comp.lang.idl-pvwave archive: archive » Processing about 10,000 tif files

Home » Public Forums » archive » Processing about 10,000 tif files

Show: Today's Messages :: Show Polls :: Message Navigator
E-mail to friend

Re: Processing about 10,000 tif files [message #90978 is a reply to message #90977]

Tue, 19 May 2015 15:12

Helder Marchetto
Messages: 520
Registered: November 2011

Senior Member

On Wednesday, May 20, 2015 at 12:03:23 AM UTC+2, Helder wrote:
> On Tuesday, May 19, 2015 at 11:07:39 PM UTC+2, livingw...@gmail.com wrote:
>> Dear Gurus,
>>
>> I have RGB images in tif format and want to do simple arithmetic calculations.
>> A big obstacle to me is number of files to be processed, about 10,000 images.
>> Name of the image files has sequential id such as img_1.tif, img_2.tif, ....., img_10000.tif.
>> And I have a text file containing image names, coefficients, and offsets.
>> I think reading the text file as an array with three columns and lines matching number of files seems to be successful.
>>
>> I've tried to read image files with dialog_pickfile, but I've learned that the function limits byte length and can't seem to go beyond more than 2,000 files or so.
>> And I've tried to read image files with file_search, but it didn't do calculation in sequential order.
>>
>> Would you give some suggestion how to read image files in order, so that following calculation should be in order from 1 to 10,000?
>> Or a way to do calculation with image name corresponding lines in the text file?
>>
>> Thanks in advance,
>> Kim
>
> I've been there before and I see two ways out of this:
> 1) construct the file array with something like 'img_'+strtrim(indgen(10000)+1,2)+'.tif'
> 2) use file_search and then sort the file array to have the order you wish
> 3) read the text file sequentially and process sequentially
>
> Option 2) is not easy because the files don't have a format like img_00001.tif, otherwise sorting would be easier.
>
> Hope it helps.
> Helder

Brilliant... two ways out in three points. Don't drink and type.
Helder

Report message to a moderator

[Message index]

		Processing about 10,000 tif files By: livingwater000 on Tue, 19 May 2015 14:07
		Re: Processing about 10,000 tif files By: Helder Marchetto on Tue, 19 May 2015 15:03
		Re: Processing about 10,000 tif files By: Helder Marchetto on Tue, 19 May 2015 15:12
		Re: Processing about 10,000 tif files By: livingwater000 on Tue, 19 May 2015 18:01
		Re: Processing about 10,000 tif files By: andrewcool777 on Sun, 24 May 2015 18:23
		Re: Processing about 10,000 tif files By: cgguido on Tue, 26 May 2015 19:05

Previous Topic:	3D point cloud visualization
Next Topic:	Stretch color image with colorbar compatible issue

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Fri Oct 10 11:42:42 PDT 2025

Total time taken to generate the page: 1.03981 seconds