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Thread: Posting attachments - the importance of explaining by Annotation.

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    Join Date
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    Lightbulb Posting attachments - the importance of explaining by Annotation.


    Posting policy for technical images etc.
    New policy effective 8 September 2010

    About 1% of our readers have a technical knowledge of audio so if we simplify and explain issues then the 99% can access knowledge that may otherwise be hidden from them. That adds value to the Harbeth brand, and continues the BBC R&D heritage that founded our company.

    One of the dangers of cutting-and-pasting internet links or images is that whilst they may mean something to the 1% they are merely pretty pictures to the 99%. They will be misinterpreted and worse still, those misinterpretations may be passed on (unwittingly) as facts to others. That runs opposite to what we are trying to achieve here.

    Relating to images posted here:


    Technical images (graphs, circuits etc.) must be annotated for the benefit of visitors. That means:

    • Graphs and technical images must have clearly defined axis
    • Channels must be clearly defined
    • Technical images must be titled e.g. "Graph showing distortion on left channel"
    • Regions of the image must be annotated with arrows (or similar) to highlight the issue the Poster wishes to draw the visitors attention to
    • The images must be able to stand on their own without accompanying explanations
    • The Post must draw-out from the image the points that the poster wishes to focus on.

    THINK! Will this image make sense if copied as an image only into another forum? Will it make a valuable point on its own just as an image without accompanying text?

    How to annotate an image?

    Annotation means drawing lines, circles, boxes, arrows etc. on top of the image, then saving the image complete with the annotations and posting it in the HUG. It's not difficult, and it need not be pretty. You can annotate an image in MS Paint (part of Windows) or your favourite graphics programs. You can download a completely free Shareware program that works well here: Annotation Plot (runs on W7 Ultimate too). You can use any image editing program that suits you. One of the best (but it is not free) is Snagit.

    When Annotating the image, be sure to save a master copy in the native program format with the annotations on their own layer so that you can edit them later. When you Save (or Export) the image ready for the HUG those annotations will 'merge-down' and become a permanent part of the picture.

    What is the best image file format?


    If the image is a picture, taken with a camera or scanner then the .JPG or .JPEG format are the best. But if the image is a computer graphic with areas of solid block colour or a screen shot then .PNG is the best format.

    Should I embed or attach an image in my Posting?

    You should Attach, not embed images. Only registered members can read Attached images. They are easier to replace/update, stored separately in the HUG database and we can monitor the number of clicks.

    Any questions? Ask. Example attached of what a technical plot posted could look like.

    >
    Attached Images Attached Images
    Alan A. Shaw
    Designer, owner
    Harbeth Audio UK

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