I have to detect all text zone of a newspaper basing on edges automatically (new ideas are welcome).
The result that i need is many TXT file containing each one an article.
Take a look to this demonstration.
This question is way too broad.
If you want a proper answer then you need to ask very specific questions and show us what you have tried. We don't even know what formats you have to work with so we cannot offer any real help other than guessing.
Having said that:
You probably want to look into using image recognition software.
A good API to look into is OpenCV: http://opencv.org/
Here is a tutorial on how to use OpenCV with Java: http://docs.opencv.org/3.0-last-rst/doc/tutorials/introduction/desktop_java/java_dev_intro.html
And here are two similar questions that may help you:
Finding location of rectangles in an image with OpenCV
How to recognize rectangles in this image?
Related
I have used Java language for beginners is used with object type calling so there's an app or software called processing that I used that's a bit easy at making programs... (https://processing.org/)
What could be the best shortest example to make a animated GIF using shapes/ images?
What way could be the best way to make a GIF animated in regular Java without using processing software?
What could be the easiest examples for a beginner to do an animated GIF?
Stack Overflow isn't really designed for general "how do I do this" type questions. It's for specific "I tried X, expected Y, but got Z instead" type questions. But I'll try to help in a general sense:
You need to break your problem down into smaller steps and then take those steps on one at a time. Can you create a simple animation? Something simple like a circle moving around the screen. Separately from that, can you export a single .png image from a sketch? Again, just something simple. Work your way forward in small steps: can you then export each frame of a simple animation as a .png file?
Then when you have those .png files, you can use something like Image Magick to convert them into an animated gif file.
The Processing reference is your best friend for questions like this. The save() and saveFrame() functions could come in handy for exporting an animation as a gif.
Please try something, and if you get stuck, post a MCVE along with a more specific technical question in a new post. Good luck.
My aim is to let the user take a selfie from my app and then apply different image processing algorithms to convert it in a cartoon type image. I followed the algo written here, and then also used the method written just below the chosen answer to convert black and white sketch to colored image that should look like cartoon. Every thing is ok except that after applying Gaussian Blur , the image becomes too hazy and unclear. Here is the image output:
Any advice how I can make it more clear? Like shown in this link. I know they used Photoshop , but I want to achieve it with Java and Android.
PS: I found all the image processing methods from here. Plus the method mentioned here (the one below the chosen answer), what could be the ideal values in the arguments?
cartoonifying image
If you have a basic knowledge of C++, you can port this app for your need.
This application works real time. If you want to non-real time,than you can use bilateral filter against two medianBlurs at the bottom of function. That will give better results, but bad performance. But you need to use OpenCV in your application. If you want to make application with more functions, I will suggest you to do it.
I built a simple OCR to detect text. I now need to identify and segment the text from the source image. I used the Canny edge detector to get something like this.
http://i.imgur.com/at4YTb2.png
Sorry, I don't have enough reputation to post images.
I can't figure out a way to separate the text part. I have read,
http://www.math.tau.ac.il/~turkel/imagepapers/text_detection.pdf which is using the Stroke Width Transform
ROBUST TEXT DETECTION IN NATURAL IMAGES WITH EDGE-ENHANCED MAXIMALLY STABLE EXTREMAL REGIONS
The algorithms described are probably the best answers but are very difficult to implement in Java. Moreover, in my use cases the text would be prominent much like above. The above algorithms seem like overkill. I would be grateful if anyone can suggest any alternative to solve this problem. Thanks!
I am trying to check if an image is on a program's interface. I know how to grab the program's image but I cannot figure out a way to check if the image on on the program's screen. How can I do this?
I think checking containing one image in another is a question of "computer vision", so maybe some special libraries like OpenCV can helps you.
And this question on stackoverflow could be so useful too
OpenCV Template Matching example in Android
If you want to do the checking within the same program as the one that loads the image, it should be possible by checking the user interface control properties/attributes, and also the return values of the functions/methods used to set the image. In such a situation, Computer Vision is overkill. In this case, may be you can post some of the code used for loading the image, so that others can suggest solutions.
But if you are using a different program to capture the screen and look for the image, SIFT and SURF features of OpenCV should do the job. The accuracy won't be bad in this application.
I'm doing a project to implement virtual chemistry laboratory system. I tried to do this by using java2D. I have come across a big issue here. that is how to show some kind of filling effect to a beaker or to a flask (beaker is an image). I tried out this with setPixel() method in WritableRaster(java.awt.image) class. but it is not much useful.
I need a help to show something filling to a beaker and to show color change when mixing two chemicals. please remember that beaker is an image. thanks in advance if anyone can give me a solution with sample code.
Conveniently, many classes implement the Shape interface. Implementing classes work well with fill(), as shown here. To display color transitions, consider AlphaComposite, shown here.
I'd advise using a dynamic SVG canvas using Batik, and then you can use advanced high-level features like masks and blending and such. It's not the most efficient solution, but who cares? It's flexible for the future. Also, it'd take a lot of optimisation to work out what parts of the image have actually changed and pass that through for efficiency. I expect Batik does that as standard. Also, you'll have something that looks really very nice.
Anyway, then you just need to use Inkscape to create the SVG, and then modify the DOM (Document Object Model) accordingly. It's just like messing with HTML. Here is some SVG beaker clipart.