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#1
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threshold level between black and white when changing image type to monochrome
Hello
How to change a threshold level between black and white when changing image type to monochrome using "threshold" "Halftone" "Custom" mode in MS Photo Editor or in any other image editor? I want to convert a grayscale black and white drawing to a monochrome 1bit image. Since I do not know how to change a threshold level between black and white, the monochrome 1bit image results too light, some details are disappeared. |
#2
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Dima wrote:
Hello How to change a threshold level between black and white when changing image type to monochrome using "threshold" "Halftone" "Custom" mode in MS Photo Editor or in any other image editor? I want to convert a grayscale black and white drawing to a monochrome 1bit image. Since I do not know how to change a threshold level between black and white, the monochrome 1bit image results too light, some details are disappeared. It would seem to me that you are trying to convert a grayscalt to a line drawing. I would try the find edges function then go about dropping the unwanted tones and place emphasis on the edges. There is really no such thing as a monochrome 1 bit image, other than that of a line drawing. |
#3
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MS Office PhotoEditor names a "line drawing" "monochrome 1 bit" in an
image properties. |
#4
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When I have tried this I find I usually have to play with the contrast
and brightness controls a lot BEFORE I convert to the one-bit mode. I also sometimes have to use a filter that washes out variations spatially across the image. |
#5
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Jack-of-the-Dust wrote:
There is really no such thing as a monochrome 1 bit image, other than that of a line drawing. www.google.com: image dithering http://www.dca.fee.unicamp.br/dipcou...ront-page.html http://www.webstyleguide.com/graphics/dither.html .... |
#6
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Jack-of-the-Dust wrote:
There is really no such thing as a monochrome 1 bit image, other than that of a line drawing. www.google.com: image dithering http://www.dca.fee.unicamp.br/dipcou...ront-page.html http://www.webstyleguide.com/graphics/dither.html .... |
#7
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Dima wrote:
Hello How to change a threshold level between black and white when changing image type to monochrome using "threshold" "Halftone" "Custom" mode in MS Photo Editor or in any other image editor? I want to convert a grayscale black and white drawing to a monochrome 1bit image. Since I do not know how to change a threshold level between black and white, the monochrome 1bit image results too light, some details are disappeared. If you really want to do this it requires resampling to a huge output file size & will be a slow memory intensive operation. You should be asked what resolution to output, chose a higher number like 600dpi or more. It won't be readable on a computer monitor until you zoom in 100%. This is for making something that will xerox well or for making a silkscreen print. It will use either lines or dots to represent the shades. |
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