Photoshop Tips Collection (157-167)

157. Image file to lose weight

Resize the image: Larger images take up more disk space because it has more pixels. However, if you try to use the WIDTH and HEIGHT attributes in the markup to resize the image, you will be disappointed because that does not save download time.

Use thumbnails: By setting a small version of the image, the user clicks on it to see the full image. But you should indicate the full size of the picture next to it so that the user can decide whether to view the full picture. Storing GIFs in JPEG: JPEG compression is most suitable for images with many colors.
Increase the compression ratio: If it is a JPEG file, you can re-save it with a higher compression ratio to reduce the file size. But don't forget the price: Higher compression reduces image quality.
Reduced Color Depth: The color depth of a GIF image is up to 8 bits (256 colors). Each pixel contains less information and the final file will be smaller.

Adjusting the contrast level in the image: Most graphics software provides retouching options such as gamma correction and highlight/midtone/shadow to change the contrast within an image. Shrinking these values ​​usually reduces the file size.
Suppression Jitter: Jitter refers to using colors in an existing palette to approximate colors that are not in the palette. Jitter increases the GIF file size.

158. How to lose weight for pictures with fonts

Many times we like to use Photoshop's "font" feature to add a few words to the picture, making the picture more beautiful. However, this finishing touch may make the occupied space increase in vain from tens of K to a capacity of M counts. Strangely, why are the changes so sudden?
In fact, in the face of this situation, after you merge layers, the use of other tools such as ACDSee to change the format or save as other formats and then delete the original picture naturally becomes smaller! Generally saved as .jpg is more appropriate.
If the quality of your image is not too high, you can first merge the layers and turn it into an index color (below 256 colors) or control the size based on the .jpg format.

159. Document weight loss

For example, if you save a *.TIF file in Photoshop, how would a 100 K file become 3M? In fact, as long as you change the format, you can delete the original file.

160. What format file is scanned in black and white?

If it is a chart, use gif, if it is a photo, jpg. Black-and-white pictures are recommended to be converted to grayscale first, and then saved as gif; if the color is below 256, the best with gif - the file size is small, without losing quality; if it is true color, it must be jpg.

161. The transition from reality to imaginary

How to achieve the opacity of a selected area or layer in Photoshop gradient from high to low? It is as simple as feathering a constituency or doing a layer mask, creating a new layer to make it a black-and-white gradient, and then merging the layered screens that require effects.

Gradient masks can also be used to transition this area or layer from the top for 100% opacity to the bottom 0%. These percentages can also be changed at will.

162. Image Mix Overlay

In advertising design, image synthesis and overlay are often used. In fact, the implementation of the function is very simple:
Open the main image as a background image.
Then open another figure, Crtl + A select, Crtl + C copy.
Back to the main image, Crtl+V is pasted. A new layer appears here. In this layer, the selection mode is Multiply or screen. At this point, the two images have been stacked together. Finally adjust the position of the image to the best.
The effect of art is not there. You can also clone your twins!

163. How to Draw a Dotted Line in Photoshop

Double-click on the brush you want to use, and change the 100% to a larger value at Spacing. You'll leave gaps, and you'll use Brush to paint. First draw the path, define Brush:Space is set to more than 200, open the Path panel - Storke Path. How to overlap two equally-sized images with translucency?
In the layer panel: You can change the transparency of the upper layer, or change the blend mode of the layer.

164. Deflashing

You can try to use the path tool or magic wand to outline the outline of the image, then use the "choose" "feather", and then invert and then delete, may be better.

165. How can I store a delimited figure without the background behind

"Copy" the selected area of ​​the dotted line, then "Paste", then delete the bottom layer, and finally "Ctrl+S". Note that the storage format should be .PSD format or .EPS format or .AI format.

166. Quick Fill

Open the picture to be filled, execute Ctrl+A, select all images, execute “Edit” → “Define Pattern”, define the picture as a pattern and then execute “Edit” → “Fill”.

167. Remove the texture of the picture

(1) Picture of a picture or magazine

In general, the texture is caused by the rough texture of pictorial or magazine printing paper. The value of dpi should be set higher when scanning. The higher the resolution, the larger the scanned image and the higher the relative fineness. Higher resolution will create good conditions for the next image reduction and filter processing.

(2) Adjust the picture to a suitable size

In the "Image" menu, select the "Image Size" option, pop-up "image size" dialog box, determine the limit ratio under the option to check the state, in the pixel size will Width behind the pixels to percent. At this point the Width value becomes 100. At this point, you can enter the desired percentage value and reduce the image size. The reduced texture has been slightly weakened.

(3) Elimination of moire with Gaussian

Select "Display Channel" in the "Window" menu. The channel panel appears. The four channels are RGB, Red, Green, and Blue. Select the Red channel and the picture is displayed in black and white. Select "Fuzzy" → "Gaussian Blur..." in the "Filter" menu. The Gaussian Blur dialog box appears. Adjust the radius value to control the range of blur, so that the texture in the Red channel can hardly be seen, and the content of the picture is slightly blurred. Then follow this method to adjust the Green and Blue channels, respectively, so that the texture in the channel disappears. Finally returned to the RGB channel, when the picture has no interference with the texture. Note: The value of Radius must not be set too large, so as to avoid causing too much influence on the RGB channel to make the picture obsolete.

(4) Adjust the final effect

If the texture is too sharp to cause the radius value to be set larger, the picture in the RGB channel will be somewhat blurred. If you want to make the contents of the picture clearer, you can also perform a sharpening effect in the Filter menu. Finally, use the “Adjust” → “Levels” or “Brightness/Contrast” options in the “Image” menu to set the desired contrast and other values ​​to achieve the final satisfactory result.