公开(公告)号：US07092572B2

公开(公告)日：2006-08-15

申请号：US10113810

申请日：2002-03-29

申请人： Shuangying Huang ,  Teh-Ming Hsieh ,  Tat Leung Chung ,  Lie-Hwang Hwang

发明人： Shuangying Huang ,  Teh-Ming Hsieh ,  Tat Leung Chung ,  Lie-Hwang Hwang

IPC分类号： G06K9/68

CPC分类号： G06T7/001 ,  G06T15/00

摘要： A method and apparatus are disclosed for testing the accuracy of digital test images generated by a computer graphics program executed on a computer graphics system. A test program is utilized to compare the test image with a reference image. The user defines regions of interest and a maximum error for each region. This allows the user to focus on a particular object or group of objects. Global image quantification verification generates one measurement of error or image difference for each region of the test image. Each region is divided into sub-regions and an average color value is calculated for each sub-region and the corresponding sub-region in the reference image. The differences between the averages for corresponding sub-regions in the test and reference images are calculated. A test image region may be unacceptably different from a reference image if a normalized sum of the absolute differences exceeds the maximum error.

公开(公告)号：US06961468B2

公开(公告)日：2005-11-01

申请号：US10113954

申请日：2002-03-29

申请人： Shuangying Huang ,  Tat Leung Chung ,  Teh-Ming Hsieh ,  Lie-Hwang Hwang

发明人： Shuangying Huang ,  Tat Leung Chung ,  Teh-Ming Hsieh ,  Lie-Hwang Hwang

IPC分类号： G06T7/00 ,  G06T15/00 ,  G06K9/68

CPC分类号： G06T7/001 ,  G06T15/00

摘要： A method and apparatus are disclosed for testing the accuracy of digital images generated by a computer graphics program executed on a computer graphics system. A test program is utilized to compare test images with a set of reference images. Adaptive local image quantification verification aims at an image comparison that allows specified color value and spatial shifts. The color value for each pixel of a specified portion of the test image is compared to the average color value of an offset array of pixels in a reference image. A test image region may be unacceptably different from a reference image, if for any pixel of the test image region an offset reference image array is not found that has an array size, absolute color value difference, and spatial shift less than specified maximums.

摘要翻译： 公开了一种用于测试由计算机图形系统上执行的计算机图形程序产生的数字图像的精度的方法和装置。 使用测试程序将测试图像与一组参考图像进行比较。 自适应局部图像定量验证旨在实现允许指定颜色值和空间偏移的图像比较。 将测试图像的指定部分的每个像素的颜色值与参考图像中的像素的偏移阵列的平均颜色值进行比较。 如果对于测试图像区域的任何像素没有发现具有阵列尺寸，绝对色值差异和小于指定最大值的空间位移的偏移参考图像阵列，则测试图像区域可能不能接受地与参考图像不同。

公开(公告)号：US07076101B2

公开(公告)日：2006-07-11

申请号：US10076118

申请日：2002-02-14

申请人： Tat Leung Chung ,  The-Ming Hsieh ,  Shuangying Huang ,  Lie-Hwang Hwang

发明人： Tat Leung Chung ,  The-Ming Hsieh ,  Shuangying Huang ,  Lie-Hwang Hwang

IPC分类号： G06K9/68 ,  H04N7/18

CPC分类号： G06T7/001 ,  G06T7/0002

摘要： A method and apparatus are disclosed for testing the accuracy of digital test images by comparing the value of each test image pixel with the average value of a corresponding reference image pixel array. The local image quantification verification test program accepts absolute differences between corresponding pixel and array values that are less than a specified difference maximum. The user may specify a difference maximum and a maximum array size, and may restrict the test image comparison to specified regions of the test image with specific difference tolerances for each region. This allows the user to focus the comparison on certain regions as more important than others and to focus a region on a particular object or group of objects.