Re: [Gimp-user] Rotate increases PNG size x10 ! - next Q

2010-06-25 Thread Philip Rhoades
Chris, On 2010-06-25 02:54, Chris Mohler wrote: On Thu, Jun 24, 2010 at 6:16 AM, Philip Rhoadesp...@pricom.com.au wrote: Confirmation of what is going on from the gurus would be appreciated! It was as I guessed - the scans are in grayscale mode but the contents are essentially a 1-bit

Re: [Gimp-user] Rotate increases PNG size x10 ! - next Q

2010-06-25 Thread Branko Vukelic
On Fri, Jun 25, 2010 at 4:45 PM, Philip Rhoades p...@pricom.com.au wrote: OK, so now the next question is:  If the original is recognised by identify as a 1 bit per pixel image, why doesn't Gimp keep it that way when opening the file?  At 300dpi there is no real issue with jaggy edges - is it

Re: [Gimp-user] Rotate increases PNG size x10 ! - next Q

2010-06-25 Thread Philip Rhoades
Branko, On 2010-06-26 00:54, Branko Vukelic wrote: On Fri, Jun 25, 2010 at 4:45 PM, Philip Rhoadesp...@pricom.com.au wrote: OK, so now the next question is: If the original is recognised by identify as a 1 bit per pixel image, why doesn't Gimp keep it that way when opening the file? At

Re: [Gimp-user] Rotate increases PNG size x10 !

2010-06-24 Thread Claus Cyrny
Chris Mohler wrote: On Wed, Jun 23, 2010 at 5:30 PM, Leon Brooks leon-g...@cyberknights.com.au wrote: If the image is text or something else essentially monochrome Or image-mode, bitmap, 1-bit palette should drastically reduce the file size. I suspect that the 'line art' setting in

Re: [Gimp-user] Rotate increases PNG size x10 !

2010-06-24 Thread Chris Mohler
On Thu, Jun 24, 2010 at 6:16 AM, Philip Rhoades p...@pricom.com.au wrote: Confirmation of what is going on from the gurus would be appreciated! It was as I guessed - the scans are in grayscale mode but the contents are essentially a 1-bit image. Open a scan, do image-mode-bitmap, choose 1-bit

Re: [Gimp-user] Rotate increases PNG size x10 ! - resending

2010-06-24 Thread Philip Rhoades
People, I am resending this - the firsts attempt with the attachment didn't make it apparently . . I can provide it if anyone is interested . . On 2010-06-24 10:08, Chris Mohler wrote: On Wed, Jun 23, 2010 at 5:30 PM, Leon Brooks leon-g...@cyberknights.com.au wrote: If the image is text or

Re: [Gimp-user] Rotate increases PNG size x10 !

2010-06-24 Thread Philip Rhoades
Chris, On 2010-06-25 02:54, Chris Mohler wrote: On Thu, Jun 24, 2010 at 6:16 AM, Philip Rhoadesp...@pricom.com.au wrote: Confirmation of what is going on from the gurus would be appreciated! It was as I guessed - the scans are in grayscale mode but the contents are essentially a 1-bit

Re: [Gimp-user] Rotate increases PNG size x10 !

2010-06-23 Thread Branko Vukelic
On Wed, Jun 23, 2010 at 8:07 PM, Philip Rhoades p...@pricom.com.au wrote: What is going on with these size increases? It may be that after rotation, pixels that were otherwise the same color got anti-aliased and were slightly different color. This would increase the image size. Can you show us

Re: [Gimp-user] Rotate increases PNG size x10 !

2010-06-23 Thread Leon Brooks
On Thu, 24 Jun 2010 06:04:57 am Branko Vukelic wrote: On Wed, Jun 23, Philip Rhoades wrote: What is going on with these size increases? It may be that after rotation, pixels that were otherwise the same color got anti-aliased and were slightly different color. This would increase the image

Re: [Gimp-user] Rotate increases PNG size x10 !

2010-06-23 Thread Chris Mohler
On Wed, Jun 23, 2010 at 5:30 PM, Leon Brooks leon-g...@cyberknights.com.au wrote: If the image is text or something else essentially monochrome Or image-mode, bitmap, 1-bit palette should drastically reduce the file size. I suspect that the 'line art' setting in xsane is producing a grayscale