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Questions tagged [enhancement]

The tag has no usage guidance.

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1answer
98 views

Automatic Image Enhancement of Images of Scanned Documents (Auto Whitening)

Dropbox have make a blog post about there automatic enhancement method for scanned document image - Fast Document Rectification and Enhancement. I followed the post and they mention a formula to make ...
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0answers
90 views

Improving credit-card-like image scan for OCR

OCR works best for black on white or binary images, where letters have sharp contours, no noise, and solid filling, i.e. they are nothing like this: For the curious it's a part of a document number ...
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0answers
39 views

speech transient separation techniques?

I am trying to separate a noisy speech mixture. I did several tests, for example, try to filter the speech with random broadband noise, harmonic noise, reverb, etc, but I can't seem to tackle the ...
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1answer
132 views

Enhance image in matlab - exp operation - imageJ software-LPR

I use imageJ software, imageJ has a EXP command (process >math >exp ). original image: output image processed by EXP command in imageJ software: in this link explain how do that ImageJ: http://...
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1k views

Image enhancement algorithms for adjusting shadow, exposure, contrast etc

For those who have either used Picasa/Photoshop, they would see different image enhancement options such as: Change exposure Change shadow Change highlights Change vibrance I have searched online a ...
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2answers
285 views

Speech Enhancement Libraries

Is there any speech enhancement algorithm library? I need to process a sound to voice recognition, and I want to remove noise from audio source.
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1answer
444 views

Remove spurious peaks of Hilbert transform

I want to eliminate spurious peaks of Hilbert transform for finding glottal closure in the linear prediction (LP) residual. I have the following 4 steps: Down-sample. Hilbert Transform. Identify ...
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4answers
5k views

How to Generate False Color Palette

How to convert grayscale intensity input to something like the following image? It seems that no response (0, black) is converted to dark blue, then it goes through other colors to red. How are ...