Photoshop Image Processing Technology (II.)

1. Color Replacement tool in PS

Open foreground color picker, set Photoshop CS6 foreground color

1."mode" option to adjust the blending mode of the replacement color and the Basemap

Selection mode: Hue, after applying the effect (hue is to adjust the form of image color, get different color images)

Selection mode: Saturation, after applying the effect (saturation is to get new and old different images; light and shade is the intensity of lighting in the image)

This saves you time by eliminating the steps for outlining the selection.

2. type of image, bit schema and vector image

Images are recorded, processed, and saved digitally, so images can also be said to be digitized images. The image type can be divided into the following two kinds: vector image and bit schema image.

(1) vector type image

vector images record image content in a mathematically descriptive way. Its content is dominated by lines and color blocks, such as the data for a segment that only needs to record the coordinates of two endpoints, the thickness and color of the segments, and so on. As a result, the file occupies a smaller capacity and can easily be scaled up, scaled down, or rotated, without distortion and can be used to make 3D images. However, this image has a disadvantage, that is not easy to make a rich hue or color changes too much of the image, and the graphics are not very realistic, not as accurate as the photo description of the natural landscape, but also not easy to exchange files between different software. The software for making vector images is freehand, Illustrator, CorelDRAW, AutoCAD and so on.

(2) bit schema image

Can make the color and tonal changes rich image, can realistically express the natural landscape, but also can easily exchange files between different software, this is the advantage of bit schema image. The disadvantage is that it is unable to make real 3D images, and the image scaling and rotation will produce distortion, while the file is large, memory and hard disk space capacity requirements are also high. Bitmap images are made up of many points, called pixels (pixel). When a large number of dots (i.e. pixels) of different colors are grouped together, a complete picture is formed. Bitmap image when you save a file, it needs to record the location and color data for each pixel, so the more pixels (that is, the higher the resolution), the larger the file and the slower the processing speed. But because it can record each point of data information, so can accurately record the rich color of the image, can realistically represent the nature of the image, to achieve the quality of the photo-like. Adobe Photoshop is a bit-schema-oriented image software that uses a bitmap image to store images, but it can exchange files with other vector image software and open vector images. When you make Photoshop images, the higher the number and density of pixels, the more realistic the image is.

3. Marquee Tool (M)

You can draw a square or a circle by pressing the SHIFT key;

If you press the ALT key to draw a rectangle or circle from the center point;

If you press Alt+shift, you can draw a square or a circle marquee from the center point.

If you want to deselect the Marquee tool, select Select/Deselect selection or press Ctrl+d.

Press the Alt+delete key to fill the foreground color, and press Ctrl+delete to fill the background color.

4. Select a specific color range

As a result, Photoshop offers a more resilient alternative to magic wand tools--selected with a specific color range. As a result, Photoshop offers a more resilient alternative to magic wand tools--selected with a specific color range.

Method: Selection, Color range

In the middle of the Color Range dialog box, there is a preview box that shows the range of images that are currently selected. If no selection is currently made, the entire image is displayed. The two radio buttons below the box are used to display different previews.

A, Image: When you select this radio button, the entire image is displayed in the Preview box.

B, Selection (select range): When this radio button is selected, only the selected range is displayed in the Preview box.

Open the Select drop-down list box and select a way to select a color range.

A. When you select the sampled Colors (sampled color) option, the user can use the eyedropper to take the color. When you move the mouse pointer over the image window or in the preview box, it becomes the eyedropper shape, and you click to select the current color. It can also be used with the Color tolerance slider. The slider can adjust the color selection range, the larger the value, the more approximate color is included, the larger the range is selected.

B. Select the red, yellow, green, cyan, blue, and magenta options when you can specify 6 colors in the selected image, the slider does not work.

C. Select the highlight, middle, and dark options to select an area of different brightness for the image.

D, select the Out of gamut (overflow) option to choose some colors that cannot be printed. This option is available only for images in RGB mode.

Opens the selection preview drop-down list box, from which you select a selection of how the range is displayed in the Image window.

A, none (none): Indicates that the preview is not displayed in the image window.

B, Grayscale: Indicates that an unchecked area is displayed in a gray tone in the image window.

C, Black Matte: Indicates that an unchecked area is displayed in black in the image window.

D, White matte: Indicates that an unchecked area is displayed in white in the image window.

E, quick mask: Indicates that an unchecked area is displayed in the Image window with the default mask color.

You can use the other two eyedropper buttons in the Colorrange (Color Range) dialog box to increase or decrease the selected color range. When you want to add a selection, select the eyedropper with the "+" number, and when you want to reduce the selection, select the "-" eyedropper, and then move the mouse pointer to the preview box or the image window to complete the click.

Select the invert (invert) check box to invert the selection and non-selection range, and the effect is the same as clicking the Select/inverse command.

When everything is set, click the OK button to complete the range selection.

Note: The Load and save buttons in the Color Range dialog box can be used to mount or save settings in the Color Range dialog box. The saved file name extension is. AXT.

Quickly get the appropriate color of the selection, let the later use the Lasso tool processing ...

(3) Control selection range

Intersect select range, press Shift+alt to select the same function

Copy the selection, press the Ctrl+alt key, and move the mouse

according to Ctrl+t , the selection can be freely transformed, scaled, rotated, chamfered, distorted, perspective, etc.

5. Content-Aware mobility tool

To convert a plot to a selection on the periphery of a character.

In the mode "move", hold down the left mouse button and drag the character to the desired position

In the mode "extend", hold down the left mouse button and drag the character to the desired position.

6. Cutting tools and perspective trimming tools

The crop tool crops the image in a way that changes the size of the canvas, while the perspective crop tool crops the image in a way that changes the size of the image.

7. Use of the filter "Convert to Smart filter"

Photoshop CS6 "Convert to Smart filter" uses: Because the normal filter function is executed, the original layer is changed to the effect of the filter, if the effect is not ideal to restore, only from the history of the return to the execution. And the Smart filter, like to add style to the layer, in Photoshop CS6 "layers panel", you can delete this filter, or re-modify the filter parameters, you can turn off the filter effect of the small eyes and display the original, so it is convenient to modify again . This is the benefit of the Photoshop CS6 smart Filter

After importing footage, click Filter, convert to smart Filter

Tick the selection out selection

Other, to open the footage, do not need to open the material through the "file-open" mode, just open the PS, and then drag the picture on the desktop into the PS, the footage is now open on the layer above, to save time.

Photoshop Image Processing Technology (II.)