IQA Rule Test Operations
Table 1 describes the IQA test operations that Image
Compliance performs.
| Image Quality Analysis validation test | Applies to | Description | Test value |
|---|---|---|---|
| Compressed Data Low | All views | Verifies that the compressed image is at least a specified minimum size | The minimum number of bytes for the image |
| Compressed Data High | All views | Verifies that the compressed image is no larger than a specified maximum size | The maximum number of bytes for the image |
| Document Length Low | All views | Verifies that the image length is at least a specified minimum length | The length, in inches, of the length of the image |
| Document Length High | All views | Verifies that the image length is no longer than a specified maximum length | The length, in inches, of the length of the image |
| Document Height Low | All views | Verifies that the image height is at least a specified minimum height | The length, in inches, of the height of the image |
| Document Height High | All views | Verifies that the image height is no higher than a specified maximum height | The length, in inches, of the height of the image |
| Document Length Mismatch | All views | Verifies that the length of the front image is close to the length of the back image | The maximum dimension difference, in inches |
| Document Height Mismatch | All views | Verifies that the height of the front image is close to the height of the back image | The maximum dimension difference, in inches |
| Upper Left Corner Missing | All views | Verifies that the image has the upper left corner of the document | Specify the maximum size of the corner that is allowed to be missing. It is the length, in inches, of the side of the largest square that fits in the missing corner region. |
| Upper Right Corner Missing | All views | Verifies that the image has the upper right corner of the document | Specify the maximum size of the corner that is allowed to be missing. It is the length, in inches, of the side of the largest square that fits in the missing corner region. |
| Lower Left Corner Missing | All views | Verifies that the image has the lower left corner of the document | Specify the maximum size of the corner that is allowed to be missing. It is the length, in inches, of the side of the largest square that fits in the missing corner region. |
| Lower Right Corner Missing | All views | Verifies that the image has the lower right corner of the document | Specify the maximum size of the corner that is allowed to be missing. It is the length, in inches, of the side of the largest square that fits in the missing corner region. |
| Skew | Front view | Verifies that the document skew angle, which is the angle between the bottom of the scan and the bottom of the document, is not larger the specified maximum skew angle | Specify the maximum skew angle, in degrees. Valid values are 0.00 to 8.00. |
| Darkness Low | Black and white view | Verifies that the black and white image black pixel count meets a specified minimum portion | Specify the minimum darkness level as a fraction from 0.0 (no black pixels) to 1.0 (all black pixels) |
| Darkness High | Black and white view | Verifies that the black and white image black pixel count meets a specified maximum portion | Specify the maximum darkness level as a fraction from 0.0 (no black pixels) to 1.0 (all black pixels) |
| Noise | Black and white view | Verifies that the density of black noise spots present in the black and white image meets a specified maximum. It is performed in the right quarter of the image. | Specify how noisy the image is from 0 to 2000 |
| Streak | All views | Verifies that the width of the widest image streak is less than the specified maximum | Specify the width, in inches, of the widest streak |
| Brightness | Grayscale view | Verifies that the highest grayscale image gray level values meet a specified minimum | Specify the brightness of the image as a fraction from 0.0 (entirely black image) to 1.0 (some pure white pixels) |
| Contrast | Grayscale view | Verifies that the range of image gray level values meets a specified minimum | Specify the contrast of the image as a fraction from 0.0 (no contrast, the entire image is one gray level) to 1.0 (maximum contrast, the image contains areas of pure black and pure white) |
| Focus | Grayscale view | Verifies that the rate of variation of gray values in the image meets a specified minimum. It is a raw measure of the image sharpness. | Valid values are 0.00 to 12.00 |
| Decompress | All views | Verifies that the image decompresses successfully | There is no test value for this test |
| Combined Image Size | IQA with no views | Verifies that the combined sizes of all of the image views do not exceed a specified maximum value | Specify the maximum number of bytes for the total size of all of the image views for the document |