dynascan: 467; CRT Restorer/Analyzer

I have the manual for this equipment and have scanned it the best i can. Compressing the pages to 300kB files is no problem when using JPEG. As soon as i try to save the pages as PNG the file size explodes to 1MB and more. PNG compression setting in IrFanview is set to 9. I tried many other features to reduce size: converting to grayscale, resize etc. How do i upload the manual ?

I also have the tube chart, i haven't even started to scan the document out of frustration...

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Dear Patrick,

if the manual has no high resolution photos, I use to scan it as greyscale 256-level images. The next step is to enhance someway the image to the right contrast and resize it to a convenient size: 1200 wide for 2000 high is usually enough for easy reading. Then I decrease the color depth to 8, using the Floyd-Steinberg dithering option of IrfanView and save the resulting image using the best compression level, 9.

Hope that this way can help you.

Emilio

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Thank you for the info, Emilio.

I tried again with your tips in mind and this time it worked.

Now for scanning the tube chart...

Greetings,

Patrick

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Hi Patrick, hi Emilio,

you may get even better results without dithering.

Best regards,

Wolfgang

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I still have a whole lot of documents to scan. I'll try all features to get a maximum result.

Best regards,

Patrick

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