Patent ID: 7583844

Claim:
Method, comprising: at a consumer electronic device, providing compressed image data in a compressed domain obtained from image data in a spatial domain by a subband encoder, in particular based on a wavelet transform; at the consumer electronic device, providing a transformed linear function F(k) in the compressed domain of a linear function ƒ(k) defined in the spatial domain, wherein the transformed linear function F(k) is obtainable by transforming the linear function ƒ(k) from the spatial domain into the compressed domain, wherein the linear function ƒ(k) is composed of at least one out of a group comprising at least one linear offset K and at least one linear scaling factor λ, wherein the linear function ƒ(k) is applicable to the image data in the spatial domain to obtain modified image data in the spatial domain; and at the comsumer electronic device, applying the transformed linear function F(k) to a defined number of subbands of the compressed image data for modifying the image data in the compressed domain resulting in modified subbands.