Patent Number: 
Section: claims

1. An inspection device evaluation system connected to a plurality of inspection devices via a network for evaluating images obtained by these inspection devices, wherein the inspection device evaluation system evaluates the image resolution of the images obtained by the plurality of inspection devices, wherein, upon failure of an evaluation value meeting a predetermined allowable value or set value, an instruction is issued to adjust the inspection conditions of the inspection devices so as to bring the image resolution into conformity with the predetermined allowable value or set value,wherein the evaluation of the image resolution of the images comprises calculating the resolution of a plurality of partial regions in which a plurality of pixels are arranged in a matrix, and averaging the image resolutions of the plurality of partial regions thus calculated. 2. The inspection device evaluation system according to claim 1, wherein the inspection device evaluation system calculates the resolution of the partial regions based on the density gradient of the partial regions of the image. 3. The inspection device evaluation system according to claim 1, wherein the inspection device evaluation system calculates the resolution evaluation value periodically, and displays or stores the thus calculated resolution evaluation value together with time transition information. 4. The inspection device evaluation system according to claim 1, wherein the inspection device evaluation system calculates, along with the resolution, image noise of the image, an S/N ratio of the image, or at least one of image quality evaluation parameters calculated based on the resolution. 5. The inspection device evaluation system according to claim 1, wherein the inspection device evaluation system comprises the function of setting a threshold value for the resolution evaluation value, image noise, S/N ratio of the image, or an at least one of image quality evaluation parameters, wherein, upon the resolution, image noise, S/N ratio of the image, or the image evaluation parameter exceeding the threshold value, a relevant indication is displayed on a display unit or stored. 6. The inspection device evaluation system according to claim 1, wherein the inspection device evaluation system evaluates the resolution evaluation value, image noise, S/N ratio of the image, or an at least one of the image evaluation parameters periodically to generate an image evaluation value, and displays or stores the image evaluation value together with time transition information. 7. The inspection device evaluation system according to claim 1, wherein the inspection device evaluation system controls a display unit to display magnification accuracy or magnification error. 8. The inspection device evaluation system according to claim 1, wherein the unit of the resolution evaluation value is length. 9. The inspection device evaluation system according to claim 1, wherein the inspection device evaluation system determines a local resolution based on the density gradient in each of the partial regions, and performs weighted averaging over the entire image or a portion of the image. 10. The inspection device evaluation system according to claim 9, wherein the inspection device evaluation system allocates a curved surface or a plane of a multi-order or linear function z=f(x, y) to each of the partial regions, where z is the density of the image and (x, y) is the position of an arbitrary partial region within the image, wherein the control processor determines the density gradient based on a differential value of the function. 11. An inspection device evaluation system connected to a plurality of inspection devices via a network for evaluating images obtained by these inspection devices, wherein the inspection device evaluation system evaluates the image resolution of the images obtained by the plurality of inspection devices, wherein, upon failure of an evaluation value meeting a predetermined allowable value or set value, the system comprising a display unit for displaying a relevant indication,wherein the evaluation of the image resolution of the images comprises calculating the resolution of a plurality of partial regions in which a plurality of pixels are arranged in a matrix, and averaging the image resolutions of the plurality of partial regions thus calculated. 12. The inspection device evaluation system according to claim 11, wherein the inspection device evaluation system calculates the resolution of the partial regions based on the density gradient of the partial regions of the image. 13. The inspection device evaluation system according to claim 11, wherein the inspection device evaluation system calculates the resolution evaluation value periodically, and displays or stores the thus calculated resolution evaluation value together with time transition information. 14. The inspection device evaluation system according to claim 11, wherein the inspection device evaluation system calculates, along with the resolution, image noise of the image, an S/N ratio of the image, or at least one of image quality evaluation parameters calculated based on the resolution. 15. The inspection device evaluation system according to claim 11, wherein the inspection device evaluation system comprises the function of setting a threshold value for the resolution evaluation value, image noise, S/N ratio of the image, or an at least one of image quality evaluation parameters, wherein, upon the resolution, image noise, S/N ratio of the image, or the image evaluation parameter exceeding the threshold value, a relevant indication is displayed on a display unit or stored. 16. The inspection device evaluation system according to claim 11, wherein the inspection device evaluation system evaluates the resolution evaluation value, image noise, S/N ratio of the image, or an at least one of the image evaluation parameters periodically to generate an image evaluation value, and displays or stores the image evaluation value together with time transition information. 17. The inspection device evaluation system according to claim 11, wherein the inspection device evaluation system controls a display unit to display magnification accuracy or magnification error. 18. The inspection device evaluation system according to claim 11, wherein the unit of the resolution evaluation value is length. 19. The inspection device evaluation system according to claim 11, wherein the inspection device evaluation system determines a local resolution based on the density gradient in each of the partial regions, and performs weighted averaging over the entire image or a portion of the image. 20. The inspection device evaluation system according to claim 19, wherein the inspection device evaluation system allocates a curved surface or a plane of a multi-order or linear function z=f(x, y) to each of the partial regions, where z is the density of the image and (x, y) is the position of an arbitrary partial region within the image, wherein the control processor determines the density gradient based on a differential value of the function.