Can I take a look at the values of pixels along a line?

Discussion in 'Photoshop' started by jogging, Jan 25, 2011.

  1. jogging

    jogging Guest

    Hi, all

    Nowadays I try to view the values of pixels along a line.
    I hope that I can select a vertical line or horizonal line
    interactively and the values of pixels along the line can
    be viewed on the right side.
    Is it possible using CS5? Thanks.

    Best Regards
    Liwei Song
     
    jogging, Jan 25, 2011
    #1
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  2. It is difficult to understand exactly what you want, but I'll give it a
    try.

    You can use the marque selection tool to selecta single-pixel row
    vertically or horizontally. (hold down the mouse on the marque tool).

    Then you can open the Window - Measurement Log, and press the Record
    Measurements in the log window. It will give you grey value statistics
    (minimum, maximum, median, mean) average pixel values and histogram.

    (Open the Histogram window, too)

    If you want the Histogram to show only that single line of pixels, then
    after you select the row, copy it to a new layer, or better - to another
    single row canvas.

    Is that what you mean?
     
    John Stafford, Jan 25, 2011
    #2
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  3. jogging

    jogging Guest

    Thanks, John

    The information you provide is helpful to me, but
    is not the same thing I am trying to get.
    The operation I desire should be called profile.
    For example, there is a horizontal line from a image
    24 56 34 56 76 21 33 56
    I hope if I draw a line from the third pixel to the seventh
    pixel.
    The values of the line can be plotted, so I can
    see how the values vary along the line.

    Best Regards
    Jogging Song
     
    jogging, Jan 26, 2011
    #3
  4. jogging

    toby Guest

    I've often wanted this to help construct a gradient. Is that what
    you're doing? ;)

    --Toby

    Author of free Photoshop & Illustrator plugins
    @ http://telegraphics.com.au/sw/
     
    toby, Jan 26, 2011
    #4
  5. jogging

    jogging Guest

    I try to use it to see how the values vary
    along the line. I think it will help me to
    analyze images. I am not familiar with Photoshop and
    am learning it right now.
    May it can help construct a gradient and will
    try it later.

    Best Regards
    Jogging
     
    jogging, Jan 30, 2011
    #5
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