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Questions - emgucv

Thresholding an image gives fuzzy black output

Im preprocessing a qrcode to read it. I threshold the image, but sometimes I get a fuzzy black output, sometimes i get the proper binary image. Why is this happening? IM using C# and Emgucv. Here is m...
test-img

Stormbringer

c#

opencv

image-processing

emgucv

image-thresholding

Votes: 0

Answers: 1

Latest Answer

I tried with the qr code image you shared and works with every threshold value <200 (as it's the background value). Here's an example with 100 as threashold. Image<Gray,byte> qr = new Image&...
test-img

erik7854

EmguCV: What is the right variable to use for detector descriptors? Error:&quot;OpenCV: &gt; type=0&quot;

I'm trying to detect the keypoints and descriptors to match a template with another image. I started to follow this OpenCV tutorial, switched to ORB detector (as SURF algorithm is patented) but it's t...
test-img

erik7854

c#

opencv

emgucv

Votes: 0

Answers: 0

How to write on images using EmguCV in C#

I wanna write on images using EmguCV in Windows Form C# In actual I wanna create a simple app for images as an image editor. Its simple purpose is to open images through an open file dialogue I can op...
test-img

user15294548

c#

image

emgucv

image-text

Votes: 0

Answers: 1

Latest Answer

You can write on images with CvInvoke.PutText, one simple example is here: // load the image Mat image = new Mat("test.png"); // write "hello!" in red(0,0,255) at 100,100 c...
test-img

erik7854

C# .Net Emgu.CV is inconsistently transferring bytes to itself

I'm using Emgu.CV to templateMatch and to save Images. Unfortunetly I have ran into an issue that I have no been able to solve for a weeks. Problem is that i serialize byte array and size from origina...
test-img

Moxidus

c#

.net

image

opencv

emgucv

Votes: 0

Answers: 1

Latest Answer

So thank you to everyones help. The issue was indeed in the screenshot script. I've used incorrect combination of pixel formats which resulted in inconsistent bit transfer. But because the step proper...
test-img

Moxidus

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