ImageHashing | simple C # library | Hashing library
kandi X-RAY | ImageHashing Summary
kandi X-RAY | ImageHashing Summary
This is a very simple C# library used to generate average perceptual hashes of images and files containing image content. A similarity function is also included to compare hashes to one another and obtain a percentage on just how alike those hashes are. Various convenience methods are also provided to reduce the number of calls made by the user.
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QUESTION
I am Trying to compare two images which looks similar , but When I do pixel to pixel comparison ,they won't be similar . Here the Problem is the Image is compressed in different Ratios .
To give more Example , If we take the Facebook Profile picture and the Twitter Profile Picture and Compare Pixel by pixel , we will see images are NOT Same . But by look and feel, we will see Image are same (Image Width and Height are same)
I have tried one of the Library called ImageHashing
which is available in Python , when I use Average hashing , even when I Have dark Line on image it will show as same , where Phash will have same problem as Pixel to pixel compare .
The Other way which, I thought was Template matching
(OpenCV) , But I am not so convinced for Image Comparison
Is there any way can compare two similar images which are compressed or Sampled differently and get proper result ?
...ANSWER
Answered 2019-May-14 at 13:31You might consider the combined Mean Squared Error (MSE) and Structural Similarity Index (SSIM) processes taught in this tutorial:
https://www.pyimagesearch.com/2014/09/15/python-compare-two-images/
An MSE of 0 indicates a perfect match; A SIMM index of 1.00 indicates a perfect match. It's kind of arbitrary, but an MSE under 1000 and a SIMM Index above 0.5 would indicate a strong similarity despite differences in compression and angle.
QUESTION
I have a problem with my tasks. When I try to recive returned variable from my task I can't use a .Result property to get it. Here is my code:
...ANSWER
Answered 2017-Aug-11 at 13:02You should use Task
for the buffering variable. Not specifying the type means that the operation is not expected to return any result.
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