convert and modify

[ghostfox3]

Hello, I previously posted about crop to photo service changing resolution from 300 ppi to 72 ppi on my images. Well ... I decided to use convert & modify to change tiffs to jpegs ... and the resolution is again changing from 300 ppi to 72 ppi. How can I rectify this? I have a few hundred photos to crop and convert to jpeg. Again I have looked in all the dialogue boxes I can think. I am using version 7.2. Snow Leopard. iMac Thanks in advance. Loretta

[Brian Christmas]

G'day'Crop to Photo service' works fine in GC 8.5.1, (running mountain lion), but while the subject is raised, I'd like to see an option that would also resize the crop to 6"x4" at the same time, as I regularly print 3 such sized photos on an A4 sheet.RegardsBrian On 07/03/2013, at 1:18 PM, ghostfox3 <loretts54@monarchjourney.com> wrote:   Hello, I previously posted about crop to photo service changing resolution from 300 ppi to 72 ppi on my images. Well ... I decided to use convert & modify to change tiffs to jpegs ... and the resolution is again changing from 300 ppi to 72 ppi. How can I rectify this? I have a few hundred photos to crop and convert to jpeg. Again I have looked in all the dialogue boxes I can think. I am using version 7.2. Snow Leopard. iMac Thanks in advance. Loretta

[Alfred J Treder]

Loretta,Probably nothing bad is happening. The conversion from TIFF to JPEG is done without changing the number of pixels or the proportions of the image. You said earlier that you were producing 4x6 images at 300 ppi, which would be a good resolution for printing. That means you are creating files that are 1200 pixels by 1800 pixels. After the conversion to JPEG, you still have a file that will print 4x6 inches at 300 ppi, if you direct the printing process to print the file in the 4x6 size. When you see an indication that the resolution is 72 ppi, the associated image size would be 16.667x25.000 inches. The same file can be printed or displayed larger or smaller, depending on how the printing or display instructions are set up. Graphic Converter makes this easy, generally, but does also allow a lot of options. I may have said too much or perhaps not understood your problem. Are you saying that after conversion to JPEG the resolution is at 72 ppi AND the size is 4 inches by 6 inches? If that were true you would have a problem to solve for sure. One test of that would be to look at the file on your computer monitor, and crank up its size to bigger than 4x6 inches. It would be pixelated if the file had become reduced in pixel density, and would look normal on the screen even blown up 2 or 3 times if the file was still OK. Al Treder“ Nothing splendid has ever been achieved except by those who dared believe that something inside them was superior to circumstances.”-- Bruce Barton On Mar 6, 2013, at 6:18 PM, "ghostfox3" <loretts54@monarchjourney.com> wrote:   Hello, I previously posted about crop to photo service changing resolution from 300 ppi to 72 ppi on my images. Well ... I decided to use convert & modify to change tiffs to jpegs ... and the resolution is again changing from 300 ppi to 72 ppi. How can I rectify this? I have a few hundred photos to crop and convert to jpeg. Again I have looked in all the dialogue boxes I can think. I am using version 7.2. Snow Leopard. iMac Thanks in advance. Loretta

[loretts54@MJ]

Alfred,Thanks for your reply.I posted my  reply to the group.Could not figure out how to send a photo to group.Here it is.Note change in size and resolution despite my selecting to keep resolution at 300 ppi.Loretta On Mar 6, 2013, at 10:11 PM, Alfred J Treder wrote:   Loretta,Probably nothing bad is happening. The conversion from TIFF to JPEG is done without changing the number of pixels or the proportions of the image. You said earlier that you were producing 4x6 images at 300 ppi, which would be a good resolution for printing. That means you are creating files that are 1200 pixels by 1800 pixels. After the conversion to JPEG, you still have a file that will print 4x6 inches at 300 ppi, if you direct the printing process to print the file in the 4x6 size. When you see an indication that the resolution is 72 ppi, the associated image size would be 16.667x25.000 inches. The same file can be printed or displayed larger or smaller, depending on how the printing or display instructions are set up. Graphic Converter makes this easy, generally, but does also allow a lot of options. I may have said too much or perhaps not understood your problem. Are you saying that after conversion to JPEG the resolution is at 72 ppi AND the size is 4 inches by 6 inches? If that were true you would have a problem to solve for sure. One test of that would be to look at the file on your computer monitor, and crank up its size to bigger than 4x6 inches. It would be pixelated if the file had become reduced in pixel density, and would look normal on the screen even blown up 2 or 3 times if the file was still OK. Al Treder“ Nothing splendid has ever been achieved except by those who dared believe that something inside them was superior to circumstances.”-- Bruce Barton On Mar 6, 2013, at 6:18 PM, "ghostfox3" <loretts54@monarchjourney.com> wrote:   Hello, I previously posted about crop to photo service changing resolution from 300 ppi to 72 ppi on my images. Well ... I decided to use convert & modify to change tiffs to jpegs ... and the resolution is again changing from 300 ppi to 72 ppi. How can I rectify this? I have a few hundred photos to crop and convert to jpeg. Again I have looked in all the dialogue boxes I can think. I am using version 7.2. Snow Leopard. iMac Thanks in advance. Loretta

[ghostfox3]

Alfred, Thanks for your reply. I do not know where my response went that I referred to in my last post. I have a screen shot showing the image info before and after. The size and a resolution changes, though I have selected 300 ppi and it is not saving as a jpeg as I have also selected. Loretta --- In gcmac@yahoogroups.com, Alfred J Treder <altreder@...> wrote: > > Loretta, > > Probably nothing bad is happening. The conversion from TIFF to JPEG is done without changing the number of pixels or the proportions of the image. You said earlier that you were producing 4x6 images at 300 ppi, which would be a good resolution for printing. That means you are creating files that are 1200 pixels by 1800 pixels. After the conversion to JPEG, you still have a file that will print 4x6 inches at 300 ppi, if you direct the printing process to print the file in the 4x6 size. When you see an indication that the resolution is 72 ppi, the associated image size would be 16.667x25.000 inches. The same file can be printed or displayed larger or smaller, depending on how the printing or display instructions are set up. Graphic Converter makes this easy, generally, but does also allow a lot of options. > > I may have said too much or perhaps not understood your problem. Are you saying that after conversion to JPEG the resolution is at 72 ppi AND the size is 4 inches by 6 inches? If that were true you would have a problem to solve for sure. One test of that would be to look at the file on your computer monitor, and crank up its size to bigger than 4x6 inches. It would be pixelated if the file had become reduced in pixel density, and would look normal on the screen even blown up 2 or 3 times if the file was still OK. > > Al Treder > > " Nothing splendid has ever been achieved except by those who dared believe that something inside them was superior to circumstances." > > -- Bruce Barton > > On Mar 6, 2013, at 6:18 PM, "ghostfox3" <loretts54@...> wrote: > > Hello, > > I previously posted about crop to photo service changing resolution from 300 ppi to 72 ppi on my images. > > Well ... > I decided to use convert & modify to change tiffs to jpegs ... and the resolution is again changing from 300 ppi to 72 ppi. > > How can I rectify this? I have a few hundred photos to crop and convert to jpeg. Again I have looked in all the dialogue boxes I can think. > > I am using version 7.2. Snow Leopard. iMac > Thanks in advance. > > Loretta >

[Alfred J Treder]

Loretta,If both size and resolution change, but the pixel dimensions remain the same (which I figure is true), then your output file has lost nothing, even though you're not getting exactly what you want. I don't know what's happening there. Al“ You only live once. But if you work it right, once is enough.”-- Fred Allen  On Mar 6, 2013, at 7:59 PM, "ghostfox3" <loretts54@monarchjourney.com> wrote:   Alfred, Thanks for your reply. I do not know where my response went that I referred to in my last post. I have a screen shot showing the image info before and after. The size and a resolution changes, though I have selected 300 ppi and it is not saving as a jpeg as I have also selected. Loretta --- In gcmac@yahoogroups.com, Alfred J Treder wrote: > > Loretta, > > Probably nothing bad is happening. The conversion from TIFF to JPEG is done without changing the number of pixels or the proportions of the image. You said earlier that you were producing 4x6 images at 300 ppi, which would be a good resolution for printing. That means you are creating files that are 1200 pixels by 1800 pixels. After the conversion to JPEG, you still have a file that will print 4x6 inches at 300 ppi, if you direct the printing process to print the file in the 4x6 size. When you see an indication that the resolution is 72 ppi, the associated image size would be 16.667x25.000 inches. The same file can be printed or displayed larger or smaller, depending on how the printing or display instructions are set up. Graphic Converter makes this easy, generally, but does also allow a lot of options. > > I may have said too much or perhaps not understood your problem. Are you saying that after conversion to JPEG the resolution is at 72 ppi AND the size is 4 inches by 6 inches? If that were true you would have a problem to solve for sure. One test of that would be to look at the file on your computer monitor, and crank up its size to bigger than 4x6 inches. It would be pixelated if the file had become reduced in pixel density, and would look normal on the screen even blown up 2 or 3 times if the file was still OK. > > Al Treder > > " Nothing splendid has ever been achieved except by those who dared believe that something inside them was superior to circumstances." > > -- Bruce Barton > > On Mar 6, 2013, at 6:18 PM, "ghostfox3" wrote: > > Hello, > > I previously posted about crop to photo service changing resolution from 300 ppi to 72 ppi on my images. > > Well ... > I decided to use convert & modify to change tiffs to jpegs ... and the resolution is again changing from 300 ppi to 72 ppi. > > How can I rectify this? I have a few hundred photos to crop and convert to jpeg. Again I have looked in all the dialogue boxes I can think. > > I am using version 7.2. Snow Leopard. iMac > Thanks in advance. > > Loretta >

[Carl von Einem]

From the screenshot I can see that you cropped the longer side of your image. The new image uses the extension .tif in the file name but the file format is actually a JPG. So something went wrong with the renaming of your processed image. The term resolution has nothing to do with image size (in pixels), let's just have a closer look at the information in your screenshot: left image: 6.43 x 10.04 inch @ 300 ppi right image: 26.78 x 40.17 inch @ 72 dpi Now let's compare the width of both images using a calculator: left: 300 pixels x 6.43 = 1929 pixels right: 72 pixels x 26.78 = 1928 pixels (rounded to full pixel count) The "missing" pixel in the right image's width is just a rounding error in GC's info box: 1929 pixels / 72 = 26,79166666667 Hey, I found a bug I think somewhere in the prefs you can find an option to also display the pixel size in that info area. PPI reads "pixels per inch" or pixel density, it's nicely explained in this short article: http://wiki.panotools.org/DPI Back to the naming problem I mentioned first: I also once shot a photo "DSC_0307" which looks completely different?! Therefore I recommend to rename images to something unique like <your initials> + <yyyymmdd> + <hhmmss> + <original file number> That's a simple one line command in Exiftool which renames thousands of images in seconds. Carl ghostfox3 schrieb am 07.03.13 04:59: > Alfred, > > Thanks for your reply. I do not know where my response went that I referred to in my last post. > > I have a screen shot showing the image info before and after. The size and a resolution changes, though I have selected 300 ppi and it is not saving as a jpeg as I have also selected. > > > Loretta > > > > --- In gcmac@yahoogroups.com, Alfred J Treder<altreder@...> wrote: >> >> Loretta, >> >> Probably nothing bad is happening. The conversion from TIFF to JPEG is done without changing the number of pixels or the proportions of the image. You said earlier that you were producing 4x6 images at 300 ppi, which would be a good resolution for printing. That means you are creating files that are 1200 pixels by 1800 pixels. After the conversion to JPEG, you still have a file that will print 4x6 inches at 300 ppi, if you direct the printing process to print the file in the 4x6 size. When you see an indication that the resolution is 72 ppi, the associated image size would be 16.667x25.000 inches. The same file can be printed or displayed larger or smaller, depending on how the printing or display instructions are set up. Graphic Converter makes this easy, generally, but does also allow a lot of options. >> >> I may have said too much or perhaps not understood your problem. Are you saying that after conversion to JPEG the resolution is at 72 ppi AND the size is 4 inches by 6 inches? If that were true you would have a problem to solve for sure. One test of that would be to look at the file on your computer monitor, and crank up its size to bigger than 4x6 inches. It would be pixelated if the file had become reduced in pixel density, and would look normal on the screen even blown up 2 or 3 times if the file was still OK. >> >> Al Treder >> >> " Nothing splendid has ever been achieved except by those who dared believe that something inside them was superior to circumstances." >> >> -- Bruce Barton >> >> On Mar 6, 2013, at 6:18 PM, "ghostfox3"<loretts54@...> wrote: >> >> Hello, >> >> I previously posted about crop to photo service changing resolution from 300 ppi to 72 ppi on my images. >> >> Well ... >> I decided to use convert& modify to change tiffs to jpegs ... and the resolution is again changing from 300 ppi to 72 ppi. >> >> How can I rectify this? I have a few hundred photos to crop and convert to jpeg. Again I have looked in all the dialogue boxes I can think. >> >> I am using version 7.2. Snow Leopard. iMac >> Thanks in advance. >> >> Loretta >> > > > > > ------------------------------------ > > Yahoo! Groups Links > > > >

[Ermanno Polli]

On 07/03/13 09:21, Carl von Einem wrote: > From the screenshot I can see that you cropped the longer side of your > image. The new image uses the extension .tif in the file name but the > file format is actually a JPG. > So something went wrong with the renaming of your processed image. > > The term resolution has nothing to do with image size (in pixels), let's > just have a closer look at the information in your screenshot: > > left image: 6.43 x 10.04 inch @ 300 ppi > right image: 26.78 x 40.17 inch @ 72 dpi > > Now let's compare the width of both images using a calculator: > left: 300 pixels x 6.43 = 1929 pixels > right: 72 pixels x 26.78 = 1928 pixels (rounded to full pixel count) I may add that the pixel number hasn't significantly changed, too: left image: 5.8 Mpix right image: 5.6 Mpix (This is a shortcut to your conclusions ) So the missing pixels could be due to the small crop at the bottom. Despite the .tif suffix, the right image *is* a JPEG, as you said before, you may see it from the file size that is heavily shrinked. Loretta, I would worry more about this thinning (1:20 compression). You may see the same number of pixel but the pixel contents is *not* the same. It's "rebuilt". The quality is worse than the original. It may or may not satisfy you.. Ciao, Ermanno > The "missing" pixel in the right image's width is just a rounding error > in GC's info box: 1929 pixels / 72 = 26,79166666667 > > Hey, I found a bug > > I think somewhere in the prefs you can find an option to also display > the pixel size in that info area. > > PPI reads "pixels per inch" or pixel density, it's nicely explained in > this short article: http://wiki.panotools.org/DPI > > Back to the naming problem I mentioned first: I also once shot a photo > "DSC_0307" which looks completely different?! > Therefore I recommend to rename images to something unique like > <your initials> + <yyyymmdd> + <hhmmss> + <original file number> > That's a simple one line command in Exiftool which renames thousands of > images in seconds. > > Carl > > ghostfox3 schrieb am 07.03.13 04:59: > > Alfred, > > > > Thanks for your reply. I do not know where my response went that I > referred to in my last post. > > > > I have a screen shot showing the image info before and after. The > size and a resolution changes, though I have selected 300 ppi and it is > not saving as a jpeg as I have also selected. > > > > > > Loretta > > > > > > > > --- In gcmac@yahoogroups.com <mailto:gcmac%40yahoogroups.com>, Alfred > J Treder<altreder@...> wrote: > >> > >> Loretta, > >> > >> Probably nothing bad is happening. The conversion from TIFF to JPEG > is done without changing the number of pixels or the proportions of the > image. You said earlier that you were producing 4x6 images at 300 ppi, > which would be a good resolution for printing. That means you are > creating files that are 1200 pixels by 1800 pixels. After the conversion > to JPEG, you still have a file that will print 4x6 inches at 300 ppi, if > you direct the printing process to print the file in the 4x6 size. When > you see an indication that the resolution is 72 ppi, the associated > image size would be 16.667x25.000 inches. The same file can be printed > or displayed larger or smaller, depending on how the printing or display > instructions are set up. Graphic Converter makes this easy, generally, > but does also allow a lot of options. > >> > >> I may have said too much or perhaps not understood your problem. Are > you saying that after conversion to JPEG the resolution is at 72 ppi AND > the size is 4 inches by 6 inches? If that were true you would have a > problem to solve for sure. One test of that would be to look at the file > on your computer monitor, and crank up its size to bigger than 4x6 > inches. It would be pixelated if the file had become reduced in pixel > density, and would look normal on the screen even blown up 2 or 3 times > if the file was still OK. > >> > >> Al Treder > >> > >> " Nothing splendid has ever been achieved except by those who dared > believe that something inside them was superior to circumstances." > >> > >> -- Bruce Barton > >> > >> On Mar 6, 2013, at 6:18 PM, "ghostfox3"<loretts54@...> wrote: > >> > >> Hello, > >> > >> I previously posted about crop to photo service changing resolution > from 300 ppi to 72 ppi on my images. > >> > >> Well ... > >> I decided to use convert& modify to change tiffs to jpegs ... and > the resolution is again changing from 300 ppi to 72 ppi. > >> > >> How can I rectify this? I have a few hundred photos to crop and > convert to jpeg. Again I have looked in all the dialogue boxes I can think. > >> > >> I am using version 7.2. Snow Leopard. iMac > >> Thanks in advance. > >> > >> Loretta > >> > > > > > > > > > > ------------------------------------ > > > > Yahoo! Groups Links > > > > > > > > > >

[ghostfox3]

Thanks all for the helpful responses. Carl - Yes .. Something is going wrong with the renaming of the processed images. It seems is is not functioning properly. I searched for the preferences to change the image info to pixels that you spoke of but cannot locate that. Ermanno - your comment that the heavy compression is a worry ... the quality is worse than the original ... should this be happening when crop for photo service is applied? Loretta --- In gcmac@yahoogroups.com, Ermanno Polli <erpol@...> wrote: > > On 07/03/13 09:21, Carl von Einem wrote: > > From the screenshot I can see that you cropped the longer side of your > > image. The new image uses the extension .tif in the file name but the > > file format is actually a JPG. > > So something went wrong with the renaming of your processed image. > > > > The term resolution has nothing to do with image size (in pixels), let's > > just have a closer look at the information in your screenshot: > > > > left image: 6.43 x 10.04 inch @ 300 ppi > > right image: 26.78 x 40.17 inch @ 72 dpi > > > > Now let's compare the width of both images using a calculator: > > left: 300 pixels x 6.43 = 1929 pixels > > right: 72 pixels x 26.78 = 1928 pixels (rounded to full pixel count) > > I may add that the pixel number hasn't significantly changed, too: > left image: 5.8 Mpix > right image: 5.6 Mpix > (This is a shortcut to your conclusions ) > > So the missing pixels could be due to the small crop at the bottom. > > Despite the .tif suffix, the right image *is* a JPEG, as you said > before, you may see it from the file size that is heavily shrinked. > > Loretta, I would worry more about this thinning (1:20 compression). You > may see the same number of pixel but the pixel contents is *not* the > same. It's "rebuilt". The quality is worse than the original. It may or > may not satisfy you.. > > > Ciao, > Ermanno > > > The "missing" pixel in the right image's width is just a rounding error > > in GC's info box: 1929 pixels / 72 = 26,79166666667 > > > > Hey, I found a bug > > > > I think somewhere in the prefs you can find an option to also display > > the pixel size in that info area. > > > > PPI reads "pixels per inch" or pixel density, it's nicely explained in > > this short article: http://wiki.panotools.org/DPI > > > > Back to the naming problem I mentioned first: I also once shot a photo > > "DSC_0307" which looks completely different?! > > Therefore I recommend to rename images to something unique like > > <your initials> + <yyyymmdd> + <hhmmss> + <original file number> > > That's a simple one line command in Exiftool which renames thousands of > > images in seconds. > > > > Carl > > > > ghostfox3 schrieb am 07.03.13 04:59: > > > Alfred, > > > > > > Thanks for your reply. I do not know where my response went that I > > referred to in my last post. > > > > > > I have a screen shot showing the image info before and after. The > > size and a resolution changes, though I have selected 300 ppi and it is > > not saving as a jpeg as I have also selected. > > > > > > > > > Loretta > > > > > > > > > > > > --- In gcmac@yahoogroups.com <mailto:gcmac%40yahoogroups.com>, Alfred > > J Treder<altreder@> wrote: > > >> > > >> Loretta, > > >> > > >> Probably nothing bad is happening. The conversion from TIFF to JPEG > > is done without changing the number of pixels or the proportions of the > > image. You said earlier that you were producing 4x6 images at 300 ppi, > > which would be a good resolution for printing. That means you are > > creating files that are 1200 pixels by 1800 pixels. After the conversion > > to JPEG, you still have a file that will print 4x6 inches at 300 ppi, if > > you direct the printing process to print the file in the 4x6 size. When > > you see an indication that the resolution is 72 ppi, the associated > > image size would be 16.667x25.000 inches. The same file can be printed > > or displayed larger or smaller, depending on how the printing or display > > instructions are set up. Graphic Converter makes this easy, generally, > > but does also allow a lot of options. > > >> > > >> I may have said too much or perhaps not understood your problem. Are > > you saying that after conversion to JPEG the resolution is at 72 ppi AND > > the size is 4 inches by 6 inches? If that were true you would have a > > problem to solve for sure. One test of that would be to look at the file > > on your computer monitor, and crank up its size to bigger than 4x6 > > inches. It would be pixelated if the file had become reduced in pixel > > density, and would look normal on the screen even blown up 2 or 3 times > > if the file was still OK. > > >> > > >> Al Treder > > >> > > >> " Nothing splendid has ever been achieved except by those who dared > > believe that something inside them was superior to circumstances." > > >> > > >> -- Bruce Barton > > >> > > >> On Mar 6, 2013, at 6:18 PM, "ghostfox3"<loretts54@> wrote: > > >> > > >> Hello, > > >> > > >> I previously posted about crop to photo service changing resolution > > from 300 ppi to 72 ppi on my images. > > >> > > >> Well ... > > >> I decided to use convert& modify to change tiffs to jpegs ... and > > the resolution is again changing from 300 ppi to 72 ppi. > > >> > > >> How can I rectify this? I have a few hundred photos to crop and > > convert to jpeg. Again I have looked in all the dialogue boxes I can think. > > >> > > >> I am using version 7.2. Snow Leopard. iMac > > >> Thanks in advance. > > >> > > >> Loretta > > >> > > > > > > > > > > > > > > > ------------------------------------ > > > > > > Yahoo! Groups Links > > > > > > > > > > > > > > > > >

[thorstenlemke]

Hello Loretta,which quality did you select. I would try to trash the prefs and use the default settings.Thorsten On 07.03.2013, at 15:48, "ghostfox3" <loretts54@monarchjourney.com> wrote:   Thanks all for the helpful responses. Carl - Yes .. Something is going wrong with the renaming of the processed images. It seems is is not functioning properly. I searched for the preferences to change the image info to pixels that you spoke of but cannot locate that. Ermanno - your comment that the heavy compression is a worry ... the quality is worse than the original ... should this be happening when crop for photo service is applied? Loretta