| OCR Text |
Show white Polaroid final compensation The in by 2 when of as n The value of densities will be that for However the 1 a is look from object. in the' computed white . for in For 'of a the grey as of n3 ' the = This Chapter logarithm of 'the intensity. For image. image (nl/2) a black of time The rQw. a a linear function material, a to a white, it is desired that the. corresponding shading be' grey c alle.d Perception" shading a mater i.al simulated material corresponding is brightness lion "Visual the point each Therefore, When that this mater] al photogr aphie a brightness level. a e ach value n2: is black as as color, half way be image neutr.al expected. With the previous compensation table, the entry log (n 1 12) density value which is not the the table subjective gives the density brightness brightness corresponding lighter. as in next synthetic image, the shading of white material, it is desired shading between black and a the output intensity R is and has been defined in the generated a n, the displayed . non-linearity of computed obtained and it is desired that possible. the to square linearly increasing production model is linear function one then a A l.4b). (Figure to each square is divided corresponding n input intensity an subjective brightness a be obtained from the filM correction This compensation for assumes of n, can going right to left corresponding . curve Gamma, of Knowing the value stepwedge using the final compensation table is new A1.2a. Figure 52 is shown in Figure A1.4a. type is mean a a linear to n3 '= . give ' a density for black and white densities, because linear function of the as will function, of logarithm the of density, n.· the A the subjective (n l-n2) 1 2 is not grey but actually appears mych |
