Why LR3 does not produce sRGB compatible images?

An image that I've developed in the module development will look flatter (less saturated) then exported as a JPG and displayed in a browser, if the browser is not color managed. This happens despite the fact that the image is exported using the sRGB color space.

If I find the JPG image with a color managed (with a color-plugin Firefox) browser then it looks exactly to in the develop module.

Why is this? If I select "sRGB" color space, I expect LR to not add a color profile at all and create output that will look identical in color managed and unmanaged colors browsers. I certainly don't expect the output to look flat compared to what I refine in the develop module. I chose "Only images with ICC tags." in the plugin of Firefox's color management and yet it makes LR images differently from the browser unmanaged.

It is not a question to be fooled by the black backgrounds or something like that. Please see the attached screenshot showing a) made Firefox color - managed, unmanaged b color rendering) IE and view of the c module) LR develop. Her effect is much more visible when images are viewed in large, but you can still see the differences in hue and saturation of the Green and red in the screenshot between (Firefox and LR-> left and right) managed color renderings and not managed (IE in the middle) below. Other unmanaged applications show the same rendering than IE.

The free Picasa app reach the procude output which seems identical in all browsers and view of 'Developing' Picasa. Please see the second attached screenshot which shows the same browsers in the same order. (The images seem different images in the first screen shot because I didn't spend much time in Picasa to do the update and it does not have the same control in any case).

I use LR3.2 on Windows XP.

I noticed a difference between the rendered the LR develop module and visualization on the web (or other non-color managed applications) before but always put it down to an illusion of "black background".

I find it unacceptable that I don't see what I'm going to go with a space of target of sRGB in LR unless the application used to display is managed by color. Too many people out there using color managed applications, and the Picasa example shows that it is possible to have a WYSIWYG approach.

Do you mean that a screen calibration does two things:

(a) change the LUT so that colors change immediately for all applications, and

(b) provide a color transform space?

That's exactly what screen calibration. It has two components. One is the calibration of the gamma response curve (i.e. the LUT). This influences only the answer of contrast of your monitor and the white balance. This affects all applications, but does not color correct, only good neutrals and gamma correct response. Secondary, it creates a profile this color managed apps can use to translate the color so that the color displayed is the one that is specified. Consider now what happens when you have an image containing the sRGB tag (or any other color space). sRGB specifies a tone curve of response (different from the gamma 2.2, generally most of the screens!) and the three primary colors. A managed application of color will take these numbers and translate them into equivalent colors in the monitor profile and then to send the graphic card which applies to the LUT and sends to the screen. This translates into a change in the numbers of colors (R, G, triple B) and a change of luminance but causes the exact colors (as long as you're not outside the range monitor) as you wish. When you use an unmanaged application the R, G, B calues in the original file are sent directly to the card, the LUT is applied and the image is displayed. This ALWAYS results in the wrong color and give a color at random on each monitor there basically. What you see has little to do with what others see. If the control in a browser unmanaged is completely useless. Now, if you have a very good monitor with sRGB responses and which is well calibrated, you might get something acceptable close to the appropriate color. Monitors very few low-end (like most laptop screens) are this way and have a smaller than sRGB range, having a desaturation result. However much more end monitors (and even a certain lower end of DELL and others) have ranges closer to adobeRGB as sRGB and they will show an increase in saturation in unmanaged applications. So now if you are targeting the general public who is not color manage (even if they do more with the prevalence increased a lot of Firefox and Safari, Chrome runs on Mac OS X) you can just control what people see. You certainly can't approach using unmanaged applications yourself. It's actually the worst you can do. Greeting take, is that although sRGB is a standard, individual screens would deviate a little from him. Your screen is clearly as you see a su nonmanaged apps with sRGB files change. A slight change however is normal because sRGB is not gamma 2.2, but a change in saturation indicates your screen is different than sRGB.

If the strategy is to a. calibrate and know your own screen and control your editing/viewing environment and the luminance of the screen, b. export only to sRGB, and C. use only the applications of color management to check the color of your files exported.

This strategy will be the average viewer see something close to you. Individual viewers could deflect a bit if. Nothing you can do about it.

Tags: Photoshop Lightroom

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