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Remove gradient background from image

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Hi all,

 

I found a very decent OCR app for the iPhone (Perfect OCR). I trying to extract text from an image (640x960) of a slide. I would like to remove the purple gradient background and replace it with black with the white text. I've successfully OCR'ed a slide with less text. Removing the gradient would make things easier.

 

Is there an app to di this? I have Color FX, Photo FX, TouchRetouch, Photogene, Brushes, Sketchbook, Filterstorm, and a few other photo editing apps.

 

Anything info would be appreciated.

 

BTW, I'm just saving the text for my notes on the subject.

 

Thanks!

Steven

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Update: using the "B/W - Green" filter in Photo FX did a great job in reducing the brighter purple area in the slide. Got the text. Only needed slight editing.

 

I still would like to know how to eliminate a color or hue range from an image using an iPhone/iPad app.

 

Thanks!

Steven

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you should install "intern". it's very useful and is often free.

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