WebHDR Luminance Map (Demo, page 4/4)
Please read the text below the image before using the interactive luminance reader!
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Read this!
Before you start, please make sure the little tooltip in the falsecolor image displays the correct pixel co-ordinates: Move your mouse to the top left-hand corner and bottom right-hand corner of this picture. The position is indicated as the first two numbers in the tooltip, enclosed in parenthesis like this: (12,32). The indicated position should be (1,1) for the top left corner, and the image dimension as shown below the little control panel to the right of the image for the bottom right corner.
If the co-ordinates do not match that of the false colour image, you need to use the cursor calibration panel.
- Browsers that probably don't need cursor calibration:
- Mozilla Firefox
- Konqueror
- Safari
- Browsers that are likely to require cursor calibration:
- Opera
- Internet Explorer
Example:
You have moved your mouse pointer to the very top left-hand corder of the image. Instead of (1,1), the tooltip shows a value of (12,32). Reduce those figures by one, e.g. (11,31) and enter them into the input fields under Horiz. offset and Vert. offset, resp. Leave the radio buttons untouched, i.e. set to 'left' and 'up', and hit Apply Settings. For negative tooltip co-ordiantes, please toggle the relevant set of radio buttons.
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