Identify the black and white ash field, rapid correction of color cast photos

In the color correction to digital photos, how to accurately find the image in black and white gray market is a crucial step. This article introduces a fast and convenient technique, as long as there is black and white gray image, we can use this method to help you quickly and accurately find the black and white ash yard. Note that this method is not a panacea, because not all of the images are black and white ash yard. But as long as it has, we can quickly find it.

This is an entry-level digital camera family photos, we calibrate its color, for example, to see how to find the black market, white and gray market.



Color correction before



After the color correction

Identify the black market

1, open the need to correct color photographs. Click the Layers Panel at the bottom of the "Create new fill or adjustment layer" button from the pop-up menu, select "threshold" in the pop-up "threshold" dialog box, drag the slider to the left, then the image blank. Then slowly drag the slider to the right, you will see black pixels continue. First appeared in the black pixel region is the most secret part of the image that black market. Click "OK" button, Photoshop that add an adjustment layer.



Figure 1



Figure 2

2, from the toolbox to select a color sampling tools, in the above steps to transfer out of black pixels in the area click, the image of the black mark place in the points.



Figure 3




[Next]



Identify the white field

1, the threshold adjustment layer "layer thumbnail" on the double, again open the adjustment layer dialog box, move the slider to the far right, the image will become black. Then slowly drag the slider to the left, you will see the continued emergence of the white pixels. First appeared in the white pixel area is the brightest part of the image that white field. Click "OK" button.



Figure 4



Figure 5

2, also to select a color sampling tools, marking a place in the point image of the white.



Figure 6

Find Ash

1, click the background layer, so that is active. Click the Layers Panel at the bottom of the "Create new fill or adjustment layer" button from the menu, select "solid color (solid)", fill in the color pop-up dialog box will be designated as "808080", that is neutral gray . At this point fill adjustment layer should be above the background layer, below the threshold adjustment layer. In the Layers panel, change the layer blend mode "difference (margin)."



Figure 7



Figure 8

2, double-click the threshold layer, adjustment layer dialog box open, will drag the slider to the left, then a blank image. Then slowly drag the slider to the right, you will see black pixels continue. First appeared in the black pixel region is part of the image of a neutral gray, or gray market. Click "OK" button.



Figure 9

3, select the color sampling tools, marking a place at the point of gray images.



Figure 10

Now you can adjust the layers of hidden or deleted. Finally create a new "curve adjustment layer" dialog box, click the Curve icon on the bottom right corner of the three straw, good position under the previous mark, set the black and white ash yard.



Figure 11



Figure 12








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