How to compute the sensor sizes in mm from exif data of an image
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Hello,
Here are the metadata of my image obtained with imfinfo and imfinfo.DigitalCamera:
imf =
Filename: [1x132 char]
FileModDate: '02-Oct-2014 16:32:28'
FileSize: 7115736
Format: 'jpg'
FormatVersion: ''
Width: 4608
Height: 3456
BitDepth: 24
ColorType: 'truecolor'
FormatSignature: ''
NumberOfSamples: 3
CodingMethod: 'Huffman'
CodingProcess: 'Sequential'
Comment: {}
ImageDescription: ' '
Make: 'NIKON'
Model: 'COOLPIX AW100 '
Orientation: 1
XResolution: 300
YResolution: 300
ResolutionUnit: 'Inch'
Software: 'COOLPIX AW100V1.0 '
DateTime: '2014:10:02 16:32:29'
YCbCrPositioning: 'Co-sited'
DigitalCamera: [1x1 struct]
GPSInfo: [1x1 struct]
ExifThumbnail: [1x1 struct]
imf.DigitalCamera
ans =
ExposureTime: 0.0400
FNumber: 3.9000
ExposureProgram: 'Normal program'
ISOSpeedRatings: 400
ExifVersion: [48 50 51 48]
DateTimeOriginal: '2014:10:02 16:32:29'
DateTimeDigitized: '2014:10:02 16:32:29'
ComponentsConfiguration: 'YCbCr'
CompressedBitsPerPixel: 4
ExposureBiasValue: 0
MaxApertureValue: 3.9000
MeteringMode: 'Pattern'
LightSource: 'unknown'
Flash: [1x148 char]
FocalLength: 5
MakerNote: [1x10536 double]
UserComment: [1x128 double]
FlashpixVersion: [48 49 48 48]
ColorSpace: 'sRGB'
CPixelXDimension: 4608
CPixelYDimension: 3456
InteroperabilityIFD: [1x1 struct]
FileSource: 'DSC'
SceneType: 'A directly photographed image'
CustomRendered: 'Normal process'
ExposureMode: 'Auto exposure'
WhiteBalance: 'Auto white balance'
DigitalZoomRatio: 0
FocalLengthIn35mmFilm: 28
SceneCaptureType: 'Landscape'
GainControl: 'High gain up'
Contrast: 'Normal'
Saturation: 'Normal'
Sharpness: 'Normal'
SubjectDistanceRange: 'Close view'
UnknownTags: [1x1 struct]
I guess from this information, I should be able to compute the width and height of the sensor but I cannot manage to figure out how. Note that I cannot manually enter the CDD width or any other information. Would you have any idea?
Cheers!
1 个评论
Mike Leonard
2022-7-9
The only way I see of calculating the sensor size is using the actual "Focal Length" and "FocalLengthIn35mmFilm" ratio using the size of a standard 35 mm frame area. This would only be approximate but close. I don't know the formula, but it should not be hard to figure out. I did not see the "Actual Focal Length" listed in your Exif data. It is 2022 as I attempt to answer a 7 year old question. Hope it helps!
Better late than never?
Mike L.
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