Is there a way to estimate amount of black color in an image using Photoshop?

Hello everyone, is there a feature in Photoshop to estimate the amount of black color in a picture as a percentage? I tried Histograms analysis and Curves but I can't figure this out. I need this for some educational analysis. I would appreciate your feedback.

One way is to open the histogram panel and choose the expanded view from the flyout menu, which you get when you click in the upper right hand corner. You will then see statistics about your image. One of them is labeled simply Pixels and that number is the total pixel count in your image. Assuming that you mean r=g=b=0 for black, place you cursor on the left most edge of the graph. When you are there the data will show Level 0 and the Counts number is the number of "black" pixels. The ratio, Counts/Pixels, give you the % of black pixels in the image. Similarly, move your cursor to any other level to find the number of pixels that have that level in the image.
Paulo

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Your Case Number:0184430495
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Sure
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Hello
We are getting ready to do a one year expire/reduce on our very large and old post offices. Is there any way to estimate how log it would take, or to run it in a
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On 12/21/2011 7:57 AM, Michael Bell wrote:
> On 12/21/2011 6:16 AM, ctoledo wrote:
>>
>> Hello
>>
>> We are getting ready to do a one year expire/reduce on our very large
>> and old post offices. Is there any way to estimate how log it would
>> take, or to run it in a
>> 'test mode' that will show how long it would take without cleaning up
>> the mail.
>>
>> Also when it is ran on the post office, does it lock the entire post
>> office, or just the accounts it is working on at that moment.
>>
>> Any thoughts will be appeciated.
>>
>> Chris T.
>>
>>
> Well you could run a reduce only run. It's probably going to be 50%
> worse than that.
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Cheers
Kumar

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Is there a way to estimate amount of black color in an image using Photoshop?

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