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Sally Jane Photographic ArtAdobe Photoshop Tutorial |
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RAW! |
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Getting Started with RAWThe HSL/Grayscale tools.(Hue, Saturation and Luminance).
You will notice that initially all the sliders are in their default position in the centre with values of 0. At the top there is a greyed out 'Default' marker. as soon as you adjust any of these sliders that marker becomes highlighted and active. By clicking on it you can automatically reset all the sliders to 0. There is also a check box with 'Convert to Grayscale' next to it. checking this box will, as it suggests, turn everything into monochrome black and white. You will not lose the colour channels though, so you can still change the values of the various channels even though the image appears black and white. We will see how this works further into the tutorial.
Hue slidersLets play around with the hue sliders in this image of some crocuses, below.
In this image we have some nice purple petals. If I select the purple slider and move it to the left towards the blue end you will see the purple petals turn blue but the other colour's in the image are largely unaffected. Similarly, if I had chosen to move the slider to the right towards the magenta end the petals would have gradually turned magenta.
Now I'll show you what effect you can get using the grey scale option. This time I'm going to use the anemone photo again. Here it is in full colour.
Converting to GrayscaleChecking the 'Convert to Grayscale' box turns it into a black and white image but notice all the colour sliders are still active, however, they have changed. You now only have one tab called 'Grayscale mix'. Now the sliders either darken or brighten that particular channel.
I chose this image because it has clearly defined colour's so great for this kind of demonstration. I'm going to increase the drama in this shot by darkening the petals by moving the blue slider left, and lightening the centre of the flower by moving the yellow slider right. To give the yellow stamens more contrast against the green base I will also darken the greens slightly. quite a difference I'm sure you will agree. Now let's see what happens if a reverse what I did by lightening the blues and darkening the yellows. A completely different image appears.
Clicking on Auto provides you with Adobe's suggestion for the image and is often an improvement on the Default as it generally provides settings that give more contrast. ACR can also create Sepia images and to do that you will need to go to the 'Split Toning' tab after converting the image to grey scale. I will discuss more on that in the 'Split toning' tutorial. Saturation slidersNow I'll take a look at the Saturation sub tab. I'll have to uncheck the 'Convert to Grayscale' check box and click on 'Default' to reset everything first and then click on the 'Saturation' sub tab to bring up the saturation controls. I will stick with this same anemone image. Once again we have the same colour options. I am going to increase the saturation in the blue petals.
These petals have a purplish tint to them so I increased that slider to. The petals are now really brilliant but none of the other colour's have been effected in the image. Now I'll show you what happens if we decrease the saturation of these colour's completely.
The petals have turned to grey scale. while everything else is in full colour. This provides a very easy way of producing a selective colour black and white shot. By moving all the sliders except the blue and purple to the far left and leaving the blue and purple at their default 0 setting I get this image below.
So simple and not a layer mask in sight. The Luminance Controls.
Once again I'm back with this image and by default, when you click on the Luminance tab all the sliders are in their Default position of 0. Just like before I am going to show the effects on these petals by increasing the luminance on the Blue slider all the way to the right.
The petals have become very pale and light in shade. Conversely, if I move it all the way to the darker end, left the petals become very dark, image below.
That is all there is to this HSL/Grayscale window. A really very intuitive set of tools but massively versatile and adaptive. In my next tutorial I shall discuss the Split Toning tools.
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Back to RAW introduction, ACR Tools and Interface Explained ACR Sharpening & Noise Reduction ACR Top Menu Bar (Crop, rotate and blemis removal etc) |
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Recommended Further Reading for PhotoshopReturn to introduction & contents page
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Tel. 07956 448690 e-mail - Images@sally-jane.com |
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This tabbed window allows you to fine tune the settings you made in the Basics window. Here you can deal with the colors individually rather than applying the changes across the whole image. You will notice that there are three sub-tabs in this window. One for Hue which changes the shades of various colors, one for Saturation which increases or decreases the strength of the various colour's and one for luminance that increases or decreases that colour's brightness. By default when you go to the HSL/Grayscale tab you will be presented with the Hue window first. 
