| T O P I C R E V I E W |
| sifu |
Posted - 05/11/2006 : 12:58:06 AM
Origin Version (Select Help-->About Origin): 7.0 SR0
Operating System: Win2000
I used file--> export, i chose tif and 1200dpi CMYK gray scale and LMZ compression, but Origin didn't respose and the pic i want has not been exported. But i chose tif and 600dpi CMYK gray scale and LMZ compression, a pic has been exported successfully. What can i do? Thanks |
| 3 L A T E S T R E P L I E S (Newest First) |
| zachary_origin |
Posted - 05/14/2006 : 04:04:26 AM
Hi, sifu
quote:
Thank you! I think i have resolved my problem. My way: i used origin to export my picture to 600dpi bmp firstly, each of my picture is about 90MB, and then i used Photoshop to change the bmp pic i exported to 3.5inch and 1200dpi. At last, i used Photoshop to save my picture to tif mode and used LZW compression. Each pic is less than 1MB!
But i still have questions:
1. The pic i exported from origin is 600dpi, but in photoshop, PS can't recognize the pic's dpi, so in PS, the pic is 72dip default. Of course, it dosen't matter for my problem.
I dont think you really resolved the problem. Because the picture exported from origin is only 600dpi, when you change the resolution in Photoshop, it is actually a kind of resampling/interpolating and it does not make any sense for a pixel image (constrast to vector image).
quote:
2. 8*11*1200*1200 *256/8 = 4,055,040,000bytes Why there are two 1200 in the equation?
DPI is defined as dots per inch, the resolution 1200dpi actually represents 1200dpi*1200dpi. The picture is 8inch*11 inch, so it should be 8*1200*11*1200 dots.
quote:
3. In origin, do i change the default image size 8inch*11inch?
Do you mean how to change it? You can change it like this: Active the graph, select memu Format -> Page(F2), change the settings in the Print/Dimensions tab.
Zachary
originlab GZoffice
Edited by - zachary_origin on 05/14/2006 04:05:37 AM |
| sifu |
Posted - 05/13/2006 : 7:58:10 PM
Thank you! I think i have resolved my problem. My way: i used origin to export my picture to 600dpi bmp firstly, each of my picture is about 90MB, and then i used Photoshop to change the bmp pic i exported to 3.5inch and 1200dpi. At last, i used Photoshop to save my picture to tif mode and used LZW compression. Each pic is less than 1MB!
But i still have questions:
1. The pic i exported from origin is 600dpi, but in photoshop, PS can't recognize the pic's dpi, so in PS, the pic is 72dip default. Of course, it dosen't matter for my problem.
2. 8*11*1200*1200 *256/8 = 4,055,040,000bytes Why there are two 1200 in the equation?
3. In origin, do i change the default image size 8inch*11inch? |
| zachary_origin |
Posted - 05/13/2006 : 6:30:32 PM
The following is my reply to an user who has a simalar problem about Exporting tiff pic with 1200dpi. Hope it helps.
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It's something about the amount of RAM your computer has. The problem lies in the Windows Operating system it self. The internal Windows functions that we use to create the image in memory require all of the memory to be unfragmented.
You can calculate the amount of memory for the image required as follows:
for a image in 1200 DPI resolution, 256 Color Depth;
8*11*1200*1200 *256/8 = 4,055,040,000bytes
where 8inch*11inch is the image size by default in Origin, 1200 is the resolution, 256 is the color depth; 8 is that 1byte=8bite.
That is to say, to export an image in 1200 DPI resolution, 256 Color Depth, your computer needs about 4GB memory. In fact, it's maybe more than 4GB needed, which lies in the Windows Operation System itself.
By the way, I don't think you need a scientific image in 1200 DPI
resolution. For most journals or publications, 600 DPI is enough. And the color depth set as 16 is Ok for your image.
Hope my explaination can do some help.
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Zachary
Originlab GZoffice |
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