초록 ▼

Apparatus and accompanying methods for use in a film to video transfer system for achieving automatic color balancing of color images for subsequent display on a color monitor. Specifically, this apparatus first transforms each pixel in an image to be transferred from logarithmic exposure (“log expo

Apparatus and accompanying methods for use in a film to video transfer system for achieving automatic color balancing of color images for subsequent display on a color monitor. Specifically, this apparatus first transforms each pixel in an image to be transferred from logarithmic exposure (“log exposure”) RGB color values into corresponding printing density values through local averaging, then utilizes a printing density based color correction method to generate a color correction offset value for each of the RGB primary colors, and finally converts the three resulting RGB color correction offset values from the printing density domain back to the log exposure domain wherein each offset value is subsequently used to correct the corresponding red, green and blue color values associated with each of the pixels that collectively forms a subsequent scan of the same image prior to the conversion of each of the color balanced RGB pixel values into analog video form.

대표청구항 ▼

In a system for transferring an image from a first display format to a second display format, a method for balancing the colors present in the image prior to the image being transferred to said second display format, said method comprising the steps of: providing a first set of digitized color value

In a system for transferring an image from a first display format to a second display format, a method for balancing the colors present in the image prior to the image being transferred to said second display format, said method comprising the steps of: providing a first set of digitized color values in a first domain for each pixel in a scanned image, wherein each of said digitized color values in said first set is associated with a separate primary color in said image; determining a set of local average values from said digitized color values that collectively form said scanned image, wherein each of said local average values is formed by averaging the digitized color values associated with a particular primary color for pixels that are situated within a pre-defined portion of said scanned image; converting the local average values from the first domain to a second domain to provide converted local average values; determining, in response to said converted local average values, a set of color correction offset values in said second domain, wherein each of said color correction offset values is associated with a particular one of said primary colors; converting each of said color correction offset values from said second domain to said first domain so as to generate a set of color correction offset values, wherein each of said color correction offset values is associated with a corresponding one of said primary colors; adding each one of said color correction offset values to a corresponding one of the color values in a second set of digitized color values in said first domain and associated with a corresponding primary color for each pixel in the scanned image in order to produce a set of color balanced color values in said first domain for each of said pixels in said image; and providing, in response to each of said color balanced color values for each of said pixels in said scanned image, color balanced values in said second display format for each of the pixels in the scanned image.