8-Bit and 16-Bit Intensity Images :: Displaying Bit-Mapped Images (Graphics)

Graphics

8-Bit and 16-Bit Intensity Images

Whereas the range of double image arrays is usually [0, 1], the range of 8-bit intensity images is usually [0, 255] and the range of 16-bit intensity images is usually [0, 65535]. Use the following command to display an 8-bit intensity image with a grayscale colormap.

```
imagesc(I,[0 255]); colormap(gray);
```

To convert an intensity image from double to uint16, first multiply by 65535.

```
I16 = uint16(round(I64*65535));
```

Conversely, divide by 65535 after converting a uint16 intensity image to double.

```
I64 = double(I16)/65535;
```

8-Bit and 16-Bit Indexed Images 8-Bit and 16-Bit RGB Images