Low light performance still really noisy

Discussion in 'iPhone 5S' started by ZR_Yancy, Sep 27, 2013.

  1. ZR_Yancy

    ZR_Yancy Genius
    Gold

    Joined:
    Jul 11, 2008
    Likes Received:
    737
    I know Apple increased the pixel sensor size for improved low light performance but I'm disappointed. It's very noisy.

    Stock camera

    e2egy4eg.jpg


    645Pro app

    y2ebarej.jpg

    What's up with that?

    Anybody else experiencing a lot of noise in low light photos with the stock camera?
     
  2. Bennyboy

    Bennyboy Genius
    Platinum

    Joined:
    Jul 21, 2010
    Likes Received:
    1,756
    Is this with flash on or off?
     
  3. ZR_Yancy

    ZR_Yancy Genius
    Gold

    Joined:
    Jul 11, 2008
    Likes Received:
    737
    Flash was off.
     
  4. Lon

    Lon Evangelist
    Gold

    Joined:
    Jun 5, 2010
    Likes Received:
    132
    Could anyone else really tell the difference between those two photos!


    Sent Using iCafe App
     
  5. Bennyboy

    Bennyboy Genius
    Platinum

    Joined:
    Jul 21, 2010
    Likes Received:
    1,756
    Just curious. I'd think if you gonna see a difference it would be on a close up, far away shots are hard to come out decent unless you use apps, like in your case 645 pro which is less noisier. Another is averagecampro which I'm sure you've heard of. Try with a tripod.
     
  6. Bennyboy

    Bennyboy Genius
    Platinum

    Joined:
    Jul 21, 2010
    Likes Received:
    1,756
    If you Zoom in on both the 645 pro shot is much better.
     
  7. Europa

    Europa Moderator
    Senior Moderator

    Joined:
    Dec 12, 2008
    Likes Received:
    5,432
    Yeah, I can see it.
     
  8. shutter13

    shutter13 Evangelist
    Gold

    Joined:
    Jan 8, 2009
    Likes Received:
    117
    It looks to me like there has been some noise reduction applied to the second photo. As the hardware is the same for both pics the RAW data is the same for both pics. One program adds noise reduction, which is NOT better low light performance. I can make the 1st pic look just as good as the second in about 10 seconds in PS. If you want to compare...use images from the stock camera on the 5 vs 5s. That will tell you if they actually improved or not. The exif was stripped from the images, I would be interested to see what iso was chosen by the phone for this scene and if it is the same for both images.
     
    • Like Like x 3
    • Agree Agree x 2
    • List
  9. ZR_Yancy

    ZR_Yancy Genius
    Gold

    Joined:
    Jul 11, 2008
    Likes Received:
    737
    iPhone 5s
    6juo.jpg
    Exif data:
    ApertureValue: 2.275007124536905
    BrightnessValue: -1.486972998578873
    ColorSpace: sRGB
    ComponentsConfiguration: YCbCr
    DateTimeDigitized: 2013:09:28 12:54:17
    DateTimeOriginal: 2013:09:28 12:54:17
    ExifVersion: 2.2.1
    ExposureMode: Auto
    ExposureProgram: Normal
    ExposureTime: 0.06666666666666667
    FNumber: 2.2
    Flash: No Flash
    FlashPixVersion: 1.0
    FocalLenIn35mmFilm: 30
    FocalLength: 4.12
    ISOSpeedRatings: 640
    LensMake: Apple
    LensModel: iPhone 5s back camera 4.12mm f/2.2
    LensSpecification: 4.12,4.12,2.2,2.2
    MeteringMode: Spot
    PixelXDimension: 3264
    PixelYDimension: 2448
    SceneCaptureType: Standard
    SceneType: Directly Photographed
    SensingMethod: One-chip color area
    ShutterSpeedValue: 3.907099697885196
    SubsecTimeDigitized: 854
    SubsecTimeOriginal: 854
    WhiteBalance: Auto
    Altitude: 21.75353773584906m
    AltitudeRef: Above sea level
    DateStamp: 2013:09:28
    TimeStamp: 16:54:17
    (file) DateTime: 2013:09:28 12:54:17
    Make: Apple
    Model: iPhone 5s
    Orientation: Up
    ResolutionUnit: Inches
    Software: 7.0.2
    XResolution: 72
    YResolution: 72
    PixelWidth: 3264
    PixelHeight: 2448
    FileSize: 1.95956 MB


    iPhone 5
    3hml.jpg
    Exif data:
    ApertureValue: 2.52606882168926
    BrightnessValue: -1.634360374414977
    ColorSpace: sRGB
    ComponentsConfiguration: YCbCr
    DateTimeDigitized: 2013:09:28 12:54:11
    DateTimeOriginal: 2013:09:28 12:54:11
    ExifVersion: 2.2.1
    ExposureMode: Auto
    ExposureProgram: Normal
    ExposureTime: 0.06666666666666667
    FNumber: 2.4
    Flash: Off, Did not fire
    FlashPixVersion: 1.0
    FocalLenIn35mmFilm: 33
    FocalLength: 4.12
    ISOSpeedRatings: 800
    LensMake: Apple
    LensModel: iPhone 5 back camera 4.12mm f/2.4
    LensSpecification: 4.12,4.12,2.4,2.4
    MeteringMode: Spot
    PixelXDimension: 3264
    PixelYDimension: 2448
    SceneCaptureType: Standard
    SceneType: Directly Photographed
    SensingMethod: One-chip color area
    ShutterSpeedValue: 3.906905055487053
    SubsecTimeDigitized: 795
    SubsecTimeOriginal: 795
    WhiteBalance: Auto
    Altitude: 22.52230483271375m
    AltitudeRef: Above sea level
    DateStamp: 2013:09:28
    TimeStamp: 16:54:11
    (file) DateTime: 2013:09:28 12:54:11
    Make: Apple
    Model: iPhone 5
    Orientation: Down
    ResolutionUnit: Inches
    Software: 7.0.2
    XResolution: 72
    YResolution: 72
    PixelWidth: 3264
    PixelHeight: 2448
    FileSize: 2.13086 MB


    The iPhone 5s image seems to be brighter possibly due to a bigger sensor but there is still a lot of noise.


    Here's one taken with 645Pro app with night shot enabled on my iPhone 5s.

    6wms.jpg
    Exif data:
    ApertureValue: 2.275007206687806
    BrightnessValue: -1.629329880220136
    DateTimeDigitized: 2013:09:28 12:54:44
    DateTimeOriginal: 2013:09:28 12:54:44
    DigitalZoomRatio: 1
    ExposureMode: Auto
    ExposureProgram: Normal
    ExposureTime: 0.1428571428571428
    FNumber: 2.2
    Flash: No Flash
    FocalLenIn35mmFilm: 30
    FocalLength: 4.12
    ISOSpeedRatings: 320
    LensMake: Apple
    LensModel: iPhone 5s back camera 4.12mm f/2.2
    LensSpecification: 4.12,4.12,2.2,2.2
    MeteringMode: Pattern
    PixelXDimension: 3264
    PixelYDimension: 2448
    SceneType: Directly Photographed
    SensingMethod: One-chip color area
    ShutterSpeedValue: 2.819566960705694
    WhiteBalance: Auto
    Byline:
    DateCreated: 20130928
    DigitalCreationDate: 20130928
    DigitalCreationTime: 125444
    TimeCreated: 125444
    Compression: 5
    Make: Jag.gr
    Model: 645 PRO for iPhone
    Orientation: Up
    PhotometricInterpretation: RGB
    ResolutionUnit: Inches
    Software: 3.12, unprocessed
    XResolution: 300
    YResolution: 300
    Altitude: 21.94827076559267m
    AltitudeRef: Above sea level
    PixelWidth: 3264
    PixelHeight: 2448
    FileSize: 6.54082 MB

    The ISO on the 645Pro app is less than the iP5s and iP5 which results in less noise. Exposure time was just a tiny bit higher on the 645Pro app than both iP5s and iP5 stock camera app to compensate for the lower ISO. Noise level didn't really make a noticeable improvement on the iP5s. I still love my iP5s but just expecting better low light performance due to improved hardware. I guess software plays a big part in that as well.
     

    Attached Files:

    #9 ZR_Yancy, Sep 28, 2013
    Last edited: Sep 28, 2013
  10. shutter13

    shutter13 Evangelist
    Gold

    Joined:
    Jan 8, 2009
    Likes Received:
    117
    One thing I notice right off the bat is that the 5S uses a lower iso value than the 5 ISO 640 vs ISO 800, which accounts for a slightly better low light performance, and the 5S 645Pro image has an even lower iso value (ISO 320). Which accounts for your lower noise, but the lower ISO the slower the shutter speed which will mean more blur in low light situations.

    I'm just guessing, whomever it is, at Apple, that is responsible for the software that determines the proper exposure, has built in a preference of higher shutter speeds over ISO. The old adage is, I would rather have a noisy sharp image, than a non-noisy blurry image.

    Also FWIW, with the 1/3 stop difference in ISO between the 5 and the 5S, I would say the difference in signal to noise ratio is pretty negligible, judging by the images you posted. Up the 5S image to ISO 800 and I would imagine the noise would be about the same in both. They may have made the sensor larger, but at the size that fits in a cellphone the difference would most likely not be noticeable to mere mortals. I'm sure a computer analysis would prove that the 5S does perform better, but in real world application with human eyes viewing....they would appear the same.
     

Share This Page