search engine - Keep bots and crawlers from recognizing images -

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i want present image visitors, , don't mind if download (they can take screenshot anyway), don't want image appear in search results ever.

while know can politely ask bots not index content, don't trust them. therefore, want them not recognize image. 2 ideas:

  1. create image through e.g. php's image functions: <img src="image.php">. guess google understands this.

  2. publish image table, each cell 1x1 pixels , background color of pixel: <td style="width:1px;height:1px;background-color:#36ef2a"></td>.

better ideas?

does include not trusting /robots.txt file in setup? not sure if meant.

what type of images they? if text, , can represented drawings, can try using html5 canvas element and/or inline svg present image.

i'm not sure if can use background images point inside css.


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