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FWIW, the Exif says 15.9 megapixels (5312x2988 is 15.872 megapixels).

This 15.872 mp allows:

Aspect ratio 1:1 / 3984 x 3984 pixels = 15.872 mp

Aspect ratio 4:3 / 4600 x 3450 pixels = 15.870 mp

Aspect ratio 3:2 / 4879 x 3253 pixels = 15.871 mp

Aspect ratio 16:9 / 5312 x 2988 pixels = 15.872 mp

But 16:9 in a 15.87 mp 4:3 sensor can't be wider than the chips 4600 pixels,
so that 16:9 movie mode would be 4600x2587 pixels But this image is 5312x2988, so this is NOT a 4:3 chip, but 15.87 mp can only be a 16:9 camcorder chip.

You are missing something big. The size of the camera sensor is not mentioned. You need to know it, both in mm and in pixels. You didn't say any sizes, but Samsung says 3.7 megapixels, so if 4:3, that is 2221 x 1666 pixels. Samsung specs don't say. Your image will be this size though, you can know its pixel dimensions.

The sensor mm is pretty difficult to determine on most phones. At most, the Samsung Note 4 says it is a 1/2.6" sensor, but this is a fake number, not a real dimension of anything. Wikipedia says a Nokia 1/2.5" is 5.76 x 4.29 mm, but that's not real helpful. All we know though.

Not sure what you are trying to calculate, you seem to know both the size of the object and its distance. The formula you found calculates distance, not size. Here is a calculator that also computes distance, not size. http://www.scantips.com/lights/subjectdistance.html

Both require knowing sensor size, in mm and in pixels. If you knew crop factor, the calculator can compute sensor size in mm. I dare say this is is unknown too though.

Sensor height 4.29mm
Focal length 4.8mm
Sensor size 1667 pixels
Subject size 596 pixels
Subject height 0.9 meters

Then Subject Distance 2.82 meters

So these numbers from plugging in your numbers and my guesses, it computes distance as 2.82 meters, which you said was 2.3 meters. Seems halfway close, since we don't know the numbers.

This works better with bigger cameras for which we actually know specs.

EDIT: Your detailed Exif helps.

It says Image Size : 5312x2988
Megapixels : 15.9
Focal Length : 4.8 mm (35 mm equivalent: 31.0 mm)

Not 3.7 megapixels anymore. :) And 5312x2988 is 1.78 aspect (HDTV). So calculator says with camcorder crop factor of 31/4.8 = 6.48x (compared to 35mm film). We know the size of 35 mm, so using diagonals, it computes sensor height to necessarily be 5.84 mm height.

Other sources say Samsung 1/2.6" is 5.5x4.1 mm (4:3), close to Scott's numbers (but his is 1.44:1, which may be a typo?). I am not aware of where Samsung says it. However your image size says 5312x2988 which is 1.78:1 HD, camcorder mode. That wider image is necessarily shorter height.

Anyway, from that, and corrected to portrait orientation, it computes sensor height (long dimension) as 5.84 mm and the distance computes 2.33 meters, using the numbers we can guess at.

You are missing something big. The size of the camera sensor is not mentioned. You need to know it, both in mm and in pixels. You didn't say any sizes, but Samsung says 3.7 megapixels, so if 4:3, that is 2221 x 1666 pixels. Samsung specs don't say. Your image will be this size though, you can know its pixel dimensions.

The sensor mm is pretty difficult to determine on most phones. At most, the Samsung Note 4 says it is a 1/2.6" sensor, but this is a fake number, not a real dimension of anything. Wikipedia says a Nokia 1/2.5" is 5.76 x 4.29 mm, but that's not real helpful. All we know though.

Not sure what you are trying to calculate, you seem to know both the size of the object and its distance. The formula you found calculates distance, not size. Here is a calculator that also computes distance, not size. http://www.scantips.com/lights/subjectdistance.html

Both require knowing sensor size, in mm and in pixels. If you knew crop factor, the calculator can compute sensor size in mm. I dare say this is is unknown too though.

Sensor height 4.29mm
Focal length 4.8mm
Sensor size 1667 pixels
Subject size 596 pixels
Subject height 0.9 meters

Then Subject Distance 2.82 meters

So these numbers from plugging in your numbers and my guesses, it computes distance as 2.82 meters, which you said was 2.3 meters. Seems halfway close, since we don't know the numbers.

This works better with bigger cameras for which we actually know specs.

EDIT: Your detailed Exif helps.

It says Image Size : 5312x2988
Megapixels : 15.9
Focal Length : 4.8 mm (35 mm equivalent: 31.0 mm)

Not 3.7 megapixels anymore. :) And 5312x2988 is 1.78 aspect (HDTV). So calculator says with camcorder crop factor of 31/4.8 = 6.48x (compared to 35mm film). We know the size of 35 mm, so using diagonals, it computes sensor height to necessarily be 5.84 mm height.

Other sources say Samsung 1/2.6" is 5.5x4.1 mm (4:3), close to Scott's numbers (but his is 1.44:1, which may be a typo?). I am not aware of where Samsung says it. However your image size says 5312x2988 which is 1.78:1 HD, camcorder mode. That wider image is necessarily shorter height.

Anyway, from that, and corrected to portrait orientation, it computes sensor height (long dimension) as 5.84 mm and the distance computes 2.33 meters, using the numbers we can guess at.

http://www.scantips.com/g2/dist2.png

You are missing something big. The size of the camera sensor is not mentioned. You need to know it, both in mm and in pixels. You didn't say any sizes, but Samsung says 3.7 megapixels, so if 4:3, that is 2221 x 1666 pixels. Samsung specs don't say. Your image will be this size though, you can know its pixel dimensions.

The sensor mm is pretty difficult to determine on most phones. At most, the Samsung Note 4 says it is a 1/2.6" sensor, but this is a fake number, not a real dimension of anything. Wikipedia says a Nokia 1/2.5" is 5.76 x 4.29 mm, but that's not real helpful. All we know though.

Not sure what you are trying to calculate, you seem to know both the size of the object and its distance. The formula you found calculates distance, not size. Here is a calculator that also computes distance, not size. http://www.scantips.com/lights/subjectdistance.html

Both require knowing sensor size, in mm and in pixels. If you knew crop factor, the calculator can compute sensor size in mm. I dare say this is is unknown too though.

Sensor height 4.29mm
Focal length 4.8mm
Sensor size 1667 pixels
Subject size 596 pixels
Subject height 0.9 meters

Then Subject Distance 2.82 meters

So these numbers from plugging in your numbers and my guesses, it computes distance as 2.82 meters, which you said was 2.3 meters. Seems halfway close, since we don't know the numbers.

This works better with bigger cameras for which we actually know specs.

EDIT: Your detailed Exif helps.

It says Image Size : 5312x2988
Megapixels : 15.9
Focal Length : 4.8 mm (35 mm equivalent: 31.0 mm)

Not 3.7 megapixels anymore. :) And 5312x2988 is 1.778 aspect (HDTV). So calculator says with camcorder crop factor of 31/4.8 = 6.48x (compared to 35mm film). We know the size of 35 mm, so using diagonals, it computes sensor height to be 3.28mm height.

Other sources say Samsung 1/2.6" is 5.5x4.1 mm (4:3), close to Scott's numbers (but 1.44:1, which may be a typo?). I am not aware of where Samsung says it. However your image size says 5312x2988 which is 1.78:1 HD, camcorder mode. That wider image is necessarily shorter height.

Anyway, from that, and corrected to portrait orientation, it computes sensor height (long dimension) as 5.84 mm and the distance computes 2.33 meters, using the numbers we can guess at.

You are missing something big. The size of the camera sensor is not mentioned. You need to know it, both in mm and in pixels. You didn't say any sizes, but Samsung says 3.7 megapixels, so if 4:3, that is 2221 x 1666 pixels. Samsung specs don't say. Your image will be this size though, you can know its pixel dimensions.

The sensor mm is pretty difficult to determine on most phones. At most, the Samsung Note 4 says it is a 1/2.6" sensor, but this is a fake number, not a real dimension of anything. Wikipedia says a Nokia 1/2.5" is 5.76 x 4.29 mm, but that's not real helpful. All we know though.

Not sure what you are trying to calculate, you seem to know both the size of the object and its distance. The formula you found calculates distance, not size. Here is a calculator that also computes distance, not size. http://www.scantips.com/lights/subjectdistance.html

Both require knowing sensor size, in mm and in pixels. If you knew crop factor, the calculator can compute sensor size in mm. I dare say this is is unknown too though.

Sensor height 4.29mm
Focal length 4.8mm
Sensor size 1667 pixels
Subject size 596 pixels
Subject height 0.9 meters

Then Subject Distance 2.82 meters

So these numbers from plugging in your numbers and my guesses, it computes distance as 2.82 meters, which you said was 2.3 meters. Seems halfway close, since we don't know the numbers.

This works better with bigger cameras for which we actually know specs.

EDIT: Your detailed Exif helps.

It says Image Size : 5312x2988
Megapixels : 15.9
Focal Length : 4.8 mm (35 mm equivalent: 31.0 mm)

Not 3.7 megapixels anymore. :) And 5312x2988 is 1.78 aspect (HDTV). So calculator says with camcorder crop factor of 31/4.8 = 6.48x (compared to 35mm film). We know the size of 35 mm, so using diagonals, it computes sensor height to necessarily be 5.84 mm height.

Other sources say Samsung 1/2.6" is 5.5x4.1 mm (4:3), close to Scott's numbers (but his is 1.44:1, which may be a typo?). I am not aware of where Samsung says it. However your image size says 5312x2988 which is 1.78:1 HD, camcorder mode. That wider image is necessarily shorter height.

Anyway, from that, and corrected to portrait orientation, it computes sensor height (long dimension) as 5.84 mm and the distance computes 2.33 meters, using the numbers we can guess at.