I am trying to make a term for a function equipped on an image sensor. The term is to express "the upper limit of fluctuation allowance in image size which is specified in %"

The value of percentage does not express the ratio of the enlarged image size compared to the original image size, so for example, 150% does not mean that the sensor will only detect a 150% bigger image to the original image.

Instead, it is to express the range of percentage of size fluctuation for sensor to accept to detect the shape (image) which makes 150% to mean that the sensor will detect an upscaled original image in all upscaling rate from 101% to 150%, such as a 102%, 117%, or 142% bigger image to the original image.

Does any of the followings describe the concept well? If not, what is the problem?

  • Maximum size fluctuation allowance percentage
  • Maximum size volatility allowance percentage


  • Size fluctuation allowance percentage upper limit
  • Size volatility allowance percentage upper limit

Or, maybe "percentage" better be "rate"? Also, all of the candidates seem redundant. Any term to combine some words?

Thank you in advance.

  • How about "Image rescaling detection cap"?
    – Dan Bron
    Commented Feb 19, 2015 at 11:06
  • 1
    Maximum Scaling Factor?
    – Marv Mills
    Commented Feb 19, 2015 at 11:25
  • @Dan, does "cap" stand for "upper limit"? Is it used commonly? If so, it is a good term to know for me.
    – Jun Kyoto
    Commented Feb 20, 2015 at 0:09
  • @Marv, when I look up "scale factor" on Wikipedia, it says it is "coefficient". Does it also imply "range"? Because the substance of the concept of what I am trying to explain is "limit of range (allowance)".
    – Jun Kyoto
    Commented Feb 20, 2015 at 0:10
  • @Jun Yes, it does, and it is common.
    – Dan Bron
    Commented Feb 20, 2015 at 0:13

2 Answers 2


Generally there is an argot associated with items of a technical nsture. You're not the first, I'd suggest, who has come up with an image sensor. A useful port of call is to look at the technical reports that go along with image sensors to see how manufacturers are already referring to such 'fluctuation' ranges ...

  • This is the best answer so far. Image sensors come in many forms, and the question doesn’t provide enough context. It sounds like the system is supposed to detect a reference shape in an arbitrary input image, and that the analogous shape in the input image can vary in size. Problems like this have been around for fifty years. The literature around them will have the terminology for sure.
    – user205876
    Commented Aug 30, 2021 at 15:10

A rather technical term may be maximum absolute deviation

"The maximum absolute deviation around an arbitrary point is the maximum of the absolute deviations of a sample from that point."1

In your case, that point should refer to the true value. For example, your image sensors is applied on something of size 10, it measures 15, then the absolute deviation for that measurement (measurement implies comparing with true value) is |15-10|=5.

You also distinguish between upper and lower deviations. You might replace absolute by upper and lower to indicate that. An example of that is done engineering:

"Upper deviation: the difference between the maximum possible component size and the basic size."2

"Lower deviation: the difference between the minimum possible component size and the basic size."2

So you would use maximum upper deviation and maximum lower deviation.

Of course you could always express this percentually, you could then speak of maximum upper percent deviation and maximum lower percent deviation, 'percent deviation' is also use here3.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.