# US 9,438,821 B1 · Method for applying multi-layered film grain and texture mapping to a digital video image > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,438,821 B1 - Document ID: US9438821B1 - Status: Granted - Kind: B1 - Application number: 14/683,611 - Filed: 2015-04-10 - Granted: 2016-09-06 - Earliest claimed: 2014-04-11 - Applicants: Suny Behar Parker - Inventors: Suny Behar Parker - Web page: https://patentgrep.com/patent/US9438821B1 ## CPC - G06V 10/60: relating to illumination properties, e.g. using a reflectance or lighting model - G06T 5/00: Image enhancement or restoration - G06T 7/11: Region-based segmentation - G06T 7/40: Analysis of texture (depth or shape recovery from texture G06T7/529) - G06V 20/46: {Extracting features or characteristics from the video content, e.g. video fingerprints, representative shots or key frames} - H04N 5/265: Mixing - G06T 2207/10016: Video; Image sequence - G06T 2207/20204: Removing film grain; Adding simulated film grain - G06V: IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING - G06T: IMAGE DATA PROCESSING OR GENERATION, IN GENERAL - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION ## Abstract A method for processing digital video to have grain corresponding to a motion picture film, the method having the steps of: receiving a plurality of different grain assets corresponding to different film exposure levels; receiving a digital video image; separating the digital video image into a plurality of luminance delineated matte images; adding a different grain asset to each of the plurality of luminance delineated matte images to create a plurality of asset plates; and combining the plurality of asset plates to form a final digital video image. ## Claims ### Claim 1 A method for processing digital video to have grain corresponding to a motion picture film, the method comprising: receiving a plurality of different grain assets corresponding to different film exposure levels; receiving a digital video image; separating the digital video image into a plurality of luminance delineated matte images; adding a different grain asset to each of the plurality of luminance delineated matte images to create a plurality of asset plates; and combining the plurality of asset plates to form a final digital video image. ### Claim 2 (depends on 1) The method of claim 1 wherein there are three different grain assets corresponding to different film exposure levels and the digital video image is divided into three luminance delineated matte images. ### Claim 3 (depends on 2) The method of claim 2 wherein a first grain asset corresponds to a toe of a DLogE curve for the motion picture film; a second grain asset corresponds to a straight line of the DLogE curve for the motion picture film; and a third grain asset corresponds to a shoulder of the DLogE curve for the motion picture film; and wherein a first luminance delineated matte image has luminance values corresponding to the toe of the DLogE curve for the motion picture film; a second luminance delineated matte image has luminance values corresponding to the straight line of the DLogE curve for the motion picture film; and a third luminance delineated matte image has luminance values corresponding to the shoulder of the DLogE curve for the motion picture film. ### Claim 4 (depends on 1) The method of claim 1 wherein there are five different grain assets corresponding to different film exposure levels and the digital video image is divided into five luminance delineated matte images. ### Claim 5 (depends on 4) The method of claim 4 wherein a first grain asset corresponds to a shadow portion of a DLogE curve for the motion picture film; a second grain asset corresponds to a low mid portion of the DLogE curve for the motion picture film; a third grain asset corresponds to a midtones portion of the DLogE curve for the motion picture film; a fourth grain asset corresponds to a high mid portion of the DLogE curve for the motion picture film; and a fifth grain asset corresponds to a highlights portion of the DLogE curve for the motion picture film; and wherein a first luminance delineated matte image has luminance values corresponding to the shadow portion of the DLogE curve for the motion picture film; a second luminance delineated matte image has luminance values corresponding to the low mid portion of the DLogE curve for the motion picture film; a third luminance delineated matte image has luminance values corresponding to the midtones portion of the DLogE curve for the motion picture film; a fourth luminance delineated matte image has luminance values corresponding to the high mids portion of the DLogE curve for the motion picture film; and a fifth luminance delineated matte image has luminance values corresponding to the highlights portion of the DLogE curve for the motion picture film. ### Claim 6 (depends on 1) The method of claim 1 further comprising: receiving a film type. ### Claim 7 (depends on 1) The method of claim 1 further comprising: receiving at least one threshold modification for separating the digital video image into a plurality of luminance delineated matte images. ### Claim 8 (depends on 7) The method of claim 7 further comprising: receiving at least one grain application modification for changing at least one of the group consisting of: opacity, gain, sizing or softness of grain asset application to at least one of the plurality of luminance delineated matte images. ### Claim 9 (depends on 7) The method of claim 7 further comprising: displaying an augmented digital video image wherein each of the plurality of luminance delineated matte images are displayed in a different color. ### Claim 10 (depends on 9) The method of claim 9 further comprising: redisplaying the augmented digital video image to reflect the received at least one threshold modification for separating the digital video image into a plurality of luminance delineated matte images. ### Claim 11 (depends on 9) The method of claim 9 further comprising: redisplaying the augmented digital video image to reflect the received at least one grain application modification. ### Claim 12 A non-transitory computer readable medium containing program instructions for causing a computer to perform a method for processing digital video to have grain corresponding to a motion picture film comprising the steps of: receiving a plurality of different grain assets corresponding to different film exposure levels; receiving a digital video image; separating the digital video image into a plurality of luminance delineated matte images; adding a different grain asset to each of the plurality of luminance delineated matte images to create a plurality of asset plates; and combining the plurality of asset plates to form a final digital video image. ### Claim 13 (depends on 12) The non-transitory computer readable medium of claim 12 wherein there are three different grain assets corresponding to different film exposure levels and the digital video image is divided into three luminance delineated matte images. ### Claim 14 (depends on 12) The non-transitory computer readable medium of claim 12 wherein there are five different grain assets corresponding to different film exposure levels and the digital video image is divided into five luminance delineated matte images. ### Claim 15 (depends on 12) The non-transitory computer readable medium of claim 12 further comprising program instructions for causing a computer to receive a film type. ### Claim 16 (depends on 12) The non-transitory computer readable medium of claim 12 further comprising program instructions for causing a computer to receive at least one threshold modification for separating the digital video image into a plurality of luminance delineated matte images. ### Claim 17 (depends on 16) The non-transitory computer readable medium of claim 16 further comprising program instructions for causing a computer to receive at least one grain application modification for changing at least one of the group consisting of: opacity, gain, sizing or softness of grain asset application to at least one of the plurality of luminance delineated matte images. ### Claim 18 (depends on 16) The non-transitory computer readable medium of claim 16 further comprising program instructions for causing a computer to display an augmented digital video image wherein each of the plurality of luminance delineated matte images are displayed in a different color. ### Claim 19 (depends on 16) The non-transitory computer readable medium of claim 16 further comprising program instructions for causing a computer to redisplay the augmented digital video image to reflect the received at least one threshold modification for separating the digital video image into a plurality of luminance delineated matte images. ### Claim 20 A system for processing digital video to have grain corresponding to a motion picture film, the method comprising: a means for receiving a plurality of different grain assets corresponding to different film exposure levels; a means for receiving a digital video image; a means for separating the digital video image into a plurality of luminance delineated matte images; a means for adding a different grain asset to each of the plurality of luminance delineated matte images to create a plurality of asset plates; and a means for combining the plurality of asset plates to form a final digital video image.