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Posted on 04/05/08 6:14:38 PM |
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chris berry
Overhead Overlord Posts: 724 Reply  |
bit map
Hi A client has requested a bit map version of a PS file. Does anyone know how to convert it? Cheers Chris |
Posted on 04/05/08 8:05:37 PM |
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Ocker
* Posts: 54 Reply |
Re: bit map
Hi Chris, My gut feeling is that you client does not know what a bitmap is, and is just asking for a generic file that he can use, ie, a tiff file. I'm assuming this is for print publishing use. If the image is simply black and white, and by that I mean no grey scales, then convert it to bitmap format just as you would convert from RGB to greyscale. Thus, IMAGE / MODE / BITMAP It must be 300dpi output and set the 'Method' to 50% threshold. The finished document will appear very blocky and almost pixellated, but it will print fine when it has been put into page layout software (ie, Quark) and then sent to an imagesetter. Of course, if the image is not a straight black and white logo, maybe a photo, then a greyscale 300dpi tiff file should be sent. Make sure there is no compression used when you save it. |
Posted on 04/05/08 8:24:28 PM |
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rufus
Destructive Demon Posts: 243 Reply  |
Re: bit map
Chris, You can 'Save As' a bmp file in the drop down menu and select the colour depth from the list. The saved image is flattened. rufus |
Posted on 05/05/08 3:27:03 PM |
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chris berry
Overhead Overlord Posts: 724 Reply |
Re: bit map
Hi ocker This is a colour image for web use - do I need to do anything different than what you've suggested? C |
Posted on 05/05/08 3:27:53 PM |
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chris berry
Overhead Overlord Posts: 724 Reply |
Re: bit map
Hi Rufus Will the finished result be a bitmap file? C |
Posted on 05/05/08 6:52:40 PM |
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Ocker
* Posts: 54 Reply |
Re: bit map
Ah, my gut feeling was correct. Please disregard everything I said! That was for print use, and the terms are quite specific. However, as your image is for web use, I would save it as a Gif or PNG file Or even a JPEG. The resolution is 72 dpi this time! I wouldn't worry too much about 'web-safe' colours these days, as I can't see anyone using a 256-colour monitor. Ask your client which file format he prefers. |
Posted on 05/05/08 8:03:35 PM |
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chris berry
Overhead Overlord Posts: 724 Reply |
Re: bit map
Hi Ocker So to clarify - saving it as a JPEG, Gif or png makes it a bitmap file? Chris |
Posted on 05/05/08 8:36:20 PM |
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rufus
Destructive Demon Posts: 243 Reply |
Re: bit map
Hi Chris, It's difficult to know what your client wants without further clarification. He could mean bitmap as opposed to vector graphics which would include all the file types mentioned including psd, or he could simply mean the bmp format itself. I found this explanation that may be useful http://graphicssoft.about.com/od/aboutgraphics/a/bitmapvector.htm rufus |
Posted on 06/05/08 10:01:49 AM |
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chris berry
Overhead Overlord Posts: 724 Reply |
Re: bit map
Thanks Rufus I'll check this out. Thanks for your help. Chris |
Posted on 06/05/08 4:17:18 PM |
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dave.cox
Marquee Master Posts: 518 Reply  |
Re: bit map
Chris, To answer your question; yes jpg, png, tiff, and gif are all bitmap image files. They each have different strengths and weaknesses. If the final result is to be displayed on the web, 72ppi (pixels per inch) is the most that you need, since that is all that a monitor can display. If the final result is to be for print, then 300ppi is better. If this is for print, most printers today, prefer PDF files. Dave |
Posted on 06/05/08 4:40:34 PM |
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chris berry
Overhead Overlord Posts: 724 Reply |
Re: bit map
Thanks Dave - and everyone else. That helps clarify things a little. Just when you think you know Photoshop........ Chris |