PS Wedding pull map and background replacement

Wedding Drawing and background replacement is a litmus test of whether a user has an in-depth understanding of a range constituency, as it involves the transparency and image background of a wedding gown.

Despite the many techniques that will be discussed in the next chapters of this book, I decided to put this case here-the 1th chapter of the book-to discuss. The core of this example is to teach readers how to modify a channel so that it gradually meets our needs for complex and precise choices. In this section, readers will be exposed to the vast majority of options for creating and modifying tools, from pen tools to various painting tools.

Preparatory work

The 1th step the original image is a bridal fashion photo at a fashion conference. Because of the light reason, the image appears to be somewhat partial color. Because the bias is not too serious, you can use the Auto Color command in the image → adjust menu to correct it nicely.

Step 2nd Next, make an initial channel.

Observe the red, green, and blue 3 color channels of the image. Although you can start from the red, green, blue 3 color channels of any copy to begin to modify, we still feel the use of the image of the "gray" channel more in line with the translucent features of the wedding, you can use the "calculation" command, according to the image set to get the "gray" channel "ALPHA1

The 3rd step sets the black and white field of the "ALPHA1" channel image.

Use the "levels" command to set the black and white fields of the image, which will ensure that the background is completely removed and the white is preserved. The above belongs to the preparatory work.

The 4th step because it is the scene of the fashion show, you can see that the background is not simple. The following figure indicates the 3 areas in the ALPHA1 channel where the eraser can be wiped completely.

Sketch Outline

Step 5th Use the Path tool to modify the "ALPHA1" channel.

Models of the body, skirts and other than the wedding, is completely opaque, it is best to use the pen tool carefully outline the outline, and then converted to the selection fill white. When converting, using a feather value of 0.5 pixels makes the contour boundary softer, which is why you don't use the fill path directly.

The Brightness/Contrast tool in the toolbox

You know, in the toolbox, there's a tool that serves as the brightness/contrast command.

This tool is a sponge tool. When editing a single channel, its "Go-color" mode plays a role in reducing the contrast of channel images, which tends to be 50% shades of gray (128 levels); its "Add color" mode plays a role in increasing the contrast of channel image, so that the light and dark tones tend to be black-and-white.

The 6th step is to use the sponge tool, set the mode to "add color", by increasing the contrast, modify the model headdress and leg edge. As you can see, highlight the highlight area and darken the residual background near the hand. In this case, the use of sponge tools is better than the use of deepening and Dodge tools.

Removal of mottled background

Can see, through the translucent wedding veil, faint showing the background of the figure, how to remove these figures?

7th step in this case, this is one of the most challenging tasks for the operator to use tool skills and patience.

① can reverse-phase images by using the "reverse-phase" command. Because of the different sensitivity of the human eye to the light and shade, some areas that are easily overlooked can be found. For example, the darkened area, where we think it is dark enough, often finds no erasure or uniformity after the inverse phase.

② to see which areas need to be modified. Photoshop is a pixel-based software that does not distinguish which pixels "useful" need to be retained and which pixels "useless" need to be removed. The decision of choice rests with the operator.

③ has no tools to Pauta, to be adept at synthesizing tools. For example, the Clone Stamp tool retains details and textures, but is slightly stiff; the Healing brush tool and the repair tool reconcile textures and shades, but do not work well with edges; the fade-and-burn tool has a better effect on changing shades and shades, but you should be aware of setting a smaller exposure value.

The perfect channel is the equivalent of a cooking knife, with a carefully crafted channel that succeeds in half. As shown in the figure is the modified "ALPHA1" channel image.

Using channels to modify images

If the call just modified the "ALPHA1" channel directly remove the mottled background area, can not be removed. Consider using this "perfect" "ALPHA1" image to modify the corresponding area of the image.

Step 8th Use the Select all, copy, and Paste commands to paste the ALPHA1 image as Layer 1 and change the layer mode to brightness.

As you can see, the shading in this area of the image meets the requirements, but the color is inconsistent.

Remove the exception color with the color substitution tool

The 9th step is to edit the background layer. Using the color substitution tool, set the mode to Hue, select the foreground color of black, and smear in the color anomaly area until the exception color disappears.

Step 10th use new layer mask on the Layer menu, select Hide All, and create a black mask for layer 1. Because Layer 1 is hidden, the user can see the area in the background layer where the color has just been erased.

Select the Brush tool smudge, which will mask the defect of the background layer using the pixel "Layer 1".

Step 11th merges the layers. Use the "ALPHA1" channel to end changes to the background layer.

Replacement of the background

The 12th step drags into a "castle" image as the background. However, this layer does not have to be placed below the original image. Load the ALPHA1 channel as a selection, use Create layer mask, select Hide selection, and the corresponding area on layer 1 is hollowed out, exposing the background layer of the model.

Loading a selection directly and wiping it with an eraser is not an appropriate practice in most cases. Creating a layer mask preserves the possibility of more changes.

After the replacement is complete, there is nothing to be done, such as the color and hue of the wedding dress and the castle is not naturally fused, need to make some changes to two images.

Castle color dimming, saturation increase may be more suitable for the overall image of the atmosphere. But there's no fixed pattern. The following approach is only to provide a way of thinking.

Step 13th Click the previous thumbnail of the layer 1 thumbnail. Use the average filter in the Blur filter group. This filter can "average" the entire layer as a color. Use the Eyedropper tool to set the foreground color to that type.

Step 14th opens the "Fade" command on the Edit menu and changes the mode to "strong light", which gives the castle a dim but highly saturated effect.

The 15th step switches to the "background" layer, loading the "ALPHA1" channel, reversed-phase selection, using the "Fill" command, the color of the "front color" (just the color chosen by the straw), the pattern is "color", making the translucent wedding dress a faint blue.

Summarize

As a centralized walkthrough of a channel operation, the reader can try from the contour selection to the range selection, from the selection tool in the toolbox to the various image adjustment commands, from the load selection to the various operations that use the mask. It can be found that the channel operation is the operation of a grayscale image.

If we were to say this before, we also consider selection and image adjustment as two separate tasks. So now, you should know that this is a matter of fact.

The most important achievement of the channel is that the image processing and selection of the two previously not coherent tasks have become image processing work.

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• PS Pull Map Tutorial