atw: Re: black and white

thanks Alon that might do it.


>From: "Hadass, Alon" <Alon.Hadass@xxxxxx>
>Reply-To: austechwriter@xxxxxxxxxxxxx
>To: <austechwriter@xxxxxxxxxxxxx>
>Subject: atw: Re: black and white
>Date: Mon, 26 Jul 2004 11:16:25 +1000
>
>Hi Erisa,
>
>Some graphics packages (like PaintShop Pro) have a feature called =
>histogram.
>You can use a histogram to view statistical information about your =
>image.
>
>If you look at the histogram of the greyscale channel of the image, you =
>will see the percentage of your white pixels (255) or your black pixels =
>(0). Some programs show a pixel count rather than percentage.
>
>Cheers,
>Alon Hadass
>
>-----Original Message-----
>From: austechwriter-bounce@xxxxxxxxxxxxx =
>[mailto:austechwriter-bounce@xxxxxxxxxxxxx] On Behalf Of erisa linsky
>Sent: Monday, 26 July 2004 10:52 AM
>To: austechwriter@xxxxxxxxxxxxx
>Subject: atw: Re: black and white
>
>Sorry to be boring or obtuse.  No I am not getting muddled.
>I am trying to get a clinically acceptable method for detecting the =
>effectiveness of lint removal in washing machines.
>If I can scan in the fabric and test the percentage of white on =
>black,then I will have a test.
>
>
> >From: "Michael Granat" <mgranat@xxxxxxxxxxxxxx>
> >Reply-To: austechwriter@xxxxxxxxxxxxx
> >To: <austechwriter@xxxxxxxxxxxxx>
> >Subject: atw: Re: black and white
> >Date: Mon, 26 Jul 2004 10:40:27 +1000
> >
> >Well Daryl (C), one can only ever measure the amount of white, as black =
>
> >is an absence of colour and white contains the entire RGB spectrum.
> >
> >Otherwise, we'd have white screens on B&W TVs and the stations would=20
> >only transmit the black bits.
> >
> >Hey, on the other hand, if we used black paper with white toner,=20
> >printing would become so prohibitively expensive that we could actually =
>
> >achieve the "paperless office".
> >
> >That aside, I did a test greyscale conversion on an image a moment ago=20
> >in=3D
> >
> >HiJaak Pro, which can tell me the properties (aka Image Attributes) in=20
> >terms of the bytes size of file, nature of format, pixels area and the=20
> >like but, like most other graphics packages that I have seen, will not=20
> >tell you the percentage.
> >
> >Hey, Erisa (Linsky) you're not just getting confused with the dot=20
> >screen percentages that a printer (the person, not the device) requires =
>
> >for greyscale printing, are you?
> >
> >Cheers,
> >
> >Michael
> >
> >Michael E. Granat
> >T/as Write Ideas
> >Technical Communicator
> >Without Prejudice. E&OE.
> >
> >"I have made this letter longer than usual, only because I have not had =
>
> >the time to make it shorter." - Blaise Pascal
> >
> >
> >
> >-----Original Message-----
> >From: Colquhoun, Daryl [mailto:daryl.colquhoun@xxxxxx]
> >Sent: 26 July 2004 10:00
> >To: austechwriter@xxxxxxxxxxxxx
> >Subject: atw: Re: black and white
> >
> ><snip>
> >Or did you mean the percentage of black and white overall in the image?
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