Is this image good enough for OCR? Hello I'm trying to ocr on a special image.

I've done adaptive threshold , polartocartesian transformation.

this is my original image


this is adaptive threshold



this is polartocartesian transformation



what do you think is this image good enough for OCR or do I have to optimize my preprocessing steps ?
It looks like using the polartocartesian transformation is destroying the characters (look at the "M", "E" before and after...). I think it will be a better idea to think about some rotations mechanism using imrotate.

Any way, I'd try the following additional pre-proc:
1. you might want to perform some morphological operations on the image after the adaptive threshold. 
2. I would also try labeling the image (bwlabel) and removing too large objects (most of the background noise in your image is connected so it will be a huge object - in terms of pixel counting)

Have fun!