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A Photographers View of Gimp 2.6 | Stephen DeLear | 05 Oct 19:28 |
A Photographers View of Gimp 2.6 | Alexandre Prokoudine | 05 Oct 20:30 |
A Photographers View of Gimp 2.6 | Liam R E Quin | 06 Oct 02:43 |
A Photographers View of Gimp 2.6 | Liam R E Quin | 08 Oct 04:17 |
A Photographers View of Gimp 2.6 | Omari Stephens | 09 Oct 07:23 |
A Photographers View of Gimp 2.6 | Liam R E Quin | 09 Oct 17:05 |
A Photographers View of Gimp 2.6 | Guillermo Espertino | 05 Oct 20:34 |
2008-10-05 19:28:41 UTC (over 13 years ago)permalink
A Photographers View of Gimp 2.6
Just some thoughts on Gimp in general and 2.6 in particular.
Layers: Somebody hasmisplaced a box. Where has the layersstack window gone? I can’t turn on thepane under either layers, image or view. I can create a new layer but not see what layers are on the image.
Save As: I don’t seem to be able to move up a level thendown into a new folder on a save as. This is an issue as I’m taking tiff’s from one location, editing themthen saving as jpg into a separate folder for ftp upload. Optimally, open (and save) and “save as”would set their default folders independently as the last folder used for thatoperation.
Unsharpen Mask: TheGEGL unsharpen mask feature does not use standard terminology. I have no idea how to set this.
General Wish List:
Locate Center Point: Reviewinga 22MP image a 100% means navigating an image with an equivalent size ofseveral feet. What would be nice is someway to mark the exact center of the image, where the central AF point fell, sothat it can be quickly navigated to at 100%.
Scale to File Size: Many stock sites require an image to be upsized. For example Alamy requires an uncompressedfile size of 48megs from a file saved as a 8bit .JPG. It would be useful to be able to set in anuncompressed file size and have the GIMP resize to be exactly that size.
View at Simulated Output, 150, 300 or 500 DPI: Back in the days of film we would havelaughed at anybody getting spun up that an image was not sharp when enlarged tomultiple feet from a 35mm or smaller frame. When scanned, we edited out images at output size, and used 100% viewfor retouching. Everybody needs a littlereminder that the question how will this look outputted, not how will this lookon a theoretical billboard.
High Dynamic Range Imaging: Which will require
greater then 8bit color. Mathematicallyputting 3 or more images bracketed on a tripod together for an expanded tonalrange. Currently can be done natively inCS3/CS4.
greater then 8bit color. Mathematicallyputting 3 or more images bracketed on a tripod together for an expanded tonalrange. Currently can be done natively inCS3/CS4.
Color Palettes: Digital Cameras tend to output in only acouple of color palettes. Alien SkinsExposure 2 plug in can simulate a number of old film palettes. It would be nice to be able to do in the opensource world (patents allowing). Atleast from Kodak, datasheets including gamma curves of every film they’ve evermade are online (RG25 FTW).
Noise Reduction: Theoverexposed look is in for photography lately as dark areas of an image pick uppatterning from the digital sensor (i.e. noise). Back in the days of film seeing grain in animage enlarged to several feet would be a “live with it”. Today a number of companies will rejectimages showing ANY noise at 100%. Plugins such as noise ninja are quite popular. Would be nice to have a specific noisekilling enhancement in GIMP.
2008-10-05 20:30:09 UTC (over 13 years ago)permalink
A Photographers View of Gimp 2.6
On Sun, Oct 5, 2008 at 9:28 PM, Stephen DeLear wrote:
Unsharpen Mask: The GEGL unsharpen mask feature does not use standardterminology. I have no idea how to set this.
Let me give you an idea: edit the source code and send us a patch('diff -u' is your friend)
You want this file:
:-)
High Dynamic Range Imaging: Which will require greater then 8bit color.Mathematically putting 3 or more images bracketed on a tripod together foran expanded tonal range. Currently can be done natively in CS3/CS4.
Qtpfsgui is your friend :-)
Noise Reduction: The overexposed look is in for photography lately as darkareas of an image pick up patterning from the digital sensor (i.e. noise).Back in the days of film seeing grain in an image enlarged to several feetwould be a 'live with it'. Today a number of companies will reject imagesshowing ANY noise at 100%. Plugins such as noise ninja are quitepopular. Would be nice to have a specific noise killing enhancement inGIMP.
Gimp 2 6 For Photographers Online
You mean you want all those noise reduction plug-ins and scriptsfloating around GIMP in the bundle or some particular one? Could youprobably be more particular about that? :-)
I'm not saying GIMP developers will do what you say (I'm not inposition to make any claims regarding development process), but atleast you could start with review of existing solutions for GIMP(GREYCstoration, Wavelet Denoise etc.) with samples andrecommendations. That would be a good start. Just telling peoplesomething is missing and not providing enough information is not quitehelpful ;-)
Alexandre
2008-10-05 20:34:36 UTC (over 13 years ago)permalink
A Photographers View of Gimp 2.6
Stephen:
- GEGL Unsharpen Mask: AFAICS, the values are the same of the regularunsharp mask filter, but it has a larger scale. It allows extreme values (iguess it makes sense for really high resolutions)
- View at Simulated Output: That's what the 'point to point' option allowswhen deactivated.
- Noise Reduction: There are several great plugins for noise reduction:Greycstoration and wavelet denoise being a couple of them (Greystoration isreally impressive).
- High Dynamic Range Imaging: There is a exposure blending script thatallows too merge 3 different exposures in one image, The resulting imageisn't an HDRI though.
2008-10-06 02:43:34 UTC (over 13 years ago)permalink
A Photographers View of Gimp 2.6
On Sun, 2008-10-05 at 10:28 -0700, Stephen DeLear wrote:
?Just some thoughts on Gimp in general and 2.6 in particular.
Some people have already replied, here are some more thoughts fromanother photogtrapher :D
Layers: Somebody has misplaced a box. Where has the layers stackwindow gone? I can’t turn on the pane under either layers, image orview. I can create a new layer but not see what layers are on theimage.
control-L will get the layers dialogue back (at least on Linux),or you can go to the Windows menu and it's under Dockable docks.By default it should be visible in one of the docks, though.
Save As: I don’t seem to be able to move up a level then down into anew folder on a save as.
I think a LOT more details are needed here in order to help... forexample, which Linux distribution are you using, and which version ofgtk?
for me, I can do this -
(1) control-shift-S (or File->Save AS)(2) Save Image appears
(3) I can click on Browse for other folders(3) I see immediately under the Browse for other folders label I clicked on,
< [lee] [eos] [2008-10-01-peterborough](4) I can click on [eos] to go up to that directory.
(1) control-shift-S (or File->Save AS)(2) Save Image appears
(3) I can click on Browse for other folders(3) I see immediately under the Browse for other folders label I clicked on,
< [lee] [eos] [2008-10-01-peterborough](4) I can click on [eos] to go up to that directory.
Unsharpen Mask: The GEGL unsharpen mask feature does not use standardterminology. I have no idea how to set this.
Youi'll have to experiment. By 'standard' do you mean that thereis an ISO specification for unsharp mask, or do you mean you wantthe labels to be the same as some piece of proprietary softwareor other, or that you want them to be the same asFilters->Enhance->Unsharp Mask
?
?
In general, be specific with suggestions, e.g. 'it might beclearer for people who grew up using other software if theterms were Amount and Radius rather thn Standard Deviation andScale', or 'ISO 30196:2006 Terminology for Graphics' says thatthe terms should be Setting One and Setting Five; conformance withthis specification would help US Government adoption' :)
General Wish List:
Locate Center Point:
Reviewing a 22MP image a 100% means navigating an image with anequivalent size of several feet. What would be nice is some way tomark the exact center of the image, where the central AF point fell,so that it can be quickly navigated to at 100%.
?Middle-click on the middle of the horizontal scrollbar, and againon the middle of the vertical scrollbar, and that will get you roughlythe the middle of the image. I don't know which camera you're using,but mine has multiple AF points, and I can use a wheel to choose whichone is active; it's conceivable to me that a plugin could be written toextract this information from the EXIF data (it's probably different forCanon, Olympus, Nikon, Pentax, Mamiya, Phase One, etc) and take you tothe point or points that the camera thought were in focus.
Scale to File Size: Many stock sites require an image to be upsized.For example Alamy requires an uncompressed file size of 48megs from afile saved as a 8bit .JPG. It would be useful to be able to set in anuncompressed file size and have the GIMP resize to be exactly thatsize.
I find with Alamy the limit is that your compressed file must beno larger than 25 MBytes. So I use Save As, choose JPG, and thenturn on the image preview, and adjust (s l o w l y) the settingsuntil I get just under 25 MBytes. If your image is too large or toosmall, the upload applet will flag an erorr.
But there are multiple parameters you can tweak, so it's not clear tome how this could be automated. For example, sometimes I think I canget away with reducing the quality and increasing Smoothing to reducethe artefacts, and sometimes I need to use 1x1,1x1,1x1 subsampling topreserve reds.
View at Simulated Output, 150, 300 or 500 DPI
What would this do technically, exactly?
High Dynamic Range Imaging: Which will require greater then 8bitcolor.
You can actually do HDR work with GIMp today. However, more-than-8-bitcolour is in progress; it's a large amount of engineering, and is notyet complete.
Color Palettes: Digital Cameras tend to output in only a couple ofcolor palettes. Alien Skins Exposure 2 plug in can simulate a numberof old film palettes. It would be nice to be able to do in the opensource world (patents allowing). At least from Kodak, datasheetsincluding gamma curves of every film they’ve ever made are online(RG25 FTW).
GIMP's colour pallette support is currently mostly designed for indexedimage formats such as GIF. But it would certainly be possible to writea plugin to say, 'Change image A to use only the colours from image B';ImageMagick supports this operation today. You could also experimentwith Colours->Sample Colourise (or it might be called Colors->SampleColorize, depending on where you live).
Noise Reduction:
One approach here is to scale the image up, e.g. 300%, then do a blur,then scale down again (use Cubic to avoid exaggerating noise artefacts)and then use Sharpen (not unsharp).
With some cameras this may work best if you use colours->decompose, andthen blur only one of the resulting layers, and then recombine; I find aselective gaussian blur can work well.
There are quite a few noise plugins floating around, but I haven't sofar found any better than scale up, blur, scale down.
Hope this helps. Good luck with Alamy :-)
Liam
2008-10-08 04:17:41 UTC (over 13 years ago)permalink
A Photographers View of Gimp 2.6
On Sun, 2008-10-05 at 10:28 -0700, Stephen DeLear wrote:
?
Layers: Somebody has misplaced a box. Where has the layers stackwindow gone? I can’t turn on the pane under either layers, image orview. I can create a new layer but not see what layers are on theimage.
A brief update --
Under Windows Vista it seems you may need to click 'Auto' in the Imagedock (you can find this under Window->Dockable Windows, if yuo don'thave it docked already).
If you don't do this, you may find the layers dialogue is always empty,and some other dialogues don't work properly -- because the active imageisn't getting set I think.
Liam
2008-10-09 07:23:34 UTC (over 13 years ago)permalink
A Photographers View of Gimp 2.6
Stephen DeLear wrote:
::snip? SNIP!::
First off, just to be clear, what OS are you on? The vast majority of gimp users are Linux/some-form-of-UNIX users, so that tends to be what we (or, at least, I) assume. The issues you're facing sound like you might be using a less-tested configuration, though.
::snip? SNIP!::
First off, just to be clear, what OS are you on? The vast majority of gimp users are Linux/some-form-of-UNIX users, so that tends to be what we (or, at least, I) assume. The issues you're facing sound like you might be using a less-tested configuration, though.
Locate Center Point: Reviewing a 22MP image a 100% means navigating an image with an equivalent size of several feet. What would be nice is some way to mark the exact center of the image, where the central AF point fell, so that it can be quickly navigated to at 100%.
Click and drag on the 'move' icon in the lower-right corner of the image window.
Scale to File Size: Many stock sites require an image to be upsized. For example Alamy requires an uncompressed file size of 48megs from a file saved as a 8bit .JPG. It would be useful to be able to set in an uncompressed file size and have the GIMP resize to be exactly that size.
This seems incredibly silly and naive. First of, as JPEG is a lossless format, different images will end up at different pixel sizes to reach the same file size. I mean, if you've got a low-key image that's predominantly black (or some other image that JPEG works well on), you'd have to make the thing enormous to hit that. Secondly, upsampling the image doesn't increase the amount of information in the image, so you're essentially just wasting disk space for no gain. If there were a minimum pixel size, I could see upsampling the image to meet that. A minimum file size, though? No way.
Are you sure they want you to upsample the image to meet the file size requirement? Are you sure it's not just the case that they want images from a medium-format digital back or something like that?
--xsdg
2008-10-09 17:05:10 UTC (over 13 years ago)permalink
A Photographers View of Gimp 2.6
On Thu, 2008-10-09 at 05:23 +0000, Omari Stephens wrote:
Stephen DeLear wrote:
[...]
[...]
Scale to File Size: Many stock sites require an image to be upsized. For example Alamy requires an uncompressed file size of 48megs from a file saved as a 8bit .JPG. It would be useful to be able to set in an uncompressed file size and have the GIMP resize to be exactly that size.
This seems incredibly silly and naive.
Regardless, this is what they require.
First of, as JPEG is a lossless format,
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I think you mean 'lossy' here.
Alamy (for example) requires a minimum uncompressed file size of48 MBytes and a maximum compressed file size of 25 MBytes. Theyhave instructions on how to upscale images. See for examplehttp://www.alamy.com/contributors/stock-photography-digital-cameras.asp
If you want to go on a crusade against stock image companies,that's fine :-)
Liam (also at CSAIL by the way!)
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* Toolbox Menubar Removed
* Toolbox and Docks are Utility windows
* Ability to Pan Beyond Image Border
* Renamed Dialogs menu to Windows.
* Keep a list of recently closed Docks and allow reopening them.
* Make opening images in already running GIMP instances work better on Windows.
* You can now enter the image zoom ratio directly in the status bar.
* Added support for using online help instead of a locally installed GIMP Help package.
* Make it possible to lock tabs in docks to prevent accidental moving.
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