公开(公告)号：US20190096042A1

公开(公告)日：2019-03-28

申请号：US15927820

申请日：2018-03-21

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Rajasekhar Reddy Allu ,  Niraj Nandan ,  Mihir Narendra Mody ,  Gang Hua ,  Brian Okchon Chae ,  Shashank Dabral ,  Hetul Sanghvi ,  Vikram VijayanBabu Appia ,  Sujith Shivalingappa

IPC: G06T5/00 ,  G06T3/00

Abstract: A method for geometrically correcting a distorted input frame and generating an undistorted output frame includes capturing and storing an input frame in an external memory, allocating an output frame with an output frame size and dividing the output frame into output blocks, computing a size of the input blocks in the input image corresponding to each output blocks, checking if the size of the input blocks is less than the size of the internal memory and if not dividing until the required input block size of divided sub blocks is less than the size of the internal memory, programming an apparatus with input parameters, fetching the input blocks into an internal memory, processing each of the divided sub blocks sequentially and processing the next output block in step until all the output blocks are processed; and composing the output frame for each of the blocks in the output frame.

公开(公告)号：US10121231B2

公开(公告)日：2018-11-06

申请号：US15183459

申请日：2016-06-15

Applicant: Texas Instruments Incorporated

Inventor： Mihir Narendra Mody ,  Shashank Dabral ,  Jesse Gregory Villarreal, Jr. ,  William Wallace ,  Niraj Nandan

IPC: G06K9/00 ,  G06T5/00 ,  G06T5/20 ,  G06K9/46

Abstract: A method for filtering noise for imaging includes receiving an image frame having position and range data. A filter size divides the frame into filter windows for processing each of the filter windows. For the first pixel, a space to the center pixel and a range difference between this pixel and the center pixel is determined and used for choosing a selected weight from weights in a 2D weight LUT including weighting for space and range difference, a filtered range value is calculated by applying the selected 2D weight to the pixel, and the range, filtered range value and selected 2D weight are summed. The determining, choosing, calculating and summing are repeated for at least the second pixel. A total sum of contributions from the first and second pixel are divided by the sum of selected 2D weights to generate a final filtered range value for the center pixel.

公开(公告)号：US09871965B2

公开(公告)日：2018-01-16

申请号：US15183495

申请日：2016-06-15

Applicant: Texas Instruments Incorporated

Inventor： Shashank Dabral ,  Mihir Narendra Mody ,  Gang Hua ,  Anthony Lell ,  Niraj Nandan ,  Rajashekhar Allu

IPC: H04N5/232 ,  H04N5/235 ,  H04N5/355 ,  H04N5/367 ,  H04N9/04 ,  H04N5/265 ,  G06T5/00

CPC classification number: H04N5/23232 ,  G06T5/008 ,  G06T2207/20208 ,  H04N5/2353 ,  H04N5/2355 ,  H04N5/2356 ,  H04N5/265 ,  H04N5/35572 ,  H04N5/3675 ,  H04N9/045 ,  H04N2201/0084

Abstract: A signal processing chain implements wide dynamic range (WDR) multi-frame processing including receiving raw image signals from a WDR sensor including a plurality of frames including a first frame including first exposure time pixel data and a second frame including second exposure time pixel data. Statistics for camera control are generated including first statistics for the first pixel data and second statistics for the second pixel data. The first and second pixel data are merged using WDR merge algorithm in a WDR merge block which utilizes the first and second statistics to generate a raw higher bit width single frame image. The single frame image is post-processed in post-processing block using at least a defect pixel correction algorithm, and at least a portion of tone mapping is performed on the single frame image after the post-processing to provide an output toned mapped image.

公开(公告)号：US20170195564A1

公开(公告)日：2017-07-06

申请号：US15298214

申请日：2016-10-19

Applicant: Texas Instruments Incorporated

Inventor： Vikram VijayanBabu Appia ,  Sujith Shivalingappa ,  Brijesh Rameshbhai Jadav ,  Hemant Hariyani ,  Shashank Dabral ,  Mayank Mangla

IPC: H04N5/232 ,  H04N7/18 ,  H04N5/247 ,  B60R1/00 ,  G06T15/20 ,  G06T15/06 ,  G06T17/20 ,  G06T7/00 ,  G06T3/00 ,  G06T19/20

CPC classification number: H04N5/23238 ,  B60R1/00 ,  B60R2300/105 ,  B60R2300/202 ,  B60R2300/306 ,  B60R2300/802 ,  G06T3/0093 ,  G06T15/06 ,  G06T15/205 ,  H04N5/247 ,  H04N5/3572 ,  H04N7/181 ,  H04N9/045

Abstract: A method for displaying a surround view on a single display screen is disclosed. A plurality of image frames for a particular time may be received from a corresponding plurality of cameras. A viewpoint warp map corresponding to a predetermined first virtual viewpoint may be selected, wherein the viewpoint warp map defines a source pixel location in the plurality of image frames for each output pixel location in the display screen. The warp map was predetermined offline and stored for later use. An output image is synthesized for the display screen by selecting pixel data for each pixel of the output image from the plurality of image frames in accordance with the viewpoint warp map. The synthesized image is then displayed on a display screen.

公开(公告)号：US20160148356A1

公开(公告)日：2016-05-26

申请号：US14550671

申请日：2014-11-21

Applicant: Texas Instruments Incorporated

Inventor： Shashank Dabral ,  Hamid Rahim Sheikh ,  Rajasekhar Reddy Allu

IPC: G06T5/00 ,  G06T9/00

CPC classification number: G06T9/00 ,  G06T1/20 ,  G06T5/007 ,  G06T2207/20208

Abstract: An image processor capable of processing wide-dynamic-range (WDR) image data using a native 12-bit image pipe. In one embodiment, the processor receives compressed wide-dynamic-range image data from a WDR image sensor. The compressed wide-dynamic-range image data is decompanded. Long-exposure image data is then extracted from the decompanded image data, and pre-processing is performed on the long-exposure image data. Short-exposure image data is also extracted from the decompanded image data, and pre-processing is performed on the short-exposure image data. The pre-processed long-exposure image data is merged with the pre-processed short-exposure image data. Tone mapping is performed on the merged image data.

Abstract translation: 能够使用原生12位图像管道处理宽动态范围（WDR）图像数据的图像处理器。 在一个实施例中，处理器从WDR图像传感器接收压缩的宽动态范围图像数据。 压缩的宽动态范围图像数据被解压缩。 然后从解压缩的图像数据中提取长曝光图像数据，并对长曝光图像数据进行预处理。 还从解压缩的图像数据中提取短曝光图像数据，并对短曝光图像数据进行预处理。 预处理的长曝光图像数据与预处理的短曝光图像数据合并。 对合并的图像数据执行色调映射。