Advice 1: How to lighten the background in Photoshop

Quite often, for various reasons, be it lack of professionalism of the photographer, the imperfection of the modes of the automatic adjustment of the photographic or unfavorable lighting, which is performed when the photography, the final images turn out too dark. The situation can be corrected with the help of Adobe Photoshop and its main tools.
How to lighten the background in Photoshop
You will need
  • - photo with a darker background
  • - computer with installed Adobe Photoshop
Upload a photo file, which requires a brightening of the background. If you need to pre-cut the unnecessary edge of the frame and prepare for the end size. If the picture is too dark, even the lightest of details and seats on it look muted, try to hold one simple operation.
Go to the menu "Image" (Image) "Auto recovery contrast" (Auto Contrast). Such action will not result in the loss of information in the photo that distinguishes it from most other operations. The photograph will not disappear any detail, and this is very important for further processing. The result of this action the most, the light areas will be lighter, the darker – in fact, the darker, that is, the optimized dynamic range of an image. Because of this, there is a possibility of correction of mistakes made during exposure, due to the automation of the camera or inept actions of the photographer. Usually the image becomes clearer and brighter after the operation.
Make adjustments in the overall gamma of the image. Apply to menu Image>Adjustments command "Levels" (Levels). It is also possible to use the key combination Ctrl+L.
To even out the tone of the picture, move the middle slider under the histogram to the left, while the lighting pictures will not be needed, pleasant to the eye level. This correction method is more secure than, for example, the standard operation Brightness / Contrast (Brightness/Contrast).
Note that in the case of lightening of the picture by changing brightness detail from a medium to a lighter tone elements that were so bright, beyond the dynamic range. In other words, information is destroyed. That is, where there was light transitions, formed a bright solid spots of large size, and the image within them disappears. Therefore, the panel is allowed to apply only for cosmetic purposes.

Advice 2: How to change the background on pictures in Photoshop

Partial or complete change of the background picture is one of the necessary operations to create a collage. Tools editor Photoshop allow you to do it in different ways. The choice of means suitable to replace the backgrounddepends on the edited photos and the result that should be obtained.
How to change the background on pictures in Photoshop
You will need
  • - Photoshop;
  • photography;
  • file with the new background.
Download the Photoshop option Open from the File menu. Make photo editable, using the option Layer from Background group New from the File menu.
Insert the document image with the new background. Not to make unnecessary actions, use the Place option in File menu. Using the frame appeared around the image added to the file this way, you can adjust the size of the background.
If you need to get a combination of two background images, change the blending mode of the top layer from Normal to one that will give you acceptable result. The Darken modes at Linear Burn will give the darkening of the picture. If you want to lighten a photo, use modes from Linear Dodge to Lighten. The Overlay is suitable for overlay textures.
If you change the background by changing the blend mode of one of the layers object in the picture was also changed. It is possible to fix with a layer mask. Using the option to Reveal All that is in the group Layer Mask on Layer, add a mask to the top layer and paint black color over the shapes that you want to remove the overlaid image. To work with the mask will fit the Brush tool.
For a complete change of the background picture move the picture with the new background under the photo option on the Send Backward group of the Arrange Layer menu or the mouse. To the layer with the add a mask. If the photo is taken on a solid background, select the background with Magic Wand tool. Click on the mask and fill selected area with black color applying the Paint Bucket tool, the Foreground Color mode. The desired mode can be selected from the list in the settings panel, which is located under the main menu.
If the photo was taken on a multicolored background and highlight it with one click does not work, you can try to separate it using one of the color channels. Select in the palette channel in which are pictured the object most different from the background. Option Duplicate Channel from the context menu to create a copy of this channel.
With the option Brightness/Contrast or Curves Adjustments group menu Image increase the contrast of images so that the foreground object was completely white and the background black. If the image that you want to allocate have become dark, use the Invert option from the same group. Load allocation, using the option Load Selection menu Select. Select the name of the edited channel as the source.
Select the RGB channel to make the image colorful. Clicking in the layers palette, add a mask to the layer with the button Add layer mask. If the picture remains of old background, fix the mask.
If necessary, edit the photo settings with the option Hue/Saturation Adjustments group. The object in the photo should not stand out from the color scheme of the new background.
Save the edited photo to jpg file Save As option the File menu.
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