Abstract: A method for estimating a bit rate and the distortion of at least one compressed image using at least one wavelet transform operation delivering at least one sub-band b containing coefficients, said sub-band being subdivided into at least one packet of coefficients associated with a compression quality layer, said packet also including a packet header and being transmitted through a propagation channel, said method including estimating a distortion Dbc linked to a compression of the coefficients of said packet, estimating a distortion D?bc linked to a corruption or loss of said packet, estimating a compression bit rate Lb, estimating a sensitivity {tilde over (D)}bc of said packet according to Dbc and D?bc and the bit rate Lb, and estimating a distortion of said image linked to a decompression of said packet based on {tilde over (D)}bc.

Abstract: A method for estimating a bit rate and the distortion of at least one compressed image using at least one wavelet transform operation delivering at least one sub-band b containing coefficients, said sub-band being subdivided into at least one packet of coefficients associated with a compression quality layer, said packet also including a packet header and being transmitted through a propagation channel, said method including estimating a distortion Dbc linked to a compression of the coefficients of said packet, estimating a distortion D?bc linked to a corruption or loss of said packet, estimating a compression bit rate Lb, estimating a sensitivity {tilde over (D)}bc of said packet according to Dbc and D?bc and the bit rate Lb, and estimating a distortion of said image linked to a decompression of said packet based on {tilde over (D)}bc.

Abstract: A method of display control using portable equipment (602) provided with an image sensor including the capture of a series of images; the estimate of the movement made in the displacement of the portable equipment; and the modification of the display according to the movement estimate, according to the invention, in which the movement estimate includes: a) the selection of at least one first (10) and at least one second image; b) the application to the first image of a set of predictive displacements (10d, 10g, 10h, 10b, 10nd, 10bd, 10hg, 10bg); c) the calculation and comparison of the value of at least one characteristic of the first image assigned respectively with each of the predictive displacements with the value of the same characteristic of the second imaged; d) the determination of the predictive displacement (dp) leading to a value of the characteristic, closest to that of the second image; and e) use of the predictive displacement determined in step d as the movement estimate.

Abstract: The invention relates to a method of annotation of images captured by a digital camera equipped with a previewing means, comprising: the supply with the camera of an operating mode enabling a user to select one image (12) to be annotated, and to capture at least one additional previewed image; the automatic extraction (20) of an annotation (A) from the additional image; and the creation (22) of a new image by combining the annotation (A) and the image to be annotated (12), while respecting, in the new image, a location and enlargement ratio of the annotation virtually identical to those of the annotation in the additional image.

Abstract: A method for automatically editing video sequences to produce lenticular grid hardcopies, includes the selection of a first set of images in a shot image sequence; the assignment to each image of the image set of an individual quality factor as a function of image characteristics; the selection of at least one new image set by replacing at least one image of the previously selected image set by a new image of the shot sequence; the preparation of image data to form a lenticular grid hardcopy, based on an image set taken from among the previously selected image sets and with the highest overall quality factor, the overall quality factor being a function of the individual quality factors of the images of each selected image set.

Abstract: A method of analyzing a digital video clip captured by a camera to determine candidate frames for subsequent key frame selection including providing a camera motion sensor in the camera so that information is provided during image capture regarding camera motion including translation of the scene or camera, or scaling of the scene; forming a plurality of video segments based on the global motion estimate and labeling each segment in accordance with a predetermined series of camera motion classes; extracting key frame candidates from the labeled segments and computing a confidence score for each candidate by using rules corresponding to each camera motion class and a rule corresponding to object motion.

Abstract: A method of analyzing a digital video clip to determine candidate frames for subsequent key frame selection including performing a global motion estimate on the video clip that indicates translation of the scene or camera, or scaling of the scene; forming a plurality of video segments based on the global motion estimate and labeling each segment in accordance with a predetermined series of camera motion classes; extracting key frame candidates from the labeled segments and computing a confidence score for each candidate by using rules corresponding to each camera motion class and a rule corresponding to object motion.

Abstract: A method for processing a digital color image for display and transmission includes the steps of (a) resizing the image to a lower display resolution to produce a display-sized image, (b) quantizing the display-sized image to a display palette with an error diffusion process to produce an error diffused image, (c) losslessly compressing the error diffused image to produce a compressed image having a particular file size, (d) comparing the file size to a maximum file size and if less than the maximum file size, transmitting the digital image to the display; (e) if the file size is greater than the maximum file size but less than a another predetermined file size, reducing the error diffusion rate by a predetermined amount in order to reduce the file size; and (f) if the file size is greater than the maximum file size and the predetermined file size, simplifying the resized image by reducing image detail to produce a simplified image and repeating the preceding steps on the simplified image.

Abstract: A method for processing a digital color image for display and transmission includes the steps of (a) resizing the image to a lower display resolution to produce a display-sized image, (b) quantizing the display-sized image to a display palette with an error diffusion process to produce an error diffused image, (c) losslessly compressing the error diffused image to produce a compressed image having a particular file size, (d) comparing the file size to a maximum file size and if less than the maximum file size, transmitting the digital image to the display; (e) if the file size is greater than the maximum file size but less than a another predetermined file size, reducing the error diffusion rate by a predetermined amount in order to reduce the file size; and (f) if the file size is greater than the maximum file size and the predetermined file size, simplifying the resized image by reducing image detail to produce a simplified image and repeating the preceding steps on the simplified image.