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color the image color the image Presentation Transcript

  • PHOTSHOP PRESENTATION
    By
    MAMTA SAIGAL
  • WHAT IS PHOTOSHOP
    The Adobe Photoshop workspace is arranged to help you focus on creating and editing images The workspace includes menus and a variety of tools and palettes for viewing, editing, and adding elements to your images.
    Adobe Photoshop can open and import many types of graphic file to work effectively.
    MAMTA SAIGAL
  • TOPIC
    Color can be described in several ways using a color model such as RGB or CMYK. As you work in your image, you specify colors using one of the color models. In Photoshop you choose the approach to color that’s appropriate for your image and how it’s being use
    HOW TO COLOR BLACK AND WHITE IMAGE
    Color can be described in several ways using a color model such as RGB or CMYK. As you work in your image, you specify colors using one of the color models. In Photoshop you choose the approach to color that’s appropriate for your image and how it’s being used.
    RGB images use three colors, or channels, to reproduce colors on-screen. In 8‑bits-per-channel images, the three channels translate to 24 (8 bits x 3 channels) bits of color information per pixel. With 24‑bit images,
    a bright blue color might have an R value of 0,
    a G value of 8, and a B value of 255.
    MAMTA SAIGAL
    View slide
  • CMYK Color mode
    In the CMYK mode, each pixel is assigned a percentage value for each of the process
    inks. The lightest (highlight) colors are assigned small percentages of process ink colors;
    CMYK is a standard color model, the exact range of colors represented can vary,
    depending on the press and printing conditions. In CMYK images, pure black is
    generated when all four components have values of 100%.
    Lab Color mode
    The CIE L*a*b* color model (Lab) is based on the human perception of color.
    The numeric values in Lab describe all the colors that a person with normal
    vision sees. Because Lab describes how a color looks rather than how much
    of a particular colorant is needed for a device (such as a monitor, desktop printer,
    or digital camera) to produce colors, Lab is considered to be a device-independent
    color model. Color management systems use Lab as a color reference to predictably
    transform a color from one color space to another color space.
    MAMTA SAIGAL
    View slide
  • Grayscale mode
    Grayscale mode uses different shades of gray in an image. In 8‑bit images, there can
    be up to 256 shades of gray. Every pixel of a grayscale image has a brightness value
    ranging from 0 (black) to 255 (white). In 16 and 32‑bit images, the number of shades
    in an image is much greater than in 8‑bit images.
    Bitmap mode
    Bitmap mode uses one of two color values (black or white) to represent the pixels
    in an image. Images in Bitmap mode are called bitmapped 1‑bit images because
    they have a bit depth of 1.
    Duotone mode
    Duotone mode creates monotone, duotone (two-color), triton (three-color),
    and quad tone (four-color) grayscale images using one to four custom inks.
    MAMTA SAIGAL
  • Indexed Color mode
    Indexed Color mode produces 8‑bit image files with up to 256 colors. When converting
    to indexed color, Photoshop builds a color lookup table (CLUT), which stores and
    indexes the colors in the image. If a color in the original image does not appear in
    the table, the program chooses the closest one or uses dithering to simulate the
    using available colors.
    Multichannel mode
    Multichannel mode images contain 256 levels of gray in each channel and are useful
    for specialized printing. Multichannel mode images can be saved in Photoshop,
    MAMTA SAIGAL
  • Open the photo you want to convert
    MAMTA SAIGAL
  • Convert a color photo to Grayscale mode:
    1- Open the photo you want to convert
    2- Choose Image > Mode > Grayscale
    Convert Grayscale to RGB mode:
    3- Choose Image > Mode > RGB
    Select with the Magnetic Lasso tool
    When you use the Magnetic Lasso tool , the border snaps to the edges of defined
    areas in the image. The Magnetic Lasso tool is not available for 32‑bits-per-channel
    images.
    MAMTA SAIGAL
  • Specify one of the selection options in the options bar.
    Selection options A. New B. Add To C. Subtract From D. Intersect With
    D
    A
    B
    C
    A
    C
    MAMTA SAIGAL
  • Save and load selections
    Choose Select > Save Selection
    You can save any selection as a mask in a new or existing alpha channel
    and later reload the selection from the mask.
    Load a saved selection
    Choose Select > Load Selection.
    you are loading a saved selection from another image, make sure to open it.
    Also, make sure your destination image is active.
    MAMTA SAIGAL
  • MAMTA SAIGAL
  • Apply the Color Balance command
    MAMTA SAIGAL
  • 1 The Color Balance command changes the overall mixture of colors
    an image for generalized color correction.
    2 Choose Layer > New Adjustment Layer > Color Balance.
    Click OK in the New Layer dialog box.
    3 Select Shadows, Midtones, or Highlights to select the tonal range in which
    you want to focus the changes.
    4 Drag a slider toward a color that you want to increase in the image; drag a slider
    away from a color that you want to decrease in the image. The values above the
    color bars show the color changes for the red, green, and blue channels. (For Lab
    images, the values are for the A and B channels.) Values can range from ‑100 to +100.
    MAMTA SAIGAL
  • MAMTA SAIGAL
  • MAMTA SAIGAL
  • Apply the Brightness/Contrast command
    The Brightness/Contrast command lets you make simple adjustments to the tonal range of an image. Moving the brightness slider to the right increases tonal values and expands image highlights, to the left decreases values and expands shadows. The contrast slider expands or shrinks the overall range of tonal values in the image.
    1 Choose Layer > New Adjustment Layer > Brightness/Contrast.
    Click OK in the New Layer dialog box.
    2 Drag the sliders to adjust the brightness and contrast. Dragging to the left decreases
    the level, and dragging to the right increases it. The number at the right of each slider
    reflects the brightness or contrast value. Values can range from ‑150 to +150
    for Brightness, ‑50 to +100 for Contrast.
    MAMTA SAIGAL
  • MAMTA SAIGAL
  • MAMTA SAIGAL
  • Save a file
    You use the Save command to save changes to the current file or Save As to save
    a new version of the current file.
    Save a file in PNG format
    You can use the Save As command to save RGB, Indexed Color, Grayscale
    and Bitmap mode images in PNG format.
    MAMTA SAIGAL