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Update APT readme
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@ -62,7 +62,19 @@ Clears the current image and restarts the decoder. The decoder must be reset bet
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Saves the current image to disk. Images can be saved in PNG, JPEG, BMP, PPM, XBM or XPM formats.
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<h3>10: Channel selection</h3>
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<h3>10: Zoom in</h3>
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Zooms in to the image. You can also zoom in with the scroll wheel.
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<h3>11: Zoom out</h3>
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Zooms out from the image. You can also zoom out with the scroll wheel.
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<h3>12: Zoom image to fit</h3>
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Zooms so that the image fits in to the available space.
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<h3>13: Channel selection</h3>
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Selects whether:
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@ -70,29 +82,29 @@ Selects whether:
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- only channel A is displayed
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- only channel B is displayed
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<h3>11: Crop noise</h3>
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<h3>14: Crop noise</h3>
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When checked, noise is cropped from the top and bottom of the image. This is noise that is typically the result of the satellite being at a low elevation.
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<h3>12: Apply denoise filter</h3>
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<h3>15: Apply denoise filter</h3>
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When checked, a denoise filter is applied to the received image.
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<h3>13: Apply linear equalisation</h3>
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<h3>16: Apply linear equalisation</h3>
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When checked, linear equalisation is performed, which can enhance the contrast. The equalisation is performed separately on each channel.
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<h3>14: Apply histogram equalisation</h3>
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<h3>17: Apply histogram equalisation</h3>
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When checked, histogram equalisation is performed, which can enhance the contrast. The equalisation is performed separately on each channel.
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<h3>15: Overlay precipitation</h3>
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<h3>18: Overlay precipitation</h3>
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When checked, precipitation is detected from the IR channel and overlayed on both channels using a colour palette.
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This option will not work if linear or histogram equalisation has been applied.
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<h3>16: Pass direction</h3>
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<h3>19: Pass direction</h3>
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The pass direction check button should be set to match the direction of the satellite pass.
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i.e. select down arrow for satellite passing from the North to the South and the up arrow for the satellite passing from the South to the North.
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