Previous page Next page

ISO Sensitivity / Noise levels (contd.)

In-camera High ISO noise reduction

Another feature that wasn't available on the 400D is optional 'High ISO speed noise reduction' which can be enabled via C.Fn II-4. The name is slightly misleading as, shown clearly on the graph below, it actually reduces chroma noise at all settings. It made almost no difference to luminance noise, instead concentrating on removing the colorful blotches that can otherwise creep in. There is some loss of detail, but even with NR on, there's more detail than the competition.

Indicated ISO sensitivity is on the horizontal axis of this graph, standard deviation of luminosity on the vertical axis (note that the standard deviation scale here is magnified 2x compared to the graphs on the previous page).

In-camera High ISO noise reduction Off / On (ISO 200 - 1600)

Canon EOS 1000D
ISO 200
ISO NR Off
Canon EOS 1000D
ISO 400
ISO NR Off
Canon EOS 1000D
ISO 800
ISO NR Off
Canon EOS 1000D
ISO 1600
ISO NR off

Canon EOS 1000D
ISO 200
ISO NR On
Canon EOS 1000D
ISO 400
ISO NR On
Canon EOS 1000D
ISO 800
ISO NR On
Canon EOS 1000D
ISO 1600
ISO NR On

RAW noise reduction

Both Digital Photo Professional and Adobe Camera RAW have selectable noise reduction options providing control over chrominance and luminance noise reduction independently. The new version of Digital Photo Professional provides a 0-10 scale whilst Adobe Camera RAW provides a 0-100 scale for each. Looking at the DPP conversions with NR turned off, it's immediately clear that the EOS 1000D is always applying a level of noise reduction to its JPEGs, regardless of the 'High ISO NR' setting. This is common on cameras of this level.

The crops below show the effect of using various noise reduction options in Digital Photo Professional as well as Adobe Camera Raw's default output for reference. Obviously both programs offer a far finer degree of control over noise reduction than we're showing here. However, this shows the trade-offs that can be made between the desire to suppress noise and the need to retain detail.

  • Canon DPP Off / Off: Luminance and Chrominance NR 0 (zero)
  • Canon DPP Off / High: Luminance NR 0 (zero), Chrominance NR 10 (maximum)
  • Canon DPP High / High: Luminance and Chrominance NR 10 (maximum)
  • Adobe ACR default: Luminance NR 0 (zero), Chrominance NR 25

Raw Noise Reduction comparison ISO 800

Canon DPP
Off / Off (default)
Canon DPP
Off / High
Canon DPP
High / High
Adobe ACR
(default)

Raw Noise Reduction comparison ISO 1600

Canon DPP
Off / Off (default)
Canon DPP
Off / High
Canon DPP
High / High
Adobe ACR
(default)
Previous page Next page
124
I own it
2
I want it
84
I had it
Discuss in the forums

Comments