Because pixels are two-dimensional, you cannot directly convert a single pixel to linear millimeters without knowing the screen or sensor's or DPI (Dots Per Inch) . To find the area of a single pixel in mm2mm squared , use the following multi-step formula: Find the linear millimeter size of one pixel side:
Area of 1 Pixel (mm2)=Pixel Width (mm)×Pixel Height (mm)Area of 1 Pixel open paren m m squared close paren equals Pixel Width (mm) cross Pixel Height (mm) 3. Multiply by Total Pixels pixel value mm2 new
The formula is simple: [ \textPixel Value (mm²) = \left(\frac\textReal-World Length (mm)\textLength in Pixels\right)^2 ] The object covers
Total Area (mm2)=Total Pixel Count×Pixel Area(mm2)Total Area open paren m m squared close paren equals Total Pixel Count cross Pixel Area open paren m m squared close paren You have a photo of a leaf. The object covers .Your calibration shows that Area of one pixel Total Area 3. How to Calibrate Your Images (Finding the "New" Value) To get an accurate mm2m m squared Because pixels are two-dimensional