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    Uncached refresh for all open windows

    The cache levels in my performance preferences is set to 1, yet the histogram is still giving me values from different cache levels.
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    Uncached refresh for all open windows

    Is there a way to record the "uncached refresh" action? When I double click the histogram, click the warning triangle, the refresh button, or select "uncached refresh" from the histogram menu, my actions don't seem to be able to record this. I'm hoping to be able to perform Uncached Refresh on...
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    Export histogram info

    It exports a .csv of numbers which I have no idea how to make sense. None of those numbers are the number for "Pixels: " highlighted in the image I attached: At least I am able to get the area measurement, but I was hoping to get the pixel count (not the area) after making a selection...
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    How does photoshop measure area and count pixels?

    So how can I get Photoshop to only display information from the first cache level? The cache levels in my performance preferences is set to 1, yet the histogram is still giving me values from different cache levels.
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    Export histogram info

    I've come across that thread but they don't explain how to do it. I am using CS6. Any suggestions about how to do this? Do I need to purchase an extension or plugin? Thank you! Andrew
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    Export histogram info

    Is it possible to export the histogram info into a spreadsheet, in the same way I can do with the measurement log? I need it to include the value for "Pixels:" Thanks, Andrew
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    Automatically detect and select a circle/circular area

    I'm looking for a way to batch process thousands of images. Is there a way for Photoshop to automatically detect the circular area I need select? The problem is that the images are different sizes and the circle is not going to be in the exact same spot every time. Also, as you will see in the...
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    How does photoshop measure area and count pixels?

    Turning Anti aliasing off didn't give me an accurate area measurement in the histogram. Only refreshing the histogram did. I read in another forum that they a cached version of the image is used so as to generate the histogram (and other operations) faster. It would take longer to provide...
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    How does photoshop measure area and count pixels?

    Wow, so this definitely means that my results are going to be way off on the thousands of images I have already analyzed. I was definitely using the cached histogram results. I compared results to using the uncached histogram, and there are significant differences.
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    How does photoshop measure area and count pixels?

    The question remains: What is the histogram measuring when it gives me "Pixels: 103471" in this picture, yet the measurement log gives the correct area of 6621510 for the elliptical marquee selection. I've completely reset Photoshop to default settings/preferences My goal is to calculate the...
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    How does photoshop measure area and count pixels?

    A ha! That did the trick. Thank you! However, with feathering shouldn't the pixel count be larger than with no feathering?
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    How does photoshop measure area and count pixels?

    To clarify, I am using the elliptical marquee tool. I need to select a circular region of interest, not actually draw a circle. When I use the ellipse tool, the numbers next to the mouse are consistent with the measurements shown for W and H in the tool options bar, which are 100 and 100. I...
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    How does photoshop measure area and count pixels?

    That's odd, I just realized that the numbers that appear, indicating Height and Width next to the mouse while I was drawing a circle, were different from the values given for Height and Width in my measurement log. When the numbers next to my mouse showed H:100 and W:100, the measurement log...
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    How does photoshop measure area and count pixels?

    The area of a circle that is 100 W X 100 H should be 7853.98 (Pix50x50). However, when I record measurements for this circle, the area displayed in my measurement log gives me 5720. My measurement scale is set to 1 pixel = 1 pixel. Furthermore, in my histogram I get "Pixels: 5640." What is...
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    Analyzing images for scientific research

    How do you drop the contrast in the L channel? I assume you're referring to the lightness channel? is this something that needs to be done differently for each image? I'm considering adding this to my list of actions to be automatically performed on each image. Thanks again! Andrew
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    Analyzing images for scientific research

    What is the advantage of switching to Lab Mode and adding an adjustment layer versus just going to Image > adjustments > hue/saturation?
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    Analyzing images for scientific research

    Awesome, thanks guys! I will attach another image that is fairly representative of the difficulty: https://drive.google.com/file/d/0B208tul7Kbkbd1pKWkpZNUMybFk/view?usp=sharing I will try out some of your suggestion. ASIVA sounds great, but unfortunately I'm using Photoshop on a lab computer...
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    Analyzing images for scientific research

    Thanks for the responses. Remember, I have to do this on thousands of images so deleting all non-plant matter is not feasible. Let me clarify - I only need plant matter that is GREEN (or would appear green if it weren't for shadows. I was able to refine my selected color range by (if I...
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    Analyzing images for scientific research

    I am a lab assistant at Norther Arizona University's Ecosystem Science research lab with the task of analyzing thousands of images in photoshop. The goal is to calculate the amount of living, green plant matter within a specific circular area. I am hoping for advice on how I can streamline...
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