Vision system with color segmentation for operator enhanced viewing
An improved method for examining an article by using a vision system is presented. Also presented is a vision system for use within such a method.
1. Method for examining an article by using a vision system, wherein
the article is marked by applying a color area onto the article to identify particular characteristics of the article indicated by a primary color defining the color area,
a camera of the vision system obtains images of the article including the color area,
a processor of the vision system receives the images from the camera through an image infeed,
the processor processes the image infeed to identify the color area and generate a processed image containing the color area,
the processor feeds said processed image to an input on a display device which includes a display screen,
the processor displays the processed image on the screen with the color area displayed in the primary color or a shade thereof so that it is viewable by the operator for visual identification by the operator, and
during said processing of the image infeed, the processor removes or reduces all distracting features of the infeed image received from the camera other than the color area to generate the processed image, wherein the processed image emphasizes the color area in comparison to the distracting features to assist the operator in identifying the particular characteristics of the article indicated by the primary color for reducing eye fatigue of the operator, wherein
the article has a primary color area defined by said color area, and to validate that the correct color is used in said primary color area,
a secondary color area is applied to the article to confirm that the primary color area is present and properly applied.
2. Method according to claim 1 , wherein the article is pre-inspected to ensure that each article properly has a primary color area and to validate that the correct color is used in said primary color area.
3. Method according to any one of claims 1 to 2 , wherein the secondary color area on different articles is located at different locations relative to the primary color area.
4. Method according to claim 1 , wherein
the vision system automatically segments out and identifies the secondary color area present on the article,
the processor generates two separate processed images on the screen, wherein a first section of the screen displays the primary color area and a second section of the screen displays the secondary color area.
5. Method according to claim 1 , wherein the primary and secondary color areas are each displayed on the screen with any remaining areas of the image shown as a black screen or as a grayscale image of the article to deemphasize the distracting features in the remaining areas, wherein the respective primary and secondary color areas are emphasized and the remaining areas deemphasized through the black screen or the grayscale image.
6. Method according to claim 1 , wherein
the vision system is initially calibrated for the primary color that is considered to be conforming,
the vision system is calibrated in particular to a secondary color defining the secondary color area that is considered to be conforming,
an image of a master part is acquired by the camera so that the processor determines the data for the target color or colors and stores the data associated with said target color or colors for future processing of acquired images of actual articles.