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Lesson 6. Photo Retouching > Review questions

Review questions

Q1: What does resolution mean?
A1: The term resolution refers to the number of pixels that describe an image and establish its detail. The three different types of resolution include image resolution, measured in pixels per inch (ppi); monitor resolution, measured in dots per inch (dpi); and printer or output resolution, measured in ink dots per inch.
Q2: How can you use the crop tool in photo retouching?
A2: You can use the crop tool to trim, scale, and straighten an image.
Q3: How can you adjust the tonal range of an image?
A3: You can use the black and white triangles below the Levels command histogram to control where the darkest and lightest points in the image begin and thus extend its tonal range.
Q4: How can you correct a color cast in a photograph?
A4: In Photoshop, you can correct a color cast with a Color Balance adjustment layer. The adjustment layer lets you change the color of the image as many times as you like without permanently affecting the original pixel values.
Q5: What is saturation, and how can you adjust it?
A5: Saturation is the strength or purity of color in an image. You can increase the saturation in a specific area of an image with the sponge tool.
Q6: Why would you use the Unsharp Mask filter on a photo?
A6: The Unsharp Mask filter adjusts the contrast of the edge detail and creates the illusion of a more focused image.



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