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    <title>tema Re: RASTER IMAGE REFERENCE en AutoCAD Forum</title>
    <link>https://forums.autodesk.com/t5/autocad-forum/raster-image-reference/m-p/6060018#M292156</link>
    <description>&lt;P&gt;Hi,&lt;/P&gt;
&lt;P&gt;&amp;nbsp;&lt;/P&gt;
&lt;P&gt;there are more than just one possibility, most likely the color type of the image, if it's&lt;/P&gt;
&lt;UL&gt;
&lt;LI&gt;bitonal (that is just a black/white image) ... this is the easiest way to get the background of an image transparent in AutoCAD&lt;/LI&gt;
&lt;LI&gt;8bit or 24bit image, then a real white might be used to be transparent (depends also on the version of AutoCAD you have&lt;/LI&gt;
&lt;LI&gt;32bit image, so the image contains an alpha channel, but don't know if the scanner see's white as transparent.&lt;/LI&gt;
&lt;/UL&gt;
&lt;P&gt;&amp;nbsp;&lt;/P&gt;
&lt;P&gt;First try to save the image as bitonal (or "blacl/white") ... if the scanner software can't do that you can use some free software like IrfanView to convert your image to black/white. If that does not work then please&lt;/P&gt;
&lt;UL&gt;
&lt;LI&gt;let us know your AutoCAD version number&lt;/LI&gt;
&lt;LI&gt;scan some linework (not your signature &lt;img class="lia-deferred-image lia-image-emoji" src="https://forums.autodesk.com/html/@59C40FF4A66238AB63B8D5D30F650901/emoticons/1f609.png" alt=":cara_guiñando_un_ojo:" title=":cara_guiñando_un_ojo:" /&gt; ) and upload this image so we know what your scanner ships as data and we can give tips how to do with your raster files.&lt;/LI&gt;
&lt;/UL&gt;
&lt;P&gt;&amp;nbsp;&lt;/P&gt;
&lt;P&gt;- alfred -&lt;/P&gt;</description>
    <pubDate>Sun, 28 Feb 2016 06:28:25 GMT</pubDate>
    <dc:creator>Alfred.NESWADBA</dc:creator>
    <dc:date>2016-02-28T06:28:25Z</dc:date>
    <item>
      <title>RASTER IMAGE REFERENCE</title>
      <link>https://forums.autodesk.com/t5/autocad-forum/raster-image-reference/m-p/6059985#M292155</link>
      <description>&lt;P&gt;I am inserting my signature to the drawings using .TIF image. When I turn the&amp;nbsp;transparency on - the background shoes up (FIG-2). THis signature was made by one HP Scanner several years ago. However, I got a new scanner and when I create .tif image and inserted on the drawing - it blocks the background FIG -1(See attached PDF drawing). I&amp;nbsp;inserted the new tif on Word and it worked fine. I am not sure what is happening with my new machine or I am doing something not correct.&lt;/P&gt;&lt;P&gt;I had a scanner from Zerox and I had that for a year or so. When I created .Tif image with that machine - I got the Fig-2 condition. Previously I used use old HP Scanner and that gone bad.. So I gone out today a got a HP Scanner but with the same result. If this is the norm - then I will return the HP Scanner.&lt;/P&gt;&lt;P&gt;When my drawings goes out for Bid - I sign those drawings with date. I create a signature with date for each project and insert them on the drawings.&lt;/P&gt;&lt;P&gt;Can anybody enlighten me about this problem and what corrective action I may take? I have tried Jpeg and bmp without luck.&lt;/P&gt;&lt;P&gt;My scanner settings are B &amp;amp; W, document, .tif or gpeg or bmp&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;</description>
      <pubDate>Sun, 28 Feb 2016 04:12:49 GMT</pubDate>
      <guid>https://forums.autodesk.com/t5/autocad-forum/raster-image-reference/m-p/6059985#M292155</guid>
      <dc:creator>apanbasu</dc:creator>
      <dc:date>2016-02-28T04:12:49Z</dc:date>
    </item>
    <item>
      <title>Re: RASTER IMAGE REFERENCE</title>
      <link>https://forums.autodesk.com/t5/autocad-forum/raster-image-reference/m-p/6060018#M292156</link>
      <description>&lt;P&gt;Hi,&lt;/P&gt;
&lt;P&gt;&amp;nbsp;&lt;/P&gt;
&lt;P&gt;there are more than just one possibility, most likely the color type of the image, if it's&lt;/P&gt;
&lt;UL&gt;
&lt;LI&gt;bitonal (that is just a black/white image) ... this is the easiest way to get the background of an image transparent in AutoCAD&lt;/LI&gt;
&lt;LI&gt;8bit or 24bit image, then a real white might be used to be transparent (depends also on the version of AutoCAD you have&lt;/LI&gt;
&lt;LI&gt;32bit image, so the image contains an alpha channel, but don't know if the scanner see's white as transparent.&lt;/LI&gt;
&lt;/UL&gt;
&lt;P&gt;&amp;nbsp;&lt;/P&gt;
&lt;P&gt;First try to save the image as bitonal (or "blacl/white") ... if the scanner software can't do that you can use some free software like IrfanView to convert your image to black/white. If that does not work then please&lt;/P&gt;
&lt;UL&gt;
&lt;LI&gt;let us know your AutoCAD version number&lt;/LI&gt;
&lt;LI&gt;scan some linework (not your signature &lt;img class="lia-deferred-image lia-image-emoji" src="https://forums.autodesk.com/html/@59C40FF4A66238AB63B8D5D30F650901/emoticons/1f609.png" alt=":cara_guiñando_un_ojo:" title=":cara_guiñando_un_ojo:" /&gt; ) and upload this image so we know what your scanner ships as data and we can give tips how to do with your raster files.&lt;/LI&gt;
&lt;/UL&gt;
&lt;P&gt;&amp;nbsp;&lt;/P&gt;
&lt;P&gt;- alfred -&lt;/P&gt;</description>
      <pubDate>Sun, 28 Feb 2016 06:28:25 GMT</pubDate>
      <guid>https://forums.autodesk.com/t5/autocad-forum/raster-image-reference/m-p/6060018#M292156</guid>
      <dc:creator>Alfred.NESWADBA</dc:creator>
      <dc:date>2016-02-28T06:28:25Z</dc:date>
    </item>
    <item>
      <title>Re: RASTER IMAGE REFERENCE</title>
      <link>https://forums.autodesk.com/t5/autocad-forum/raster-image-reference/m-p/6060865#M292157</link>
      <description>&lt;P&gt;I tried to make another sample for you. I inserted using a layer white color and it worked. I just tried with a layer having a&amp;nbsp;different color and that worked too. I have a feeling in previous&amp;nbsp;TIFF scan even&amp;nbsp;though I started as B &amp;amp; W - it turned to default to color and that is why I was getting back ground. This time I was careful. And it worked.&lt;/P&gt;&lt;P&gt;Thanks a million.&lt;/P&gt;</description>
      <pubDate>Mon, 29 Feb 2016 04:50:44 GMT</pubDate>
      <guid>https://forums.autodesk.com/t5/autocad-forum/raster-image-reference/m-p/6060865#M292157</guid>
      <dc:creator>apanbasu</dc:creator>
      <dc:date>2016-02-29T04:50:44Z</dc:date>
    </item>
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