Photoshop: How do a select a Product and remove from a Background?

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  • Updated 7 years ago
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Thanks for your Great Support Adobe Team!!!!!

This is Rajiv. working in amazon.com, Chennai, India.
My question is about the selection in Photoshop CS2.

Brief: We shot the product with pure white background almost 255 value. while we selecting the background with the magic wand tool tolerance value: 1; we can select the product and also we can find out mild dots around the product.
Product size is greater than the dot's size. so If we omit the small selections, we can get only the product. It would help us more. Could you please let me know If there is any option except expand and contract. thanks,
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Mangala Rajiv Shanmugam

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Posted 7 years ago

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Chris Cox

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You have the tolerance too low. Any camera noise, any sensor defect, any bit of dust, etc. will drop the value below 255. Try setting the tolerance a little higher. (usually something less than 10 will do)
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Mangala Rajiv Shanmugam

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hi chris,
thanks for your immediate reply!!!!!
i think, the dust was formed on the background.

the following image has 255 background. there are two dots fixed on the image. One is fixed on the left and the another is on right side of the image. how to remove those black dots in automation process? we cannot use more than one tolerance because we are also working on the white products. if the tolerance value is higher than the image the selection will get inside to the product and will delete it.

My Point is Lower than the Product selection should be omitted.

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Jeffrey Tranberry, Sr. Product Manager, Digital Imaging

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That's a tough one since the dots are the same color/value as the birds. You could use the Image>Trim command to pull the edges in so the dots are a known distance from the edge. If the dots a fixed size, you could do Image>Canvas Size to crop in on the image by x number of pixels.
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Chris Cox

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Normally when shooting for backlight masking, you do two shots: one for color and one for the mask. The color shot has front lighting to illuminate the product, and the mask shot has only backlighting. Otherwise you'd have to underexpose the product in a single photo to avoid having the value ranges overlap.

Right now, you have a problem because you have values in the image that could easily be part of the product, and there is no automatic way to determine that they are not part of the product.
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David Jensen

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Make a mask for your image (an inverted version of the image you posted).
Turn on the visibility of the mask channel and turn off the visibility of all other channels.
Make a selection from the mask.
Contract your selection by 10 pixels.
Set the magic wand to a tolerance of 254.
Grow the selection.
Invert the selection.
Select inverse and fill with black.
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Mangala Rajiv Shanmugam

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thanks for your reply!