Color Correction

When opening up an image in Photoshop we generally click Command + O or going up to File > Open in your Drop down menu and simply find where its saved on our computer. The reason why this is the most common method is because it preserves the pixel aspect ratios for big files.

screen-resolution.png
To figure out the screen resolution (pixel per inch) of your screen, all you need to know is the number of pixels your screen displays and the physical screen size of your monitor in inches, then just divide the pixels by the inches to get your pixels per inch. (ppi)

However sometimes when we are working with images from the web where the resolution is 72 we can just right click on the images we find online and select copy image. Brushes_21Then opening up a new document with Command + N or by going up to File > New in your Drop Down Menu your new document will have the size of your image pre-set in the new window.Brushes_22Without touching anything in the new document window and just pressing ok we get a document with right dimensions so just click Command + V to paste the image in your Photoshop document without having to save it to your computer.Brushes_23 This allows you to make quick edits before ever saving anything to your computer.

And when you have your image pasted, Photoshop will automatically create a new layer for you, so just go ahead and click merge viable in your layers panel to flatten the imageBrushes_24Now that we have our image in Photoshop we can do pretty much anything to it. The first thing we can do is color correct our image and to do this we will need to get our Histogram window by going up to Windows > Histogram in your Drop down menu.Brushes_25 You will also want to view your Red, Green, and Blue channels sp in the hamburger menu to the top right of your Histogram window and click on  “All channels view.” Then to see them in color go to your hamburger menu on the top right again and click on “Show channels in color” and deselect “Show statistics.” Brushes_26When you have everything set up we can basically color correct our image in one of two ways:

  1. The lazy method is to just let Photoshop’s algorithms color correct your image for you by going up to Image > Auto tones in your Drop Down Menu or “Shift + command + L” (used to be auto levels)
    Image > Auto Contrast “Alt + Shift + Command + L”Images > Auto Color “Shift + Command + B”
  2. However the recommended method is to just going  to the adjustments panel on the right (next to library and styles) click on levels. This allows you adjust the levels for the image with the most control, but you need to adjust each color (RGB) individually.
    Once you are finished with the adjustment layer and no longer need the mask you can save ram by clicking and dragging the masks on your adjustment layers to the garbage can to lighten up your document.

Then you can adjust the color tones of your image with one of 4 ways:

  1. Click on your Hue/Saturation in your adjustment layer, click colorize
  2. Click on the Black and White er in your Adjustment panel and click the Tones option.
  3. Click on the Vibrance in your Adjustment panel and increase the vibrancy.
  4. Image > Adjustment > Match Color and select Neutralize. If you have another layer or image that you want to color match your image you can open up your Match Colors window and select a source that you want to color match from.

Sometimes you want your image to be black and white so to create a black and white image you can do it in one of 4 ways.

  1. Converting your image to a gray scale will remove all our channels
    Image > Mode > Grayscale
  2. You can preserve your channels by desatureating the image.
    Image > Adjustment > Desaturate “Shift + Command + U”
  3.  Click on the Channel Mixer in your Adjustment panel and click the Monocrome option.
  4. Click on the Black and White in your Adjustment panel and the total value of this slid bar is 300%

color_corrected.jpg

Reference- CN Tower

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