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I'm a bit confuse.

I can detected a book, from a picture of 4 books. But can't detect a sign, from a picture of 3 books.

Very Similar Conditions, OpenCV - wise.

If I normalize / equalize histograms, it will help ? (I will guess a bit..)

What is the reasons to the following results ?

Pictures - Books : https://ibb.co/KrXtPw0 Signs : https://imgur.com/a/QLQ9MLA

Any suggestions can help.. Thank's,

I'm a bit confuse.

I can detected a book, from a picture of 4 books. But can't detect a sign, from a picture of 3 books.

Very Similar Conditions, OpenCV - wise.

If I normalize / equalize histograms, it will help ? (I will guess a bit..)

What is the reasons to the following results ?

Pictures - Books : https://ibb.co/KrXtPw0 Signs : https://imgur.com/a/QLQ9MLA

Any suggestions can help.. Thank's,

I'm a bit confuse.

I can detected a book, from a picture of 4 books. But can't detect a sign, from a picture of 3 books.

Very Similar Conditions, OpenCV - wise.

If I normalize / equalize histograms, it will help ? (I will guess a bit..)

What is the reasons to the following results ?

Pictures - Books : https://ibb.co/KrXtPw0 Signs : https://imgur.com/a/QLQ9MLA

Any suggestions can help.. Thank's,

I'm a bit confuse.

I can detected a book, from a picture of 4 books. But can't detect a sign, from a picture of 3 books.

Very Similar Conditions, OpenCV - wise.

If I normalize / equalize histograms, it will help ? (I will guess a bit..)

What is the reasons to the following results ?

Pictures - -

Books : https://ibb.co/KrXtPw0 Signs : https://imgur.com/a/QLQ9MLA

Any suggestions can help.. Thank's,