| OCR Text |
Show 22 transparency. analogy is a At As stated relatively the final generated image II. 2 will such a representation of the step system, subjective a is done; it is then necessary to be by light intensity practice in image technology. new brightness with respect brightness by Stockham, to the density discussed in the of to define the attempt The image. I Appendix notion subjective of subjective Table." "Compensation on the of interpretation A model for human vision A large set of psychophysical observations done experiments on with , . simple animal intensity eyes input to have the visual approximatively, logarithmic. was presented by Fuortes discussion or treatment that suggested Physiological in see receptors' 1959 and logarithmic its. capability of explains adaptation constant ratio, which presented to the the case 1961 close to large range of a of environment the output ( For a constant change when The eye in intensities. means eye, it where the two that, can parts when tell if they a light level is supposition more detailed logarithmic sensitivity. of sensitivity stimulus the is usually two-part are have different both, eye differences is of intensities, in changed a percentage rather than to referred to field of different of the Also several lighting. just-perceptible In other words, the eye is sensitive to changes detector ," in were the to neural between two stimuli have shown that, at central range of the eye tends to indicate absolute the the Similar experiments with human beings the experiments done in the. determination intensities and between evidence to support this Cornsweet). model relationship Rushton and have been performed and the results found The the same intensities, the intensity eye can as a "zero intensities. is or not. In determine the |
