the image by using two images.
Any suggestions? The guides that I found did not help to solve the problem.

This can just be achieved using the alpha channel of the image? Why do you need a second image? If you really need two images you could just use a shader to achieve it Link, a good tutorial to get started can be found here.

How to replicate code for Facebook image gestures?

I am developing an educational app that is made of multiple images. I am also new at coding and XCode. I wanted to know how to get my images so they respond to the gesture similar to the photos on facebook (swiping, min/max zooming, scrolling all on one image). I have the UIImage in UIScrollview.
Can I add all the gestures in UIScrollView or do I have to add each gesture separately? Because the app is made up of multiple png images do I have to connect each image separately or is there a method to implement one code for the entire program?
I am using Storyboard and have minimal coding.
If this information is already out there I would greatly appreciate some direction. I have tried to use "Basic Zooming Using the Pinch Gestures" from the iOS library with little success.

Check out this tutorial.
http://www.raywenderlich.com/6567/uigesturerecognizer-tutorial-in-ios-5-pinches-pans-and-more
In this they go over exactly what your wanting, zooming in and out images and swiping. Pretty much you use UIGestureRecognizers. :)

WP7 - Bing Maps - Convert map to png

I have the following questions:
There is an API for Bing Maps in WP7.
The question is there anything generating images from a data map. Something like a MapTiler. Too bad the MapTiler is for web. But I believe that is the same concept.
Given a map, returning the same in image format.
So, what do you say? Do you know any library that does this in WP7?

You're best bet is probably to load the map on screen and take a screen shot of it
RenderTargetBitmap in Windows Phone 7 SDK

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