Join Deke McClelland for an in-depth discussion in this video Luminance and how it relates to color, part of Photoshop CC 2019 One-on-One: Fundamentals.
- In Photoshop and other graphics programs,…brightness goes by many names including shade,…tone and my favorite, luminance.…And an everyday average RGB image,…which is far and away the most common…kind of image you'll encounter,…luminance is measured in steps known as levels.…A level of zero is black and a level of 255 is white.…The other levels, one through 254,…represent the progressively brighter…shades of gray in between.…So where does color come in?…You have three luminance only versions…of an image called channels.…
One each for the primary colors of light,…red, green and blue, hence, RGB.…The three channels are respectively colorized…red, green and blue and then blended together.…In other words, color is a function of luminance.…Meanwhile, luminance and color sometimes…react with each other in surprising ways.…Look at a strip of gray values…and you see a steady progression…of neutral levels just as you would expect.…Throw a cool color like blue into the mix…and the blues go from light to dark as expected.…
Author
Released
12/12/2018- Opening an image from the Windows desktop or Macintosh Finder
- Navigating an image by zooming, panning, and rotating the view
- Customizing your workspace
- Changing image size and resolution
- Cropping and straightening photographs
- Working with layers
- Saving your progress
- Adjusting brightness and contrast
- Balancing colors and eliminating color cast
- Making complex, organic selections
- Working with the Quick Mask mode
- Retouching faces and portrait photos
- Cloning and healing
- Using the intelligent Content-Aware options
- Developing a digital photograph in Camera Raw
- Creating and formatting type
- Printing images with accurate color
- Creating web graphics
Skill Level Beginner
Duration
Views
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Introduction
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Welcome to One-on-One2m 54s
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1. Opening an Image
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2. Getting Around
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Zooming in and out7m 29s
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Entering a custom zoom value4m 29s
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Scrolling (panning)3m 43s
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Cycling between screen modes6m 17s
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Using the Navigator panel7m 11s
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Updating a workspace5m 49s
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3. Image Size and Resolution
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Digital imaging fundamentals1m 45s
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Image size and resolution5m 36s
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Common resolution standards8m 48s
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Downsampling for print6m 8s
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4. Crop, Restore, and Straighten
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Too many pixels2m 2s
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Introducing the Crop tool4m 23s
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Cropping nondestructively5m 15s
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Using Content-Aware Crop4m 58s
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Using the Straighten tool3m 45s
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5. Introducing Layers
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The layered composition1m 32s
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Introducing the Layers panel5m 33s
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Employing a clipping mask3m 40s
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6. Saving Your Progress
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The many, many ways to save1m 40s
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7. Brightness and Contrast
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How luminance works5m 18s
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The three Auto commands4m 45s
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Custom Brightness/Contrast4m 42s
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Introducing the Histogram4m 40s
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Putting the Histogram to use5m 47s
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8. Balancing Colors
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Introducing Hue/Saturation5m 57s
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Customizing your color wheel3m 20s
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9. Making Selections
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10. The Quick Mask Mode
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Painting selections1m 51s
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Reversing a mask with Invert4m 26s
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11. Retouch and Heal
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Your best face forward1m 18s
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Correcting very bad colors5m 45s
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12. Introducing Camera Raw
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Adjusting the Dehaze value4m 39s
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Using the Spot Removal tool4m 27s
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13. Creating and Formatting Text
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Finding the perfect font7m 17s
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Type size and script fonts5m 29s
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Creating text along a circle5m 15s
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Double-stroking a circle3m 48s
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14. Printing Your Images
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Print from RGB, not CMYK3m 11s
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Print, size, and position9m 25s
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15. Creating Web Graphics
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How color works on the web7m 43s
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Quick Export as PNG5m 34s
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Quick Export as JPEG4m 17s
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Saving an 8-bit GIF or PNG6m 59s
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Saving an animated GIF file4m 31s
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Conclusion
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Until next time2m 6s
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Video: Luminance and how it relates to color