How it works LCH ad­just­ments

With the LCH panel, you can achieve some amaz­ing colour trans­for­ma­tions

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01 LC H but­ton Click on this but­ton to show the LCH panel if it’s not yet vis­i­ble. It’s high­lighted in yel­low when the LCH panel is open. 02 LC H panel Ini­tially, the LCH panel looks very much like the Lev­els & Curves panel which we looked at last is­sue. The de­fault view shows the Master Light­ness chan­nel with a his­togram and a curve (which starts off as a straight line), which you can ad­just to mod­ify the con­trast within the pic­ture. As with other Cap­ture NX-D pan­els, you can leave the LCH panel ‘docked’ to this side­bar, or use the menu in its top right cor­ner to ‘float’ it on the screen.

03 LC H chan­nel menu The real con­trol comes from the op­tions in the LCH panel’s drop-down chan­nel menu. You can use th­ese to change the light­ness, chroma (sat­u­ra­tion) and hue val­ues of in­di­vid­ual colours within the im­age.

04 Color Light­ness If you choose Color Light­ness, the dis­play changes com­pletely. The panel now dis­plays a spec­trum of colours with a hor­i­zon­tal line through the cen­tre. Let’s say you want to darken the blue sky in a land­scape shot. Find the same blue tone in the panel, then drag this part of the line down­wards to darken this colour range. It’s a lit­tle like a Curves adjustment, but with a hor­i­zon­tal line rather than a di­ag­o­nal one.

05 Chroma What if you want to make a colour more sat­u­rated? You need to swap to the Chroma op­tion in the drop-down menu. Again, you see a spec­trum of colours with a hor­i­zon­tal line run­ning through the cen­tre. You lo­cate the colour you want to change and this time drag up­wards. The colours in the range you’ve cho­sen are in­ten­si­fied, and you can see the ef­fect rolls off gen­tly to­wards the neigh­bour­ing colours – this pre­vents sud­den shifts in colour, and band­ing ef­fects.

06 Hue You can use the Hue op­tion to shift par­tic­u­lar colours in a dif­fer­ent di­rec­tion. Land­scapes are good ex­am­ples of sit­u­a­tions where you might want to do this, be­cause grass and leaves of­ten come out a slightly warmer colour than you ex­pect – more yel­low, when what you re­ally hoped for was a cool green. Again, you lo­cate the colour you want to change on the hor­i­zon­tal line, then push up or down to change the hue. Shift­ing the line up­wards for the green-yel­low tones moves them more to­wards blue-green.

07 Master Light­ness The Master Light­ness chan­nel isn’t used for ad­just­ing in­di­vid­ual colours. In­stead, it al­ters the con­trast within the im­age. How­ever, while it sounds the same as a reg­u­lar Lev­els & Curves adjustment, it’s not. It works only on the bright­ness val­ues in the pic­ture, not the colour val­ues, so you get the con­trast in­crease you want, but with­out the of­ten un­wel­come sat­u­ra­tion in­crease that a nor­mal Curves adjustment would give.

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