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I see a few possible solutions for your particular task: - it seems that simple and fast phase correlate should be enough, see phaseCorrelate() function docs; - text is self-similar on the letter size scale and not self-similar on the word size scale, hence you can try to increase zone for key-point descriptor if you want to stay in salient points approach.

I see a few possible solutions for your particular task: - task:

• it seems that simple and fast phase correlate should be enough, see phaseCorrelate() function docs; - docs;
• text is self-similar on the letter size scale and not self-similar on the word size scale, hence you can try to increase zone for key-point descriptor if you want to stay in salient points approach.

I see a few possible solutions for your particular task:

• it seems that simple and fast phase correlate should be enough, see phaseCorrelate() function docs;docs; may be some size normalization should be performed (based on lines interval, letters size etc) or brute force like build size pyramid using small steps like (1.5)^(1/8) = 1.05
• text is self-similar on the letter size scale and not self-similar on the word size scale, hence you can try to increase zone for key-point descriptor if you want to stay in salient points approach.